Patent application number | Description | Published |
20130271322 | SYSTEM AND METHOD FOR ADAPTIVE BEAMFORMING FOR SPECIFIC ABSORPTION RATE CONTROL - A system may include a modifiable mobile device having at least two antennas coupled to fractional amplifiers, with returned power detectors. A beamformer unit provides adaptive beam shaping pattern, and a baseband processor provides beam pattern requirements, wherein the beamformer unit modifies the beam pattern requirements with return loss sampling information to shape the adaptive beam pattern so that a transmitted beam pattern minimizes transmitted power reflected back to the mobile device. A method may include regularly measuring a return power level, if output power is greater than a specific absorption rate level, comparing the return power level to a first threshold, else implementing mobile transmit diversity (MTD), and repeating. If the return power level is greater than the first threshold, implementing a MTD combined with reflection-based beamforming that modifies beam pattern requirements of the mobile device with return loss sampling information to create an adaptive beam pattern. | 10-17-2013 |
20130322509 | IMPLEMENTING BLIND TUNING IN HYBRID MIMO RF BEAMFORMING SYSTEMS - A system and a method for applying a blind tuning process to M antennas coupled via N beamformers to a multiple input multiple output (MIMO) receiving system having N channels, wherein M>N, are provided herein. The method includes the following steps: Periodically measuring channel fading rate at a baseband level to determine the number of antennas L out of K antennas connected to each one of the beamformers, to be combined at each one of the N beamformers; assigning the antennas to the subset L according to some criteria such as best quality indicator; repeatedly applying a tuning process to L antennas in each one of the N beamformers. | 12-05-2013 |
20130322559 | SYSTEM AND METHOD FOR DISCRETE GAIN CONTROL IN HYBRID MIMO/RF BEAMFORMING - A system for selectively and discretely amplifying or attenuating antennas in a hybrid multiple-input-multiple-output (MIMO) radio distribution network (RDN) receiving system is provided herein. The system includes a MIMO receiving system comprising a MIMO baseband module having N branches; an RDN connected to the MIMO receiving system, the RDN comprising at least one beamformer fed by two or more antennas, so that a total number of antennas in the system is M, wherein M is greater than N, wherein each one of the beamformers include a passive combiner configured to combine signals coming from the antennas coupled to a respective beamformer into a combined signal, wherein the at least one beamformer is further configured to selectively amplify or attenuate in discrete steps, one or more of the signals coming from the M antennas, based on qualitative metrics measured by the MIMO baseband module. | 12-05-2013 |
20130322560 | SYSTEM AND METHOD FOR DISTINGUISHING BETWEEN ANTENNAS IN HYBRID MIMO RDN SYSTEMS - A system for distinguishing between any one of a plurality of antennas in a multiple-input-multiple-output (MIMO) system having an augmented number of antennas is provided herein. The system includes a MIMO receiving system having N branches and configured to operate in accordance with a channel estimation MIMO receiving scheme; a radio distribution network (RDN) connected to the MIMO receiving system, the RDN comprising at least one beamformer, being fed by two or more antennas, so that a total number of antennas in the system is M, wherein M is greater than N, wherein each one of the beamformers include a combiner configured to combine signals coming from the antennas into a single signal; and at least one antenna distinguishing circuitry, each associated with a respective beamformer, wherein the antenna distinguishing circuitry is configured to distinguish between the signals coming from the antennas which feed the respective beamformer. | 12-05-2013 |
20130322561 | BEAMFORMER PHASE OPTIMIZATION FOR A MULTI-LAYER MIMO SYSTEM AUGMENTED BY RADIO DISTRIBUTION NETWORK - A system for selecting optimal phase combinations for RF beamformers in a MIMO hybrid receiving systems augmented by RF Distribution Network. The system addresses the issue of providing beamforming gains for a plurality of layers using one common set of weights for each beamformer. The specification may be based on channel estimation of all layers as viewed by all receiving antennas, and maximizing metrics that capture the total received power. | 12-05-2013 |
20130322573 | USING ANTENNA POOLING TO ENHANCE A MIMO RECEIVER AUGMENTED BY RF BEAMFORMING - A system having a multi-layer (multi-stream) multiple-input-multiple-output (MIMO) receiving system, having a MIMO baseband module and a radio distribution network (RDN) connected to the MIMO receiving system. The RDN has two or more beamformers that are fed by two or more antennas, so that a total number of antennas in the system are greater than the number of branches of the MIMO baseband module. Each of the beamformers combines RF signals coming from the antennas. The system further implements an antenna routing module that swaps antennas between different beamformers according to one or more qualitative indicators derived from the baseband module, thus increasing the probability of grouping antennas that have lower conflicts between best phases of different layers' transmitted signals. The system increases the range of antenna selection beyond the set of antennas available for each beamformer. | 12-05-2013 |
