Class / Patent application number | Description | Number of patent applications / Date published |
342373000 | With a matrix | 83 |
20080198071 | APPARATUS AND METHOD FOR REMOVING INTERFERENCE IN TRANSMITTING END OF MULTI-ANTENNA SYSTEM - An apparatus and method for removing interference in a transmitting end of a multi-antenna system are provided. The method includes receiving channel information for all Receive (Rx) antennas; calculating a beam-forming matrix that maximizes a Signal-to-Interference plus Noise Ratio (SINR) for each Rx antenna by using the received channel information; calculating an integer value which is in proportion to an interference signal for each Rx antenna by using the received channel information and the calculated beam-forming matrix, and performing Dirty Paper Coding (DPC) on a Transmit (Tx) signal by using the calculated integer value; and performing beam-forming by multiplying the Tx signal that has undergone the DPC by the calculated beam-forming matrix. Accordingly, a highest data rate for each user and a highest diversity can be obtained. | 08-21-2008 |
20080246663 | Antenna Arrangement - An antenna has multiple antenna elements, with a beam forming Butler matrix, having antenna ports and input/output ports, with each of said antenna elements being connected to a respective port of the beam forming Butler matrix. Transceiver circuitry is connected to each of the input/output ports of the beam forming matrix by means of respective distinct transmit and receive paths and a respective duplexer. Individually controllable gain control elements are located in each of the transmit and receive paths. These can be controlled in response to signal strength measurements made by the antenna. | 10-09-2008 |
20080266176 | POWER AMPLIFIER ADJUSTMENT FOR TRANSMIT BEAMFORMING IN MULTI-ANTENNA WIRELESS SYSTEMS - One or more beamsteering matrices are applied to a plurality of signals to be transmitted via multiple antennas. The plurality of signals are provided to a plurality of power amplifiers coupled to the multiple antennas after applying the one or more beamsteering matrices to the plurality of signals. Signal energies are determined for the plurality of signals provided to the plurality of power amplifiers, and output power levels of the plurality of power amplifiers are adjusted based on the determined signal energies. | 10-30-2008 |
20080303718 | WIRELESS COMMUNICATION APPARATUS FOR DETERMINING DIRECTION OF ARRIVAL INFORMATION TO FORM A THREE-DIMENSIONAL BEAM USED BY A TRANSCEIVER - A wireless communication method and antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, (i.e., in three dimensions), to form a beam for transmitting and receiving signals. The system includes two antenna arrays, each having a plurality of antenna elements, two first stage multi-mode-port matrices, at least one second stage multi-mode-port matrix, an azimuth phase detector, an elevation amplitude detector, a plurality of phase shifters and a transceiver. The antenna arrays and the first stage multi-mode-port matrices form a plurality of orthogonal omni-directional modes. Each of the modes has a characteristic phase set. Two of the modes' phases are used to determine DOA in azimuth. The second stage multi-mode-port matrix forms a sum-mode and a difference-mode used to determine the DOA of the received signals in elevation. A beam is formed in the direction of the received signals by adjusting the phase shifters. | 12-11-2008 |
20080316099 | WIRELESS COMMUNICATION APPARATUS AND METHOD USING BEAMFORMING - A wireless transmitting method includes calculating a beamforming channel matrix which is a channel matrix generated at a time when a transmitting apparatus applies a beamforming matrix to a data signal and transmits the data signal to receiving apparatuses, selecting a parameter to be used while transmitting the data signal based on the beamforming channel matrix and noise information fed back from the receiving apparatuses, and transmitting the data signal by using the selected parameter. | 12-25-2008 |
20090046008 | MULTI-ANTENNA TRANSMITTING APPARATUS AND RETRANSMITTING METHOD OF MULTI-ANTENNA TRANSMITTING APPARATUS - A multi-antenna transmitting apparatus wherein a relatively simple selection procedure can be used to reconcile the data transmission rate and the received data quality. When a transport signal, which is required to have a higher quality than other signals, is to be transmitted, a vector multiplexing part ( | 02-19-2009 |
20090046009 | TRANSMITTING APPARATUS AND METHOD - A transmitting apparatus includes a subset matrix setting unit to set a subset matrix corresponding to a channel matrix with respect to each of a plurality of antennas of at least one of a plurality of user terminals, using channel matrices fed back from the plurality of user terminals; a beamforming matrix calculator to perform a predetermined operation using the set subset matrix so as to calculate a beamforming matrix composed of weight vectors respectively corresponding to the plurality of antennas of each of the plurality of user terminals; a beamforming processor to perform a beamforming process on data to be transmitted according to the calculated beamforming matrix so as to generate a transmission signal; and antennas to transmit the transmission signal to the plurality of user terminals. The transmitting apparatus obtains a diversity effect while removing interference between user terminals with a small quantity of computations. | 02-19-2009 |
20090046010 | SYSTEM AND METHOD FOR EFFICIENT TRANSMIT AND RECEIVE BEAMFORMING PROTOCOL WITH HETEROGENEOUS ANTENNA CONFIGURATION - A system and method of training antennas for two devices having heterogeneous antenna configurations in a wireless network is disclosed. The method includes communicating one or more estimation training sequences between two devices via a phased array antenna and a switched array antenna, wherein a beamforming vector of the phased array antenna is switched between phase vectors within a set of weight vectors while the switched array antenna is switched within a plurality of antenna sectors. The method further includes tuning at least one of the phase array and switched array antennas with an antenna parameter selected based at least in part on the one or more estimation training sequences. The method further includes communicating data messages via at least one of the phase array and switched array antennas so tuned. | 02-19-2009 |
20090051594 | Low Complexity Blind Beamforming Weight Estimation - Techniques are provided to compute beamforming weights at a communication device, e.g., a first communication device, based on transmissions received at a plurality of antennas from another communication device, e.g., a second communication device. A plurality of transmissions are received at the plurality of antennas of the first communication device from the second communication device. A covariance matrix associated with reception of a plurality of transmissions at the plurality of antennas of the first communication device is computed. Corresponding elements (e.g., all the rows or all the columns) of the covariance matrix are combined to produce a weighted channel signature vector. A receive beamforming weight vector is computed from the weighted channel signature vector. | 02-26-2009 |
20090058726 | WIRELESS COMMUNICATION APPARATUS USING FAST FOURIER TRANSFORMS TO CREATE, OPTIMIZE AND INCORPORATE A BEAM SPACE ANTENNA ARRAY IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING RECEIVER - A wireless communication apparatus which uses fast Fourier transforms (FFTs) in an orthogonal frequency division multiplexing (OFDM) receiver which incorporates a beam space antenna array. The beam space antenna array may be implemented with a Butler matrix array. The beam space antenna array may be a circular array, vertical array, or a combination of both circular and vertical arrays, for providing the desired angular antenna coverage. In one embodiment, the antenna array is optimized because the FFTs are linear invariant transform operators, whereby the order of operations in the OFDM receiver can be interchanged. | 03-05-2009 |
