Patent application number | Description | Published |
20080198952 | Equalising Structure And Method With Maximum Likelihood Detection - The present invention relates to an equalising structure ( | 08-21-2008 |
20080227497 | TRANSMITTING DEVICE AND METHOD FOR TRANSMITTING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM, RECEIVING DEVICE AND METHOD FOR RECEIVING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM - A transmitting device for transmitting signals in a wireless communication system, includes at least two beam antennas, each beam antenna having a main beaming direction at a different angle and generating means for generating a number of signal streams to be transmitted within the wireless communication system, whereby the signal to be transmitted is split into these different streams and said number of signal streams corresponds to the number of beam antennas, whereby each signal stream is transmitted via a different beam antenna. Transmitting device for transmitting signals in a wireless communication system, comprising at least two beam antennas, each beam antenna having a main beaming direction at a different angle and generating means for generating a number of signal streams to be transmitted within the wireless communication system, whereby each of these signal streams comprises a different version of the data, and said number of signal streams corresponds to the number of beam antennas, whereby each signal stream is transmitted via a different beam antenna. | 09-18-2008 |
20090323795 | EQUALIZING STRUCTURE AND EQUALIZING METHOD - An equalizing structure and method for a wireless communication system receiving device, in which two or more transmit signals transmitted in parallel from one or more transmitters are received in received signal vectors representing two or more received data streams, the signals including information modulated onto carrier signals according to a modulation scheme, all possible transmit signals being represented by candidate constellation values in the signal constellation of the modulation scheme. A processor calculates an estimate for a constellation value of a received signal and determines a number of candidate constellation values in the vicinity of the estimated constellation value in the signal constellation. A metric value calculator calculates metric values based on the received signal vectors and the product of channel estimation values with candidate signal vectors, each candidate signal vector including a candidate constellation value for each of the two or more transmit signals, wherein the metric values are calculated for each constellation value of the number of candidate constellation values and the estimated constellation value. A maximum likelihood detector detects one of the candidate signal vectors having a minimum Euclidean distance to a respective receive signal vector as a most likely transmit signal vector based on the metric values. | 12-31-2009 |
20100182993 | FRAME SYNCHRONISATION SCHEME WITH INTERFERENCE REDUCTION - A frame synchronisation is proposed for a multi-band communication system, wherein a data signal exchanged between a transmitter and a receiver is organised in system frames having a preamble section which contains a frame synchronisation section that is composed of a number of symbol frames, each of which is in turn composed of a defined number of slots, whereby each slot corresponds to an individual transmission frequency band. The method comprises steps for transmitting the data signal containing a synchronisation signal in one or more slots of every other symbol frame of the frame synchronisation section, processing only data signal components selected from transmission frequency bands required for the synchronisation signal transmission, and subtracting the processed data signal from its shifted copy, whereby the copy is shifted by one symbol frame. | 07-22-2010 |
20130084815 | TRANSMITTING DEVICE AND METHOD FOR TRANSMITTING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM, RECEIVING DEVICE AND METHOD FOR RECEIVING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM - A transmitting device for transmitting signals carrying data in a wireless communication system, including at least two beam antennas, each beam antenna having a main beaming direction at a different angle; a generator configured to generate a number of signal streams to be transmitted over a wireless communication channel within the wireless communication system, wherein each of the signal streams includes a different version of the data and the number of signal streams corresponds to the number of the at least two beam antennas, wherein each signal stream is transmitted over the wireless communication channel via a different beam antenna of the at least two beam antennas; and a cyclic delay diversity unit configured to cyclically shift each different version of data and to use cyclic delay diversity. | 04-04-2013 |
20130142270 | MULTIPLE-INPUT MULTIPLE-OUTPUT SPATIAL MULTIPLEXING SYSTEM WITH DYNAMIC ANTENNA BEAM COMBINATION SELECTION CAPABILITY - A spatial diversity receiver for wirelessly receiving a modulated RF signal and a method for wirelessly transmitting and receiving the modulated RF signal. The spatial diversity receiver includes at least two antenna arrays and an antenna beam selection control unit. Each antenna array of the spatial diversity receiver includes at least two fixed beam antennas with distinct radiation patterns, and combinations of the fixed beam antennas are selectable for wireless receipt of the modulated RF signal. The antenna beam selection control unit is configured to control at least one antenna switching and/or combining unit in order to select a specific combination of fixed beam antennas from each antenna array. | 06-06-2013 |