20130322574 | USING 3G/4G BASEBAND SIGNALS FOR TUNING BEAMFORMERS IN HYBRID MIMO RDN SYSTEMS - A hybrid MIMO RDN 3G/4G receiving system which include M antennas for N MIMO branches, wherein M>N is provided herein. Each branch has a beamformer so that each of the beamformers includes at least one combiner configured to combine signals coming from the antennas coupled to a respective beamformer into a combined signal. The system further includes a control module configured to tune at least one beamformer based on metrics derived by the baseband module. More specifically, the tuning of the beamformers is carried out, at least partially, using 3G/4G metrics that are generated but not usually reported in 3G/ | 12-05-2013 |
20130324055 | BEAMFORMER CONFIGURABLE FOR CONNECTING A VARIABLE NUMBER OF ANTENNAS AND RADIO CIRCUITS - A reconfigurable RF routing module may include M RF inputs and N RF outputs, wherein M is greater than N; a plurality of RF switches arranged to select between incoming RF signals; a plurality of RF combiners arranged to combine RF signals to a single RF signal; and a plurality of RF couplers, each associated with a transfer switch and a specified attenuation, wherein the specified attenuation of each one of the plurality of RF couplers is selected so that the RF inputs of each one of the plurality of the RF combiners are combined in a balanced manner, wherein the switches, the combiners, and the RF couplers are configured to route any of 1 to M of the inputs into each of the N outputs. | 12-05-2013 |
20130329820 | IMPLEMENTING TRANSMIT RDN ARCHITECTURES IN UPLINK MIMO SYSTEMS - A system for implementing a transmit uplink channel in MIMO RDN architecture is provided herein. The system includes a multiple-input-multiple-output (MIMO) transmitting system that includes a MIMO baseband module having N branches; and a radio distribution network (RDN) connected to the MIMO receiving system. The RDN includes at least one beamformer, wherein each of the beamformers feeds K transmit antennas, so that a total number of transmit antennas in the system is M=N*K. At least some of the beamformers include passive splitters/combiners configured to split the signal coming from the transmitter into multiple signals which are weighted individually going to each transmit antenna. The baseband module is configured to repeatedly apply a “blind scanning” process to at least some of the transmit antennas, one at a time, so that performance of the tested transmit beam can be graded. | 12-12-2013 |
20130343493 | USING ANTENNA POOLING TO ENHANCE A MIMO RECEIVER AUGMENTED BY RF BEAMFORMING - A system having a multi-layer (multi-stream) multiple-input-multiple-output (MIMO) receiving system, having a MIMO baseband module and a radio distribution network (RDN) connected to the MIMO receiving system. The RDN has two or more beamformers that are fed by two or more antennas, so that a total number of antennas in the system are greater than the number of branches of the MIMO baseband module. Each of the beamformers combines RF signals coming from the antennas. The system further implements an antenna routing module that swaps antennas between different beamformers according to one or more qualitative indicators derived from the baseband module, thus increasing the probability of grouping antennas that have lower conflicts between best phases of different layers' transmitted signals. The system increases the range of antenna selection beyond the set of antennas available for each beamformer. | 12-26-2013 |
20140079165 | SYSTEM AND METHOD FOR DISCRETE GAIN CONTROL IN HYBRID MIMO RF BEAMFORMING FOR MULTI LAYER MIMO BASE STATION - A multiple-input-multiple-output (MIMO) receiving system configured for receiving multiple transmission layers is provided herein. The system includes a plurality of beamformed tunable receiving antennas configured to receive a plurality of transmitted layers; and a control module configured to select for the beamformed antennas a single set of discrete weights for tuning said antennas for all of the transmitted layers so that the weights are selected for optimal performance of said receiving system, wherein said selection is carried out based on an extended Maximal Ratio Combining (MRC) metric or other quality metric measured by the MIMO baseband module, and using said measured metric separately for each beamformed antenna to determine gain or attenuation independently of phase selection. | 03-20-2014 |