20090066577 | Method and System for Beamforming in a Multiple User Multiple Input Multiple Output (MIMO) Communication System Using a Codebook - A method and system for beamforming in a multiple user multiple input multiple output (MIMO) communication system using a codebook may include a processor in a node B that enables generation of an interference cancellation matrix (W | 03-12-2009 |
20090174601 | SYSTEM AND METHOD FOR ANTENNA TRACKING - A method includes determining if a dynamics requirement for an antenna positioner is exceeded, and employing a combination of mechanical and electronic beam steering techniques to steer a single antenna beam if the dynamics requirement is exceeded. | 07-09-2009 |
20090195453 | MIMO-OFDM wireless communication system - A MIMO channel frequency response matrix is decomposed into a frequency-related part and a constant part. The constant part is independent of subcarrier index and of number of subcarriers in one symbol interval. Separated QR decomposition and either SVD or GMD is applied to the two parts. A right unitary matrix (R) is obtained from the SVD or GMD applied to the constant part. QR decomposition is applied to the constant part to generate a beamforming matrix (V). In another embodiment, a selection criterion based on a correlation matrix distance is used to select a beamforming matrix that is independent of subcarrier, the selected matrix is retrieved from a local memory and applied to a received signal. Noise covariance is computed for a noise expression which considers interference generated from the applied beamforming matrix. Data detection is performed on the received signal by a MIMO data detector using the noise covariance. | 08-06-2009 |
20090201206 | METHOD AND SYSTEM FOR FLEXIBLE BEAMPATTERN DESIGN USING WAVEFORM DIVERSITY - A system and method of designing a transmit beam pattern for Waveform Diversity is provided. The method can include minimizing a difference between the transmit beampattern and a desired beampattern under an elemental constraint, and minimizing the cross-correlations between the plurality of probing signals at the one or more target locations. Desirable features of a probing signal can be achieved by designing a covariance matrix of the probing signal. The method also can include minimizing the peak sidelobe level while pointing an energy beam in a prescribed direction under an elemental power constraint. | 08-13-2009 |
20090303128 | Optically Reconfigurable Multi-Element Device - The invention relates to an optically reconfigurable multi-element device. An optical matrix formed by a set of optical elements, such as elements of OLED type, makes it possible to actuate a matrix of photoconductive elements, which will allow connection to be made between the various elements of the device to be reconfigured. | 12-10-2009 |
20090322612 | METHODS AND APPLICATIONS UTILIZING SIGNAL SOURCE MEMORY SPACE COMPRESSION AND SIGNAL PROCESSOR COMPUTATIONAL TIME COMPRESSION - A method and apparatus for a simplified approach for determining the output of a total covariance signal processor. A single set of offline calculations is performed and then used to estimate the output of the total covariance signal processor. A simplified approach for performing matrix inversion may also be used in determining the output of the total covariance processor. | 12-31-2009 |
20090322613 | METHOD AND APPARATUS TO SUPPORT SINGLE USER (SU) AND MULTIUSER (MU) BEAMFORMING WITH ANTENNA ARRAY GROUPS - A method and apparatus are used to support single user (SU) and multiuser (MU) beamforming with antenna array groups. The method and apparatus are used to precode a plurality of data streams, beamform each of the data streams, and provide each of the beamformed data streams to one of a plurality of antenna array groups. An alternate method and apparatus are used to select a beamforming vector from a codebook, transmit a common reference signal (RS) based on the selection, receive an antenna configuration responsive to the common RS, estimate channels based on the antenna configuration, determine beamforming vectors for a plurality of antenna array groups, and transmit the beamforming vectors. | 12-31-2009 |
20100013710 | ARRAY ANTENNA ARRANGEMENT - The present invention relates to an array antenna arrangement comprising at least two antenna sub-arrays and at least one antenna element in each antenna sub-array. The array antenna arrangement is adapted for calculation of a total covariance matrix (R) of a received signal vector (x). The array antenna arrangement further comprises at least one switch, where the number of switches corresponds to the number of antenna elements in each antenna sub-array. Each switch is connected to a respective radio chain, and is arranged to connect the antenna elements of a respective corresponding antenna sub-array to the respective radio chain cyclically. At least one full switch cycle, comprising a set of received signals for each switch configuration, is carried out for a calculation of the total covariance matrix (R). The present invention also relates to a corresponding method. | 01-21-2010 |
20100073233 | Transmit/receive module communication and control architechture for active array - A distributed control system for an active array antenna system is disclosed. In an exemplary embodiment, the array system employs many transmit/receive (T/R) modules each with an associated radiator element, a phase shifter element and a set of RF switch elements to set the module to transmit or receive modes. The array system is arranged to generate a transmit or receive array beam. The distributed control system in an exemplary embodiment includes an array processor for controlling the array, the processor configured to generate command signals to set the T/R module elements to transmit or receive mode and to steer the array beam to a desired direction. The command signals to steer the array beam include phase slopes common to all T/R modules in a given array or subarray. Each T/R module includes a beam steering control function configured to convert the phase slope data to phase data to set the phase shifter element for that T/R module to a phase shift setting for the beam direction associated with the phase slope index data. | 03-25-2010 |
20100090898 | ELEMENT INDEPENDENT ROUTERLESS BEAMFORMING - Described herein are systems and methods that eliminate the need for costly and complex switching networks for routing channelized data between antenna elements and beamformers. In one aspect, a beamforming system comprises a beamformer for each antenna element of an antenna array, in which the beamformers for the different antenna elements are arranged in parallel. The beamforming system also comprises a combiner that combines the outputs of the beamformers into a single beam. In one aspect, the beamformers of antenna elements that do not contribute to a desired beam output zeros to the combiner, which when added to the subbeams of the other beamformers have no affect of the final beam. In another aspect, operations (e.g., multiplication, memory reads) of each beamformer that does not contribute to a desired beam may be turned off to conserve power. | 04-15-2010 |
20100117903 | ITERATIVE ANTENNA BEAM FORMING SYSTEMS/METHODS - Methods of operating a transceiver including an antenna having a plurality of antenna feed elements are presented. The methods include defining a plurality of antenna gain constraint values g | 05-13-2010 |