Patent application number | Description | Published |
20120288033 | RECEIVING APPARATUS FOR HIGH FREQUENCY IMAGING SYSTEM - A receiving apparatus, a receiving method, and an imaging apparatus and method, adapted to receive high frequency image signals. The apparatus includes two or more receiver channels, each receiver channel including an antenna pattern including plural antenna elements to receive high frequency image signals, a receiving mechanism to process the high frequency image signals received by the antenna elements into baseband signals, an analog-to-digital conversion mechanism to convert the baseband signals from the receiving mechanism into digital signals, a phase shifting mechanism to phase shift the digital signals, and a combining mechanism to combine the phase shifted digital signals from the receiver channels into combined signals. | 11-15-2012 |
20120299773 | BEAM FORMING DEVICE AND METHOD - The present disclosure relates to a beam forming device, comprising a transmit unit comprising at least two transmit elements that transmit radiation towards a scene, a receiver unit comprising at least two receive elements that receive radiation from said scene and that generate receive signals from said received radiation, and a beam forming unit that performs beam forming to obtain beam formed output signals from said receive signals by use of beam forming weights, wherein said beam forming weights are adapted to a distance between the scene and one or more transmit elements and/or receive elements, said distance being indicated by a distance indicator, and wherein said beam forming weights are changed if said distance changes. | 11-29-2012 |
20120313809 | SIGNAL PROCESSING UNIT AND METHOD - A signal processing unit for accurately estimating from a time-domain signal at least one frequency and corresponding amplitude of at least one complex exponential is provided. The signal processing unit is configured to transform the time-domain signal into a frequency-domain signal, and to detect at least one peak frequency of the frequency-domain signal. The signal processing unit is further configured to determine at least one frequency band of interest corresponding to the at least one peak frequency, and to determine at least one signal-to-noise ratio corresponding to the at least one frequency band of interest. The signal processing unit is further configured to perform at least one subsequent time-domain processing step for accurately estimating the at least one frequency and corresponding amplitude of the at least one complex exponential using the at least one frequency band of interest and/or the at least one signal-to-noise ratio. | 12-13-2012 |
20130002488 | WIDEBAND BEAM FORMING DEVICE; WIDEBAND BEAM STEERING DEVICE AND CORRESPONDING METHODS - A beam forming device and method as well as to a beam steering device and method are described. The imaging beam forming device comprises a wideband transmit unit comprising at least one transmit antenna, a receiver unit comprising at least two receive antennas and at least one receive element that receive radiation from said scene and that generate receive signals from said received radiation, and a beam forming unit that performs beam forming to form a receive beam and obtain beam formed output signals from said receive signals by use of beam forming weights. For different samples or groups of subsequent samples of a receive signal, a sample representing said receive signal at a different frequency, a frequency-dependent weight is used for beam forming, which frequency-dependent weights are adapted to result in a predetermined shape of said receive beam. | 01-03-2013 |
20130016003 | BEAM FORMING DEVICE AND METHOD USING FREQUENCY-DEPENDENT CALIBRATIONAANM STIRLING-GALLACHER; RichardAACI DallasAAST TXAACO USAAGP STIRLING-GALLACHER; Richard Dallas TX USAANM TESTAR; MiquelAACI StuttgartAACO DEAAGP TESTAR; Miquel Stuttgart DEAANM DAYI; FurkanAACI StuttgartAACO DEAAGP DAYI; Furkan Stuttgart DEAANM BOEHNKE; RalfAACI EsslingenAACO DEAAGP BOEHNKE; Ralf Esslingen DEAANM BLECH; MarcelAACI HerrenbergAACO DEAAGP BLECH; Marcel Herrenberg DEAANM WANG; QiAACI StuttgartAACO DEAAGP WANG; Qi Stuttgart DE - A beam forming device that enables the use for wideband digital beam forming and provide a high accuracy a beam forming device comprises a transmitter arrangement and a receiver arrangement, wherein the total number of transmit antennas and receive antennas is at least three. A beam forming unit performs beam forming to obtain beam formed output signals from said receive signals by use of corrected beam forming weights. A correction unit corrects preliminary beam forming weights in amplitude and/or phase by use of frequency-dependent final calibration coefficients representing the different amplitude and/or phase responses of the different channels between said at least one transmit antenna and said at least one receive antenna at two or more separate frequencies covered by the radiation transmitted towards the scene. | 01-17-2013 |