20140086354 | SYSTEM AND METHOD FOR DISTINGUISHING BETWEEN ANTENNAS IN HYBRID MIMO RDN SYSTEMS - A system for distinguishing between any one of a plurality of antennas in a multiple-input-multiple-output (MIMO) system having an augmented number of antennas is provided herein. The system includes a MIMO receiving system having N branches and configured to operate in accordance with a channel estimation MIMO receiving scheme; a radio distribution network (RDN) connected to the MIMO receiving system, the RDN comprising at least one beamformer, being fed by two or more antennas, so that a total number of antennas in the system is M, wherein M is greater than N, wherein each one of the beamformers include a combiner configured to combine signals coming from the antennas into a single signal; and at least one antenna distinguishing circuitry, each associated with a respective beamformer, wherein the antenna distinguishing circuitry is configured to distinguish between the signals coming from the antennas which feed the respective beamformer. | 03-27-2014 |
20140091968 | SYSTEM AND METHOD FOR ADAPTIVE BEAMFORMING FOR SPECIFIC ABSORPTION RATE CONTROL - A system may include a modifiable mobile device having at least two antennas coupled to fractional amplifiers, with returned power detectors. A beamformer unit provides adaptive beam shaping pattern, and a baseband processor provides beam pattern requirements, wherein the beamformer unit modifies the beam pattern requirements with return loss sampling information to shape the adaptive beam pattern so that a transmitted beam pattern minimizes transmitted power reflected back to the mobile device. A method may include regularly measuring a return power level, if output power is greater than a specific absorption rate level, comparing the return power level to a first threshold, else implementing mobile transmit diversity (MTD), and repeating. If the return power level is greater than the first threshold, implementing a MTD combined with reflection-based beamforming that modifies beam pattern requirements of the mobile device with return loss sampling information to create an adaptive beam pattern. | 04-03-2014 |
20140098902 | CALIBRATION OF MIMO SYSTEMS WITH RADIO DISTRIBUTION NETWORKS - A system and method of maintaining performance of an RF Distribution Network that combines signals (phases and amplitudes) passing through components that are subjected to parameters variations due to aging and temperature is disclosed; resultant distortion is reduced or eliminated via a real time calibration. | 04-10-2014 |
20140125546 | CONTROLLING MTD ANTENNA VSWR AND COUPLING FOR SAR CONTROL - A method and apparatus has been developed to reduce SAR for a mobile device by designing appropriate matching circuits between each antenna and its power amplifier. In the presence of such matching circuits the normal phase adjustments may be carried out to provide a preferred safe SAR level that can be maintained during phase adjustment without sacrificing TRP. | 05-08-2014 |
20140133594 | CONTROL OF SAR IN MOBILE TRANSMIT DIVERSITY SYSTEMS EMPLOYING BEAM FORMING BY USING COUPLING BETWEEN DIVERSITY BRANCHES - A system and method for maximizing signal strength while limiting specific absorption rate in diversity transmission network is achieved by coupling a first input signal to a second input signal. The system includes a sampler, a coupling network, and combiner. | 05-15-2014 |
20140162679 | METHOD AND APPARATUS FOR ADAPTIVE REDUCTION OF INTERFERENCE IN A SMALL CELL OF A MOBILE TELECOMMUNICATION SYSTEM - In a cell phone telecommunication system having a macrocell and a small cell coextensive with or adjacent to the macrocell and sharing a common frequency band, interference can occur between a user device operating in the small cell, the local base station operating the user devices in the small cell on one hand and another user device serviced by a main base station for the macrocell. In order to reduce this interference, the shape of the transmission beam from at least one of the user devices or base stations is shaped into a narrow beam steered to be directed at the respective receiving unit. Alternatively, the shape of the transmission beam has a null point and the beam is steered so that its null point is directed toward the affected unit. | 06-12-2014 |
20140185719 | SYSTEM AND METHOD FOR DISCRETE GAIN CONTROL IN HYBRID MIMO/RF BEAMFORMING - A system for selectively and discretely amplifying or attenuating antennas in a hybrid multiple-input-multiple-output (MIMO) radio distribution network (RDN) receiving system is provided herein. The system includes a MIMO receiving system comprising a MIMO baseband module having N branches; an RDN connected to the MIMO receiving system, the RDN comprising at least one beamformer fed by two or more antennas, so that a total number of antennas in the system is M, wherein M is greater than N, wherein each one of the beamformers include a passive combiner configured to combine signals coming from the antennas coupled to a respective beamformer into a combined signal, wherein the at least one beamformer is further configured to selectively amplify or attenuate in discrete steps, one or more of the signals coming from the M antennas, based on qualitative metrics measured by the MIMO baseband module. | 07-03-2014 |