20100117904 | MULTI-ANTENNA SIGNAL RECEIVING DEVICE PROCESSING MULTI-PATH INTERFERENCE - Described herein is a multi-antenna signal receiving device that includes a plurality of reception antennas that is capable of maximizing a diversity gain while eliminating a multi-path interference (MPI). The device receives a first received signal of a first antenna that includes components corresponding to a plurality of first paths and the device receives a second received signal of a second antenna that includes components corresponding to a plurality of second paths. The multi-antenna signal receiving device detects a component corresponding to a first path among the plurality of first paths, and a component corresponding to a second path among the plurality of second paths. | 05-13-2010 |
20100182198 | SYSTEM AND METHOD FOR BEAMFORMING IN A WIRELESS COMMUNICATION SYSTEM - The method for beamforming in a wireless communication system comprises the steps of: receiving a sounding packet so as to estimate channel state information between a transmitter and a receiver; generating a beamforming matrix in accordance with the channel state information; generating a beamforming steering matrix by multiplying the beamforming matrix by a rotation matrix; and feeding back the beamforming steering matrix. | 07-22-2010 |
20100201572 | System, method and apparatus for reducing the effects of low level interference in a communication system - An adaptive antenna array control system and associated method is provided for continuously and automatically assigning resources to either protect against strong interferers or to shade a spatial region, reducing gain in that spatial region, to protect against potential low power interference, thus providing improved adaptive interference cancellation system performance with limited resources. The Array biasing system is provided as an element of an adaptive antenna array control loop. | 08-12-2010 |
20100220010 | Method and apparatus for beam-forming signal in multi user-MIMO wireless communication system - A base station is capable of transmitting a signal in a wireless communication network. The base station decides channel state information matrices of respective channels by determining a state of the channels corresponding to respective transmission antennas. The base station calculates transmission beam forming vectors for the respective transmission antennas by a combination of a dot product and a cross product of the channel state information matrices. Thereafter, the base station beam-forms signals for the respective transmission antennas by using the respective transmission beam forming vectors, and transmitting the beam-formed signals. | 09-02-2010 |
20100225539 | BUTLER MATRIX FOR 3D INTEGRATED RF FRONT-ENDS - Examples of the present invention include a radar apparatus comprising a substrate, an antenna disposed on a first side of the substrate, a Butler matrix supported by same the substrate, output ports of the Butler matrix being electrically connected with a group of radiative elements; and input ports configured to be in communication with a radio frequency (RF) circuit. The RF circuit may be supported proximate or adjacent the substrate. | 09-09-2010 |
20100259446 | ACTIVE BUTLER AND BLASS MATRICES - In an exemplary embodiment, a monolithic active solution is configured to generate the fixed spatial beams of a Butler matrix operation or a Blass matrix operation. The exemplary Butler matrix comprises active RF hybrids and vector generators, and is designed for broadband performance in an ultra-compact size, which is size independent of the operating frequency. Furthermore, an exemplary Blass matrix comprises vector generators, active power combiners, and active power splitters. The Blass matrix is designed for broadband performance in an ultra-compact size, which is size independent of the operating frequency. Both the exemplary Butler matrix and exemplary Blass matrix may be configured generate steerable beams. Advantages of both the exemplary Butler matrix and exemplary Blass matrix include that they have neutral or slight positive power gain rather than high losses, and have ultra broadband range which enables operation over multiple frequency bands. | 10-14-2010 |
20100321237 | Beamforming Techniques to Improve Ranging Signal Detection - Techniques are provided herein to detect ranging codes in energy received at a plurality of antennas of a wireless communication device. Energy is received at a plurality of antennas of a first wireless communication device and received signals are generated from the received energy. The received energy comprises a ranging transmission from one or more second wireless communication devices, wherein each ranging transmission comprises a ranging code selected from a set of possible ranging codes. A ranging code specific receive beamforming weight vector is generated for a ranging code in the set of possible ranging codes from the received signals. The ranging code specific receive beamforming weight vector is applied to corresponding ranging code specific signals derived from the received signals to produce ranging code specific beamformed signals. The ranging code specific beamformed signals are correlated to produce correlation results. A determination is made as to whether the ranging code is present in the received energy based on the correlation results. | 12-23-2010 |
20100321238 | BUTLER MATRIX AND BEAM FORMING ANTENNA COMPRISING SAME - The present invention provides a reduced or compact sized Butler matrix with improved performance for use in beam forming antennas and beam forming networks (BFN) applications. The reduced or compact size of the Butler matrix is enabled by shorter transmission lines between the hybrid elements as a result of using multi-layer support surfaces with substantially parallel and overlapping hybrid elements disposed thereon. Moreover, the conductive through traces of the hybrid elements have inwardly projecting and mutually approaching portions, thereby decreasing the distance between the inputs and outputs of the hybrid elements and thus reducing the size of the Butler matrix. Comparing to antennas implemented using traditional Butler matrices, antennas incorporating the present matrix can approximately reduce effective antenna area by half in bi-sector array applications, and are more suitable for complex beam forming antennas such as downtilt antennas or arrays. | 12-23-2010 |
20110012787 | Combined Beamforming and Nulling to Combat Co-Channel Interference - Techniques are provided to improve receive beamforming at a wireless communication device that receives energy in a frequency band at M plurality of antennas, where the received energy includes desired signals and interference signals. The wireless communication device has no knowledge of the spatial signatures of the desired signals and interference signals. A weighted sum signal vector is computed from the received signals and a covariance matrix is computed from the receive signals. Eigenvalue decomposition of the covariance matrix is computed to obtain M eigenvalues of corresponding M eigenvectors of the covariance matrix. A correlation rate is computed between the M eigenvectors and the weighted sum signal vector. A combined receive beamforming and nulling weight vector is computed from the M eigenvectors and the weighted sum signal vector and based further on the correlation rate. The combined receive beamforming and nulling weight vector is applied to the received signals so as to receive beamform the desired signals and null out the interference signals. | 01-20-2011 |