20130162475 | ANTENNA ARRANGEMENT AND BEAM FORMING DEVICE - An antenna arrangement comprises a first antenna array comprising a systematic arrangement of first antennas, at least two second antenna arrays, arranged adjacent to said first antenna array and each comprising a systematic arrangement of second antennas, at least two third antenna arrays each comprising at least one third antenna, wherein a third antenna array is arranged at a border area of said first antenna array and a second antenna array and replaces a first antenna closest to the adjacent second antenna array and a second antenna closest to the adjacent first antenna array. Said first or second antennas are transmitting and the other of said first or second antennas are receiving radiation. The at least one third antenna is transmitting and/or receiving radiation. | 06-27-2013 |
20130336242 | APPARATUS AND METHODS FOR FLEXIBLE RF CONFIGURATOIN IN MULTI-ANTENNA WIRELESS SYSTEMS - An apparatus includes a baseband signal processing block, processing circuitry, and at least one radio frequency (RF) communication module communicably coupled to the baseband signal processing block and configured to communicate using a selected mode of communication in a channel. The processing circuitry is configured to detect a sub-channel band of unavailable spectrum within the channel, the band of unavailable spectrum being less than a whole of the channel. The channel includes one contiguous band of frequencies divisible into at least two non-overlapping non-adjacent sub-channels. The processing circuitry is configured to select one mode of communication selected from a plurality of modes including: a carrier aggregation (CA) only mode, a multiple input multiple output (MIMO) only mode, and a carrier aggregation multiple input multiple output (CA-MIMO) hybrid mode. | 12-19-2013 |
20140016573 | APPARATUS AND METHOD FOR RANDOM ACCESS WITH MULTIPLE ANTENNAS IN A WIRELESS NETWORK - A base station enables a mobile station to employ a random access retransmission scheme in a wireless communication network. The mobile station includes a plurality of antennas configured to communicate with the base station. The mobile station also includes a processing circuitry coupled to the plurality of antennas. The processing circuitry is configured to perform a random access during a random access channel (RACH) burst. The processing circuitry also is configured to at least one of: transmit a random access signal with at least one of an initial transmit power level and an initial transmit beamwidth, and, in response to a random access attempt failure, change at least one of a transmit (Tx) power level and a Tx beamwidth and retransmit the random access signal. | 01-16-2014 |
20140044044 | METHOD AND APPARATUS TO SUPPORT CHANNEL REFINEMENT AND MULTI-STREAM TRANSMISSION IN MILLIMETER WAVE SYSTEMS - Methods and apparatus for sending and receiving mobile station (MS) specific channel state indication reference symbols (CSI-RS) is provided. A common CSI-RS is sent from a base station (BS) and is received by an MS. First feedback is sent to the BS from the MS based on the common CSI-RS. A configuration of an MS-specific CSI-RS is sent from the BS and received by the MS. An MS specific CSI-RS is sent from the BS and is received by the MS. Second feedback is sent to the BS from the MS based on the MS specific CSI-RS. | 02-13-2014 |
20140050280 | MULTI-USER AND SINGLE USER MIMO FOR COMMUNICATION SYSTEMS USING HYBRID BEAM FORMING - A station in a wireless communication system includes a processor circuitry configured to form at least a first plurality of data streams and a second plurality of data streams, and a digital precoder configured to receive the first plurality of data streams and the second plurality of data streams. The wireless station can further include a plurality of radio frequency (RF) beamforming chains connected to the digital precoder and configured to form at least one RF envelope, wherein the digital precoder is configured to steer a plurality of digital beams within the at least one RF beam envelope, the digital beams forming a plurality of spatially distinct paths for the first plurality of data streams and a plurality of spatially distinct paths for the second plurality of data streams, and a plurality of antennas operably connected to the RF beamforming chains. | 02-20-2014 |
20140177607 | METHOD AND APPARATUS FOR RANDOM ACCESS IN COMMUNICATION SYSTEM WITH LARGE NUMBER OF ANTENNAS - A method for performing random access by a User Equipment (UE) in a wireless network, comprises configuring at least one UE transmit beam for a transmission of a random access signal, generating the at least one UE transmit beam using an antenna array according to the configuration, and transmitting the random access signal to a base station (BS) on the at least one UE transmit beam. An user equipment for performing random access in a wireless network, the User Equipment comprises a processing circuit configured to configure at least one UE transmit beam for a transmission of a random access signal, and generate the at least one UE transmit beam using an antenna array according to the configuration, and transmit the random access signal to the Base Station (BS) on the at least one UE transmit beam. | 06-26-2014 |