20140205042 | METHOD AND SYSTEM FOR USE OF QUADRATURE HYBRIDS FOR CLOSED AND OPEN LOOP BEAM FORMING TRANSMIT DIVERSITY - The present implementation is directed to a system and method of mobile transmit diversity and, more particularly, to a device which can operate in any of several modes, including a transmit diversity mode whereby two or more antennae transmit signals to at least one base station with relative phase difference, or in a non-diversity mode whereby one antenna is turned off and the other transmits at full or requisite power. | 07-24-2014 |
20140219404 | IMPLEMENTING BLIND TUNING IN HYBRID MIMO RF BEAMFORMING SYSTEMS - A system and a method for applying a blind tuning process to M antennas coupled via N beamformers to a multiple input multiple output (MIMO) receiving system having N channels, wherein M>N, are provided herein. The method includes the following steps: Periodically measuring channel fading rate at a baseband level to determine the number of antennas L out of K antennas connected to each one of the beamformers, to be combined at each one of the N beamformers; assigning the antennas to the subset L according to some criteria such as best quality indicator; repeatedly applying a tuning process to L antennas in each one of the N beamformers. | 08-07-2014 |
20140233486 | METHOD AND APPARATUS FOR RANDOM ACCESS CHANNEL PROBE INITIALIZATION USING TRANSMIT DIVERSITY - Embodiments of the present invention may separately utilize transmit paths of a mobile transmit diversity device to initialize communication with a base station over a random access channel, particularly where the transmit paths have power amplifiers with different characteristics, e.g., different power amplification. | 08-21-2014 |
20140247820 | METHOD AND SYSTEM FOR SELECTIVE ATTENUATION OF PREAMBLE RECEPTION IN CO-LOCATED WI FI ACCESS POINTS - A method and system for attenuating a received preamble in an IEEE | 09-04-2014 |
20140293869 | SYSTEM AND METHOD FOR CO-LOCATED AND CO-CHANNEL WI-FI ACCESS POINTS - A wireless communication system may include a first transceiver co-located with a second transceiver. The first and second transceivers may be configured to transmit data to at least one user equipment, according to a collision sense multiple access/collision avoidance (CSMA/CA) protocol. A processor may identify data transmission from the second transceiver and allow data transmission from the first transceiver simultaneously with data transmission from the second transceiver, on one frequency. | 10-02-2014 |
20140313986 | DEVELOPING TRANSMISSION GAPS FOR CALIBRATION PROCESSING - A plurality of co-located beamforming transceivers may transmit data to at least one user equipment according to a collision sense multiple access/collision avoidance (CSMA/CA) protocol. The plurality may include a first and a second beamforming transceiver. The first beamforming transceiver may request a calibration signal from the second beamforming transceiver. A processor or transceiver may identify a transmission gap between the user equipment and the plurality of beamforming transceivers. The second beamforming transceiver may transmit a calibration signal during the transmission gap to the first beamforming transceiver. | 10-23-2014 |
20140334312 | METHOD AND SYSTEM FOR DIGITAL CANCELLATION SCHEME WITH MULTI-BEAM - A method and system may include a plurality of collocated access points (APs), each coupled to, and operating independently with, a respective set of antennas, wherein the antennas are directional and oriented to create beams that cover different directions, for dividing a coverage of the APs into a plurality of subsectors, wherein the antennas further comprise transmit antennas and receive antennas separated from each other, wherein the APs operate with a limited number of channels, wherein two or more of the subsectors share a common channel, wherein the APs are configured to initiate a transmission by employing collision sense multiple access/collision avoidance (CSMA/CA), wherein the antennas are configured to enable simultaneous operation of each of the subsectors without impairing operation of the others, and wherein a radio frequency (RF) energy reception between the transmit antennas and the receive antennas is configured to prevent independent subsector operation because of the CSMA/CA. | 11-13-2014 |
20140341314 | IMPLEMENTING MULTI USER MULTIPLE INPUT MULTIPLE OUTPUT (MU MIMO) BASE STATION USING SINGLE-USER (SU) MIMO CO-LOCATED BASE STATIONS - A system that implements multi user multiple inputs multiple outputs (MU MIMO) base station using a plurality of co-located single-user (SU) MIMO base stations is provided herein. The system may include a number N co-located single-user multiple input multiple output (SU-MIMO) bases stations each having a number K MIMO rank, wherein said N co-located SU-MIMO base stations are configured to share a common antennas array, operating over a common frequency band; a front-end MIMO processor connected to said N co-located SU-MIMO base stations and further coupleable to said common antennas array; and a back-end coordinator configured to collaboratively assist in optimizing operation of said N co-located SU-MIMO base stations, such that said N co-located SU-MIMO base stations and said front-end MIMO processor collaboratively implement a multi-user multiple input multiple output (MU-MIMO) base station capable of dynamically separating a coverage area into N*K spatial channels. | 11-20-2014 |