20110018767 | ADAPTIVE ANTENNA BEAMFORMING - Adaptive antenna beamforming may involve a maximum signal-to-noise ratio beamforming method, a correlation matrix based beamforming method, or a maximum ray beamforming method. The adaptive antenna beamforming may be used in a millimeter-wave wireless personal area network in one embodiment. | 01-27-2011 |
20110025560 | METHOD AND SYSTEM FOR SYNTESIZING ARRAY ANTENNAS - A method for synthesizing an array factor for an array antenna based on a target shape of an array factor amplitude, includes: calculating an array factor phase based on the target shape of the array factor amplitude, and calculating array antenna weight coefficients using the least mean square method, where a target function used in the least mean square method is a complex function composed by the target shape of the array factor amplitude and the calculated array factor phase, wherein the calculated weight coefficients determine the array factor. | 02-03-2011 |
20110050498 | CLOSED SHAPE BEAM FORMING NETWORK - The invention concerns a network for distributing a plurality of input microwave signals into a plurality of output signals having a Gaussian amplitude and in-phase distribution per said input signal, the network comprising: a plurality of N input ports providing N different input signals; a plurality of M output ports, M being a multiple number of N; a plurality of P layers disposed between the inputs ports and the outputs ports, the input signals being distributed through these layers, each layer comprising an arrangement of power combiners (C) and/or power dividers (D), the arrangement is self similar with an angular rotation of k2ρ/N radian around the symmetry axis (AA′) of the polygonal closed shape formed by said input ports, k being an integer comprised between 1 and N. | 03-03-2011 |
20110102263 | RECONFIGURABLE BEAM-FORMING-NETWORK ARCHITECTURE - A beam-forming network having: a plurality (N | 05-05-2011 |
20110115675 | System and Method for Coordinated Spatial Multiplexing Using Second Order Statistical Information - A system and method for coordinated spatial multiplexing using second order statistical information is provided. A method for controller operations includes receiving second order statistics from a plurality of communications devices, computing a beamforming vector for each communications device in the plurality of communications devices, selecting a subset of communications devices from the plurality of communications devices to receive transmissions, and transmitting transmissions to the subset of selected communications devices. The beamforming vector for a communications device is based on the second order statistics provided by the communications device, and the transmitting uses the computed beamforming vector for each selected communications device to transmit the transmissions to the selected communications device. | 05-19-2011 |
20110205118 | METHOD AND SYSTEM FOR BEAMFORMING SIGNAL TRANSMISSION UNDER A PER-ANTENNA POWER CONSTRAINT - A method and system for beamforming signal transmission under a per-antenna power constraint is presented. In one aspect, a multiple input multiple output (MIMO) transmitting station may compute a per-antenna power gain factor for each of a plurality of transmit chain signals. The transmit chain signals may be concurrently transmitted by a plurality of transmitting antennas at the MIMO transmitting station. The plurality of transmit chain signals may correspond to beamforming signals, which are generated by performing spatial mapping on a plurality of space-time signals. The plurality of power gain factors may be computed based on a per-antenna power constraint. Alternatively, the plurality of power gain factors may be computed based on joint per-antenna power and total-power constraints. Each of the transmit chain signals may be amplified or attenuated based on the corresponding antenna gain factor. The amplified or attenuated signal is then transmitted by the corresponding transmitting antenna. | 08-25-2011 |
20110205119 | Dual-Beam Sector Antenna and Array - A low sidelobe beam forming method and dual-beam antenna schematic are disclosed, which may preferably be used for 3-sector and 6-sector cellular communication system. Complete antenna combines 2-, 3- or -4 columns dual-beam sub-arrays (modules) with improved beam-forming network (BFN). The modules may be used as part of an array, or as an independent 2-beam antenna. By integrating different types of modules to form a complete array, the present invention provides an improved dual-beam antenna with improved azimuth sidelobe suppression in a wide frequency band of operation, with improved coverage of a desired cellular sector and with less interference being created with other cells. Advantageously, a better cell efficiency is realized with up to 95% of the radiated power being directed in a desired cellular sector. | 08-25-2011 |
20110210892 | METHOD FOR SINGLE STREAM BEAMFORMING WITH MIXED POWER CONSTRAINTS - System and method for calculating a transmitter beamforming vector related to a channel vector h under per-antenna power constraints combined with total power constraint, under per-antenna power constraints combined with overall line of site (LOS) effective isotropic radiated power (EIRP) and under all three constraints. Calculating a transmitter beamforming vector may be done in the transmitter, in the receiver and feedback to the transmitter or in both. The method may be adapted to perform with a multi-antenna receiver and with multi-carrier systems. | 09-01-2011 |
20110241941 | METHOD FOR LOW SIDELOBE OPERATION OF A PHASED ARRAY ANTENNA HAVING FAILED ANTENNA ELEMENTS - Described is a method of modifying an antenna pattern for a phased array antenna having at least one failed antenna element. A number of proximate beamformers in a proximate angular region about a beamformer at an angle of interest are determined. Each of the proximate beamformers has a proximate beamformer weight vector. A corrected beamformer weight vector is determined for the angle of interest as a linear combination of the proximate beamformer weight vectors. Each element of the corrected beamformer weight vector that corresponds to one of the failed antenna elements has a value of zero. The method enables computation of low spatial sidelobe antenna patterns without requiring a recalibration of the antenna thereby enabling uninterrupted operation of systems that employ phased array antennas. The method can also be used to control taper loss or sidelobe level for phased array antennas that have no failed antenna elements. | 10-06-2011 |
20110248889 | Device and a Method For Establishing Communication Between Nodes in a Wireless Communication System - The present invention relates to a first node ( | 10-13-2011 |
20110291891 | METHOD AND SYSTEM FOR MIXED ANALOG/DIGITAL BEAMFORMING IN WIRELESS COMMUNICATION SYSTEMS - A method is disclosed for mixed analog/digital beamforming in a wireless communication system having transmit and receive antennas and analog front-ends connected to either the transmit antennas or the receive antennas. The method includes determining transmit and receive analog/digital beamforming coefficients by a) determining information representative of communication channels formed between a transmit antenna and a receive antenna, b) defining coefficients representing the transmit analog beamforming coefficients and the receive analog beamforming coefficients, c) determining a beamforming cost function using the information and the coefficients, the cost function taking into account the analog front-ends, d) computing an optimized set of transmit/receive analog beamforming coefficients by exploiting the cost function, e) deriving an estimate of the frequency responses of the communication channels using the information determined in process a, and f) deriving for each channel transmit/receive digital beamforming coefficients using the estimated frequency responses and the optimized beamforming coefficients. | 12-01-2011 |
