Abstract: 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.

Abstract: A system and method for selective registration of a user equipment (UE) to one of a plurality of access points (APs). An indication may be received that each of a plurality of APs have received a signal from a UE. The UE may be registered to the first one of the plurality of APs to satisfy registration requirements associated with the UE. Information may be reported to a controller related to the signal strength of communication received at each AP from the UE. If the signal strength received at the registered AP is less than the signal strength received at one or more of the non-registered APs by more than a threshold amount, the registration of the UE to the registered AP may be rejected.

Abstract: 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.

Abstract: A system and method may include a plurality of transmit and receive antennas covering one sector of a cellular communication base station; a multi-beam RF beamforming matrix connected to the transmit and receive antennas; a plurality of radio circuitries connected to the multi-beam RF beamforming matrix; and a baseband module connected to the radio circuitries. The multi-beam RF beamforming matrix may be configured to generate one sector beam and two or more directional co-frequency beams pointed at user equipment (UEs) within the sector, as instructed by the baseband module. A number M denotes the number the directional beams and a number N denotes the number of the radio circuitries and wherein M>N.

Abstract: A system and method for selective suppression of sidelobe signals using controlled signal cancellation. An indication may be received from a single user equipment (UE) at each of two or more access points (APs) over the same channel. A relatively stronger power signal is received over a primary lobe of a communication beam of one of the APs and the relatively weaker power signal is received over a side lobe of a communication beam of another one of the APs. The efficacy of signal cancellation may be tested by turning signal cancellation on and off to measure the UE signals received at one of the APs. If interference is lower when signal cancellation is turned on, signal cancellation may be applied for continued communication with said UE to cancel side lobe signals and if interference is lower when signal cancellation is turned off, no signal cancellation may be applied.

Abstract: 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.

Abstract: 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.

Abstract: A mobile communications method, device, and system for adjusting a phase parameter in a diversity signal, based at least in part on phase feedback from a base station. While in uplink communication with a base station, a mobile device may receive a phase feedback signal from the base station. The mobile device may calculate a modified value of a phase parameter based on the phase feedback signal in order to transmit diversity signals with a gradual change in phase difference. The modified value may be between a phase parameter value indicated by the base station's phase feedback signal and a phase parameter value initially transmitted by the mobile device.

Abstract: 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.

Abstract: 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.

Abstract: A communication device operating in time division duplex (TDD) mode using multiple antennas is provided herein. The communication device uses receive channel estimation measurements to perform transmit beamforming and multiple input multiple output (MIMO) transmission, based on self-calibration of the various up/down paths via a method of transmission and reception between its own antennas, thus achieving reciprocity mapping between up and down links. Either user equipment (UE) or a base station may routinely perform this self-calibration to obtain the most current correction factor for the channel reciprocity to reflect the most current operating conditions present during TDD MIMO operation.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A mobile communications method, device, and system for adjusting a phase parameter in a diversity signal, based at least in part on phase feedback from a base station. While in uplink communication with a base station, a mobile device may receive a phase feedback signal from the base station. The mobile device may calculate a modified value of a phase parameter based on the phase feedback signal in order to transmit diversity signals with a gradual change in phase difference. The modified value may be between a phase parameter value indicated by the base station's phase feedback signal and a phase parameter value initially transmitted by the mobile device.

Abstract: 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.

Abstract: 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.

Abstract: A method and system for attenuating a received preamble in an IEEE 802.11 standard may include: a plurality of co-located access points (APs) operative in accordance with an IEEE 802.11 standard; a preamble detection unit configured to detect a transmission of a preamble in accordance of the IEEE 802.11 standard, by at least one of the co-located APs; and at least one attenuator configured to attenuate a signal received by at least one of the plurality of co-located APs upon detection of the preamble by the preamble detection unit.

Abstract: A mobile device in a (e.g., full rank N×N) MIMO system is augmented by a plurality of kn antennae coupled to at least one of N beamformers such that the total number of antennae M=?n=1n=N is greater than the total number of beamformers N. A highest gain anchor (e.g., optimal) antenna set may be selected from among a plurality of antenna sets, each antenna set comprising a different one of the kn antennae for each nth beamformer. The phase(s) of the non-selected kn?1 antennae may be set to align with the phase of the selected anchor antenna for each nth beamformer. Using TDD communication, the highest gain anchor antenna set for transmitting during the uplink periods may be determined using information measured by at least some of the plurality of M antennae while receiving during one or more downlink periods.