20140376671 | BEAMFORMER PHASE OPTIMIZATION FOR A MULTI-LAYER MIMO SYSTEM AUGMENTED BY RADIO DISTRIBUTION NETWORK - A system for selecting optimal phase combinations for RF beamformers in a MIMO hybrid receiving systems augmented by RF Distribution Network. The system addresses the issue of providing beamforming gains for a plurality of layers using one common set of weights for each beamformer. The specification may be based on channel estimation of all layers as viewed by all receiving antennas, and maximizing metrics that capture the total received power. | 12-25-2014 |
20150016438 | SYSTEM AND METHOD FOR SIMULTANEOUS CO-CHANNEL ACCESS OF NEIGHBORING ACCESS POINTS - A system and method for overriding Carrier-Sense-Multiple-Access/Collision-Avoidance (CSMA/CA) and virtual carrier sense, without harming the traffic that occupies the channel is described herein. Further provided herein are measurements and qualifying criteria for performing the aforementioned channel sharing. The system and method may be based, for example, on opportunistic spatial isolation of nodes from each other and selectively implementing ultra-fast link adaptation. | 01-15-2015 |
20150049680 | SYSTEM AND METHOD FOR CO-LOCATED AND CO-CHANNEL WI-FI ACCESS POINTS - A wireless communication system may include a plurality of co-located transceivers. The plurality of transceivers may be configured to transmit data to at least one user equipment, according to a collision sense multiple access/collision avoidance (CSMA/CA) protocol. A processor may receive a signal preamble and a sender address of the signal preamble and determine whether the sender address is included in the stored list of addresses. If the sender address is included in the stored list of addresses, the processor may allow simultaneous data transmission from two or more of the co-located transceivers. | 02-19-2015 |
20150050896 | METHOD, SYSTEM AND APPARATUS USING MULTIPLE FEEDBACKS FOR UPLINK CLOSED-LOOP BEAMFORMING - A method, apparatus, and system for transmitting and controlling uplink diversity signals in a mobile communication device. While in a soft handoff situation, a mobile communications device may receive a phase feedback signal from a non-serving base station. The mobile device may calculate a modified phase parameter based on the phase feedback signal from the non-serving base station in order to minimize interference with the non-serving base station, for example, by calculating a modified value of a phase difference in a direction opposite to the direction desired by the non-serving base station. In some embodiments of the invention, the mobile device may determine whether to calculate the modified phase parameter in a direction opposite to the direction indicated by the phase feedback signal of the non-serving base station based on a comparison of power feedback signals received from the non-serving and serving base stations. | 02-19-2015 |
20150071186 | SYSTEM AND METHOD FOR COOPERATIVE SCHEDULING FOR CO-LOCATED ACCESS POINTS - Systems and methods of scheduling data for transmission from an access point “AP” to a station in a system of multiple co-located APs may include determining whether the station is also able to receive transmitted data from another of the multiple co-located APs. If the determining is negative the data is transmitted but if the determination is positive, the data may be transmitted only after ascertaining that exclusive permission to transmit the data to the station has been granted to the AP. | 03-12-2015 |
20150071270 | METHOD AND SYSTEM FOR ACCESSING AN OCCUPIED WI-FI CHANNEL BY A CLIENT USING A NULLING SCHEME - A method and system for overriding Carrier-Sense-Multiple-Access/Collision-Avoidance (CSMA/CA) without harming the traffic that occupies the channel are provided. The system and method may include for example detecting at a communication node having a plurality of antennas, a preamble transmitted by a co-channel neighboring node operating in compliance with IEEE 802.11 standard within a clear channel assessment (CCA) range of the communication node; and setting uplink transmit weights of the antennas of the communication node, to isolate the communication node from the neighboring node after the neighboring node has transmitted the preamble, to allow the communication node to access the co-channel, by keeping a transmitted signal level of the communication node as received by the neighboring node, below the CCA signal level at one or more of the antennas of said neighboring node. The system may for example implement the method in software running on a baseband processor. | 03-12-2015 |