20120001802 | RECEIVER INCLUDING A MATRIX MODULE TO DETERMINE ANGULAR POSITION - A receiver includes an antenna array, a plurality of phase shifters, a matrix module, a low noise amplifier module, and a down conversion module. The antenna array is coupled to receive an inbound wireless signal. The plurality of phase shifters is coupled to the antenna array and to produce a plurality of phase shifted inbound wireless signals. The matrix module is coupled to beamform the plurality of phase shifted inbound wireless signals to produce a plurality of beamformed and phase shifted inbound wireless signals having a radiation pattern that is aligned with an angular position of a source of the inbound wireless signal with respect to the receiver. | 01-05-2012 |
20120032848 | METHOD AND SYSTEM FOR ANALOG BEAMFORMING IN WIRELESS COMMUNICATION SYSTEMS - A method of analog beamforming in a wireless communication system is disclosed. The system has a plurality of transmit antennas and receive antennas. In one aspect, the method includes determining information representative of communication channels formed between a transmit antenna and a receive antenna of the plurality of antennas, defining a set of coefficients representing jointly the transmit and the receive beamforming coefficients, determining a beamforming cost function using the information and the set of coefficients, determining an optimized set of coefficients by exploiting the beamforming cost function, and separating the optimized set of coefficients into optimized transmit beamforming coefficients and optimized receive beamforming coefficients. | 02-09-2012 |
20120062421 | PHASE ROTATION TECHNIQUES IN A MULTI-USER WIRELESS COMMUNICATION ENVIRONMENT - A mechanism for mitigating inter-user interference in a multi-user wireless communication environment is disclosed. A first network device determines a plurality of steering matrices, associated with a corresponding plurality of subcarriers, for each of multiple destination devices associated with the first network device. A phase difference between corresponding steering vectors of each pair of consecutive steering matrices of the plurality of steering matrices associated with each of the destination devices is determined and phase rotation is performed to maintain phase continuity between the consecutive steering matrices. One or more pre-coding matrices are calculated based on at least a subset of the plurality of steering matrices associated with the multiple destination devices. The one or more pre-coding matrices are applied to data to be transmitted to the multiple destination devices to mitigate interference between each of the multiple destination devices. | 03-15-2012 |
20120092217 | CONTROL METHOD OF WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, AND ADJUSTMENT METHOD OF ARRAY WEIGHT VECTOR - To suppress adverse effects caused by side lobes of an antenna array when an AWV to be used for communication is determined based on a transmission/reception result of a training signal. A first transceiver generates a fixed beam pattern and transmits a training signal. In that state, a second transceiver receives the training signal while scanning for the main beam direction, and thereby determines a plurality of direction of arrivals (DOAs). Next, the second transceiver receives the training signal in a state where the signal receptions from the plurality of DODs are restricted one by one (e.g., a null direction or a direction close to the null direction is fixed in the DOA), and calculates the change of the signal characteristics from that obtained in the first reception. The transceivers obtain and use at least one AWV having the main beam direction or a sub-beam direction close to the main beam pointing to one of the plurality of DOAs except for the DOA for which the change is lower than a predefined threshold. | 04-19-2012 |
20120112963 | BUTLER MATRIX AND MULTI-PORT AMPLIFIER HAVING THE SAME - A butler matrix and a multi-port amplifier having the same, capable of splitting a single input signal into N-signals or combining N-signals into a single output are provided. The hybrids are provided in a predetermined disposition, the input port and the output port of the hybrids are provided in a predetermined direction and the waveguides are provided in a bended structure such that paths for connecting the hybrids have no crossing portion. | 05-10-2012 |
20120119953 | CONTROL METHOD OF WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION SYSTEM, ADJUSTMENT METHOD OF ARRAY WEIGHT VECTOR, AND WIRELESS COMMUNICATION DEVICE - To suppress an adverse effect caused by side lobes of an antenna array when determining an AWV to be used in communication. A first communication device transmits/receives a training signal while scanning a beam pattern, and a second communication device receives/transmits the training signal with a fixed beam pattern. A primary DOD/DOA in the first communication device is determined based on the transmission/reception result of the training signal. Then, second round training is performed. In this point, the first communication device transmits/receives the training signal while scanning a beam pattern in a state where transmission to the primary DOD or reception from the primary DOA is restricted. A secondary DOD/DOA is determined based on the result of the second round training. An AWV corresponding to the primary DOD/DOA and an AWV corresponding to the secondary DOD/DOA are selectively used in communication between the first and second devices. | 05-17-2012 |
20120200459 | BEAM FORMING METHOD AND MULTIPLE ANTENNA SYSTEM USING THE SAME - Disclosed are a beam forming method and a multiple antenna system using the same. There is provided a multiple antenna system which forms optimal beam patterns through a transmission of a training sequence between a transmitter and a receiver, each including a plurality of antennas, the multiple antenna system comprising: a transmitter selecting antennas to be activated according to a level and transmitting the training sequence to a receiver through the selected antennas; a receiver selecting the antennas to be activated according to the level and transmitting to the transmitter an index of an optimal transmission weight vector significantly reducing a cost function based on the training sequence transmitted from the transmitter, wherein the transmitter selects antennas so that the beam patterns formed by the antennas selected at a q-th level (q: the index of the level) include the beam patterns formed by the antennas selected at a q+1-th level. As a result, the transmission frequency of the training sequence may be reduced. | 08-09-2012 |
20120212371 | RECEIVE ONLY SMART GROUND-TERMINAL ANTENNA FOR GEOSTATIONARY SATELLITES IN SLIGHTLY INCLINED ORBITS - A receive only smart antenna with a command pointing option for communicating with geostationary satellites that autonomously detects the directions from which desired signal are received, and steer the multiple beams accordingly. An array feed is used to illuminate a parabolic reflector. Each feed element of the receive only smart antenna is associated with a unique beam pointing direction. As a receiver is switched to different feed elements, the far-field beam is scanned, making it possible to track a geostationary satellite in a slightly inclined orbit. This eliminates the need for mechanical tracking and maintains high antenna gain in the direction of the geostationary satellite. The receive only smart antenna also features capabilities to form multiple simultaneous beams supporting operations of multiple geo-satellites in closely spaced slightly inclined orbits. The designs can support orthogonal beams for enhanced bandwidth capacity via multiple beams with excellent spatial isolation. | 08-23-2012 |
20120212372 | METHOD OF DESIGNING WEIGHT VECTORS FOR A DUAL BEAM ANTENNA WITH ORTHOGONAL POLARIZATIONS - The present invention relates to a method of generating two beams, having orthogonal polarizations, covering a selected area using an antenna ( | 08-23-2012 |
20120229336 | ANTENNA BEAM DIRECTIVITY APPARATUS AND ANTENNA BEAM DIRECTIVITY METHOD - Provided are an antenna beam directivity apparatus and an antenna beam directivity method by which directivity accuracy of the antenna beam can be improved without adding a large scale device. | 09-13-2012 |
20120268325 | MAXIMUM LIKELIHOOD ANGLE ESTIMATION OF WIDEBAND SIGNALS USING PHASED ARRAY ANTENNAS - A method for estimating a target direction of a wideband signal received on an electronically steered array includes: applying convolutional or stretch processing to spatial frequency data of the wideband signal; initializing a stabilization direction to a beam pointing direction; stabilizing the spatial frequency data to the stabilization direction; compressing the spatial frequency data to a plurality of frequency range or time bins; selecting range or time bins and forming a covariance matrix; calculating an estimated target direction using the covariance matrix; determining if a stabilization direction accuracy condition is met; recalculating the stabilization direction based on the estimated target direction if the stabilization direction accuracy condition is not met; and iteratively repeating until the stabilization direction accuracy condition is met. | 10-25-2012 |
20120274514 | BEAMFORMING METHODS AND APPARATUSES - A method is provided for using an antenna array to create two beams (a first beam and a second beam). In one aspect, the method uses dual polarization beam forming, which allows for many degrees of freedom in designing a desired power pattern. The method is well suited for systems with multiple radio chains (e.g., systems with active antennas). The method is also well suited for multi-port systems such as TD-SCDMA. In some embodiments, the method produces two beams where (a) the shape of the power beam pattern for the first beam and the shape of the power beam pattern for the second beam are the same (or substantially the same) in a plurality of directions of interest and (b) the beams have orthogonal (or substantially orthogonal) polarizations in the coverage area. | 11-01-2012 |
20120293370 | TRANSMITTER BEAMFORMING STEERING MATRIX PROCESSING AND STORAGE - A mechanism for processing beamforming steering matrices in a transceiver system. A plurality of beamforming steering matrices associated with a plurality of subcarriers of an RF signal received at the transceiver system are generated. The beamforming steering matrices are compressed and stored. The beamforming steering matrices may also be grouped or sub-sampled prior to being stored. The beamforming steering matrices are decompressed and ungrouped before being applied to data to be transmitted. Prior to ungrouping the beamforming steering matrices, a phase difference between corresponding beamforming steering vectors of consecutive beamforming steering matrices is determined. Phase rotation is performed on the corresponding beamforming steering vectors based on the determined phase difference associated with the corresponding beamforming steering vectors to improve phase continuity between consecutive beamforming steering matrices. | 11-22-2012 |
20120319902 | ANTENNA BEAM FORMING FOR TRACKING A TRASMITTER SIGNAL - Receiver using antenna beam forming for tracking a transmitter signal and method for tracking the transmitter signal. The receiver includes a beam forming network comprising at least one beam forming channel for weighting each of N signals received from an N-element antenna array with an assigned weighting factor for forming a beam for tracking a transmitter signal of a certain transmitter, and a calibrator structured and arranged to calibrate the weighting factor (Wi) assigned to a signal (i) selected from the N signals by determining an average phase difference (ΔΦ) between consecutive samples of the selected signal and consecutive samples of a reference signal and structured and arranged to adapt the weighting factor (Wi) of the selected signal depending on the determined average phase difference (ΔΦ), where (i) is a number between 1 and N. | 12-20-2012 |
20120326928 | COMMUNICATION SYSTEM NODE COMPRISING A TRANSFORMATION MATRIX - The present invention relates to a node ( | 12-27-2012 |
20130044029 | METHOD, APPARATUS, AND SYSTEM FOR CONTROLLING MULTI-ANTENNA SIGNAL TRANSMISSION - A method for controlling multi-antenna signal transmission includes: at a first transmission time, selecting a weight vector of a signal beam whose fluctuation in angle dimension is smaller than a preset value as a first basic weight vector; weighting a signal of each antenna array element in a multi-antenna system by using the first basic weight vector, to obtain a first weighted signal on each antenna array element; and delaying the first weighted signal on each antenna array element for a corresponding set time period, so that the multi-antenna system has different transmission modes at different frequencies, and transmitting each delayed first weighted signal through its corresponding antenna array element. | 02-21-2013 |
20130050023 | Reconfigurable Active Computational Beamforming Antenna - The invention relates to an apparatus for processing the data from a plurality of digital signals ( | 02-28-2013 |
20130057433 | Method and Apparatus for Signal Detection - A method for detecting signals using an adaptive transducer arrangement, the arrangement including a transducer array having a plurality of transducers, a beamformer, and an energy detector, the method comprising: determining weights to be applied by the beamformer to signals emitted from each transducer in order to maximise a performance metric; applying the determined weights to the signals emitted from each transducer; measuring the energy received at the energy detector; comparing the measured energy with a predetermined value and based on said comparison determining whether or not one or more signals are present. | 03-07-2013 |
20130076565 | BUTLER MATRIX - A butler matrix includes at least one input coupler that is positioned at an input end of the butler matrix, receives an input signal, and divides and outputs it to a plurality of paths, and at least one output coupler that receives a signal from the input coupler and divides the signal into a plurality of paths to output it as an output signal. A separation coupler is formed in an intersecting path including an intersecting section at which transmission paths intersect among a plurality of paths through which a signal is transmitted to separate signals transmitted through different transmission paths. Further, a compensation coupler is formed in a path excluding the intersecting path to compensate a phase difference. | 03-28-2013 |
20130076566 | Method and Apparatus for Transmitting Broadcast Signal - The present invention provides a method and an apparatus for transmitting a broadcast signal. The method includes: performing dividing processing on an antenna array in a multi-antenna system to obtain multiple subarrays; obtaining a basic weight vector of each subarray among the multiple subarrays, where the basic weight vector makes a beam peak-to-average power ratio of each subarray lower than a preset threshold and makes beam patterns of different subarrays complementary to each other in a direction dimension; performing, according to a weight coefficient in each basic weight vector, weighted processing on a transmit signal of an array element in a subarray corresponding to the each basic weight vector to obtain a first signal and use the array element to transmit the first signal. The present invention implements full coverage of the broadcast signal from the multi-antenna system in all directions in a cell or a sector. | 03-28-2013 |
20130113657 | SYSTEMS AND METHODS TO INCREASE THE NUMBER OF SIMULTANEOUS PIXELS IN A WIRELESS IMAGING SYSTEM - A phased array receiver having beam-forming capability, with M inputs and N outputs, includes M radio-frequency (RF) front-ends, each comprising an RF amplifier; and a beam-forming network, with M input ports and N output ports, each coupled to at least one of the other ports through an electrical network, and wherein a signal at each port has a predetermined phase or delay relative to the signals at the other ports, and wherein M is smaller than or equal to N. | 05-09-2013 |
20130113658 | Inverse Beamformer for Inverting the Action of Existing Beamformer in Communication System - A beamformer is arranged to receive an input from a first antenna element and from at least one other antenna element and to generate at least a first and second output beam. The first and second output beams are combined at a connecting port such that signals received at the first antenna element are constructively combined at the connecting port and signals received at another antenna element or elements are destructively combined at the connecting port, so that a receiver connected to the connecting port may receive signals from the first antenna element and may not receive signals from the other antenna element or elements. The arrangement may also be used to transmit a signal which is fed into the connecting point from the first antenna element and not from the other antenna element or elements. | 05-09-2013 |
20130154881 | POWER AMPLIFIER ADJUSTMENT FOR TRANSMIT BEAMFORMING IN MULTI-ANTENNA WIRELESS SYSTEMS - One or more beamsteering matrices are applied to one or more signals to be transmitted via multiple antennas. After the one or more beamsteering matrices are applied to the one or more signals, the plurality of signals is provided to a plurality of power amplifiers coupled to the multiple antennas. Signal energies are determined for the plurality of signals provided to the plurality of power amplifiers, and relative signal energies are determined based on the determined signal energies. Output power levels of the plurality of power amplifiers are adjusted based on the determined relative signal energies. | 06-20-2013 |
20130162478 | METHOD AND APPARATUS FOR DOUBLING THE CAPACITY OF A LENS-BASED SWITCHED BEAM ANTENNA SYSTEM - A lens-based switched beam antenna system including a beam-forming lens, and a beam port router coupled to the beam-forming lens, including a plurality of beam ports, and configured to transmit beams via corresponding ones of the beam ports, wherein a first group of the beam ports corresponds to a first signal, and wherein a second group of the beam ports corresponds to a second signal. | 06-27-2013 |
20130207843 | DETERMINATION OF AN IMPAIRMENT COMPENSATION MATRIX FOR AN ANTENNA ARRAY - Determination of an impairment compensation matrix for compensation of impairments in an antenna array is disclosed. A plurality of different combinations of multi-signal transmissions which form at least one null at a respective location of a plurality of locations is determined. Each combination includes a multi-signal transmission that comprises at least two concurrent signal transmissions from at least two antenna subarrays of N antenna subarrays and the respective location. Based on signal characteristics associated with the plurality of different combinations of multi-signal transmissions and an expected signal reception at the plurality of locations, an impairment matrix that identifies an effect of impairments among the N antenna subarrays is determined. The impairment compensation matrix is determined based on the impairment matrix. | 08-15-2013 |
20130214973 | Shared Antenna Arrays With Multiple Independent Tilt - A feed network for use with an antenna array includes at least first and second RF inputs, a combiner network and a beamforming network. In some examples, additional RF inputs are provided. Each RF input corresponds to a sub-band. The first RF input for a first sub-band signal is coupled to a first sub-band parameter control; the second RF input for the second sub-band signal is coupled to a second sub-band parameter control. The combiner network is coupled to the first sub-band parameter control and to the second sub-band parameter control. The combiner network also has at least one output comprising a combination of the first sub-band signal and the second sub-band signal. The beamforming network is coupled to the combiner network and has a plurality of RF outputs. The first and second sub-band parameter controls are independently adjustable. In one example, the beamforming network comprises a Butler matrix. | 08-22-2013 |
20130229308 | ANTENNA SYSTEM - An antenna system, including: a TRX array module, an antenna element array module, a feeding network module and a Butler matrix module, is provided. The TRX array module includes multiple active TRX submodules and is configured to generate transmission signals that have undergone digital beam forming. The antenna element array module includes multiple antenna elements and is configured to transmit the transmission signals. The feeding network module is configured to form a vertical beam characteristic of the antenna element array module before the antenna element array module transmits the transmission signals. The Butler matrix module is configured to form a horizontal beam characteristic of the antenna element array module before the antenna element array module transmits the transmission signals. The antenna system reduces the feeder loss, reduces the labor and equipment costs, and enables the vertical and horizontal beam characteristics of the antenna to be adjusted more conveniently. | 09-05-2013 |
20130257655 | BEAMFORMING METHOD, APPARATUS FOR POLARIZED ANTENNA ARRAY AND RADIO COMMUNICATION DEVICE AND SYSTEM THEREOF - The invention discloses a beamforming method for polarized antenna array consisting of a plurality of antenna elements, applied to single layer beamforming or dual layer beamforming, which includes the steps: determining ( | 10-03-2013 |
20130265197 | OMNI-DIRECTIONAL MULTIPLE-INPUT MULTIPLE-OUTPUT ANTENNA SYSTEM - Disclosed is an antenna system having an approximately omni-directional radiation pattern. The antenna system comprises an antenna comprising a plurality of columns disposed in parallel with equal spacing in a circular configuration. Each column comprises an elongated ground plane; an outwards-facing array comprising a plurality of antenna elements mounted on the ground plane iri a linear configuration parallel to the longitudinal edges of the ground plane, each antenna element comprises two feeds configured to produce orthogonally polarised radiation; a first input connected to the feeds configured for a first polarisation; and a second input connected to the feeds configured for a second, polarisation. The antenna system further comprises a feeding network comprising a first circuit network and a second circuit network. The first inputs of the columns are connected to respective outputs of the first circuit network, and the second inputs of the columns are connected to respective outputs of the second circuit network. Each circuit network is adapted to impart a phase shift to each of two inputs to the circuit network that increments between the outputs of the circuit network by a multiple of 360° divided by the number of columns. | 10-10-2013 |
20130278461 | ANTENNA AND BASE STATION - The present invention provides an antenna and a base station. The antenna includes an antenna array and a first BUTLER network. The antenna array includes multiple radiating elements arranged vertically. The first BUTLER network includes n input ports and m output ports, the m output ports are respectively connected to at least one radiating element of the antenna array; the n input ports of the BUTLER network respectively receive a path of signals, and after phase adjustment and amplitude adjustment by the first BUTLER network, output signals of n groups of phase distribution combination through the m output ports, each group of phase distribution combination includes m phases, each output port respectively outputs signals of one phase in each group of phase distribution combination, the multiple radiating elements connected to the m output ports radiate n beams, where the n beams are distributed at specific angles on the vertical plane. | 10-24-2013 |
20130321207 | TRANSFORMING PRECODED SIGNALS FOR WIRELESS COMMUNICATION - Embodiments of the claimed subject matter provide a method and apparatus for transforming signals for wireless communication. One embodiment of the apparatus includes a transformer comprising a plurality of first ports and second ports. Each first port is associated with a mode of a first antenna array configuration and each second port is configurable to be communicatively coupled to one of the antennas deployed in the first antenna array configuration. This embodiment also includes a selector configurable to select a subset of the modes of the first antenna array configuration based on a degree of variation with azimuth. This embodiment further includes a mapper configured to map each of a plurality of third ports to one of the first ports associated with one of the subset of modes. Each of the third ports is associated with a mode of a second antenna array configuration. | 12-05-2013 |
20140320345 | DISTRIBUTED FEEDING DEVICE FOR ANTENNA BEAMFORMING - A distributed feeding device for antenna beamforming comprises a first distributed feeding circuit comprising P inputs and N outputs, for producing a signal on each of its outputs with a phase shift which is substantially constant between two adjacent outputs, at least one frequency multiplexer connected to at least one input of the said first circuit, a number N of frequency demultiplexers each connected, by their input, to an output of the first circuit and a second distributed feeding means comprising a plurality of inputs, each connected to an output of one of the frequency demultiplexers, and a plurality of outputs, the second distributed feeding means comprising at least one second distributed feeding circuit comprising Q inputs and M outputs, for producing a signal on each output with a phase shift which is substantially constant between two adjacent outputs, the integers P, N, Q and M being equal or distinct. | 10-30-2014 |
20140347222 | STEERABLE MICROWAVE BACKHAUL TRANSCEIVER - A first microwave backhaul transceiver may comprise a reflector and a signal processing subassembly. The signal processing subassembly may comprise a plurality of antenna elements positioned at a focal plane of the reflector. The signal processing subassembly may process a plurality of microwave signals corresponding to the plurality of antenna elements using a corresponding plurality of phase coefficients and a corresponding plurality of amplitude coefficients. The signal processing subassembly may adjust a radiation pattern of the plurality of antenna elements during operation of the signal processing subassembly through adjustment of the phase coefficients and/or the amplitude coefficients. | 11-27-2014 |
20150077291 | METHODS AND SYSTEMS FOR USING A BEAM-FORMING NETWORK IN CONJUNCTION WITH MAXIMAL-RATIO-COMBINING TECHNIQUES - Various methods and systems for (i) combining the capabilities of beam-forming networks together with the benefit of using maximal-ratio-combining techniques, and (ii) selecting receiving directions for wireless data packets in conjunction with beam-forming networks. | 03-19-2015 |
20150349421 | MILLIMETER (MM) WAVE SWITCHED BEAM ANTENNA SYSTEM - A mm-wave antenna apparatus with beam steering function that includes: a Butler Matrix feeding network; a plurality of power combiners, each power combiner having one input and N outputs, configured to apply equal phase and power to a phase distributed output signal generated by the Butler Matrix feeding network and to generate N processed signals; and a plurality of millimeter wave switched beam planar antenna arrays having at least 1.5 GHz of bandwidth and located on a top low loss dielectric substrate, each antenna array of N elements, configured to obtain direct and narrow width beams from the N processed signals combined by each power combiner. | 12-03-2015 |
20160013551 | METHOD AND APPARATUS FOR MODIFYING A RECONFIGURATION ALGORITHM FOR AN ANTENNA SYSTEM | 01-14-2016 |
20160043781 | APPARATUS AND METHOD FOR TRAINING BEAM - A system for training beam including a transmitter forming a transmission beam using a transmission array and a receiver forming a receiving beam using a receiving array is disclosed. The transmitter transmits an identifier of a transmission training beam selected from the transmission beams using a secondary synchronization signal or a common reference signal, etc. The identifier of the transmission training beam is used for the beam training. | 02-11-2016 |
20160049727 | SYSTEMS AND METHODS FOR HIGH POWER MICROWAVE COMBINING AND SWITCHING - Systems and methods for high power microwave combining and switching are provided. In at least one implementation a system includes a plurality of inputs, wherein there are M inputs in the plurality of inputs and a plurality of phase shifters, wherein there are N phase shifters in the plurality of phase shifters and N is a multiple of two times M, wherein a signal received through the plurality of inputs is divided and coupled to N/M phase shifters. The system further includes an N:N Butler matrix coupled between outputs of the N phase shifters in the plurality of phase shifters and a plurality of outputs. | 02-18-2016 |
20160087349 | METHOD AND APPARATUS FOR FORMING BEAM IN ANTENNA ARRAY - A method and an apparatus for forming a beam in an antenna array are disclosed. The method for forming a beam in an antenna array comprises the steps of: forming a first beam pattern in a first band on the basis of a single-band antenna aggregation and a multi-band antenna aggregation; and forming other beam patterns in bands other than the first band on the basis of the multi-band antenna aggregation, wherein the single-band antenna aggregation includes a plurality of single-band antennas which operate only in the first band, the multi-band antenna aggregation includes multi-band antennas which operate in a plurality of bands including the first band, and the antenna array may be arranged in a two-dimensional plane such that distances between the plurality of single-band antennas and the plurality of multi-band antennas are constant. | 03-24-2016 |
20160099502 | DEVICE AND METHOD FOR RECEIVING SIGNALS BY A PLURALITY OF RECEIVING ARRAYS - Device and method for receiving signals by a plurality of receiving arrays. The device includes a plurality L of receiving arrays, each of the L receiving arrays including: a respective number L | 04-07-2016 |
20160172756 | FEED RE-POINTING TECHNIQUE FOR MULTIPLE SHAPED BEAMS REFLECTOR ANTENNAS | 06-16-2016 |
20180026367 | Beam Forming Using an Antenna Arrangement | 01-25-2018 |