Abstract: A method and apparatus for an access point (AP) accessing a channel occupied by a neighboring AP within clear channel assessment (CCA) range. The method is implemented by setting a transmit null towards the neighboring AP, while acquiring accurate channel knowledge with minimal bandwidth penalty to surrounding networks, via a combination of sparse explicit sounding, and a following implicit channel estimation of the neighboring APs for updating the explicit data achieved by the sparse explicit sounding. An AP implementing the method is also disclosed.

Abstract: An access point (AP) and a method implemented in an AP for 802.11 AP to AP explicit channel state information (CSI) sounding so that inter AP interference can be reduced and multiple APs transmissions that can occur simultaneously on the same radio channel. An AP may be configured to monitor signals received by its radio circuitry from at least one associated STA and at least one co-channel AP and to send a message to said at least one associated STA and said at least one co-channel AP via the radio circuitry as part of a sounding sequence implemented by the baseband processor.

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 for providing multi-beam Wi-Fi access points. The system includes one or more Wi-Fi transmit antennas beamformers; one or more Wi-Fi receive antennas or receive beamformers; and a number N of co-channel Wi-Fi access points (APs) and a number of M non co-channel APS, where all APs comply with IEEE802.11xx standard, connected to the Wi-Fi transmit antennas beamformers, wherein the Wi-Fi transmit antennas beamformers are configured to produce a plurality of non spatially adjacent beams of a common frequency, directed at a plurality of Wi-Fi user equipment (UE) such that the directional beams are sufficiently isolated from each other, and at least some of the Wi-Fi UEs communicate simultaneously with the plurality of Wi-Fi access points.

Abstract: A method of wireless data transmission may include generating, by a processor, two or more aggregated MAC protocol data units (A-MPDU's) in parallel. Each A-MPDU may be generated by aggregating MAC protocol data units (MPDU's) for different modulation coding schemes. The processor may determine a modulation coding scheme for data transmission. The processor may further transmit one of the A-MPDU's based on the determined modulation coding scheme.

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: 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.

Abstract: 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.

Abstract: A method and system for calibrating transmit and receive antenna patterns for time division duplex (TDD) is described. A station in a communications network comprises at least two antennas configured to operate together for both transmitting and receiving modes. A phase setting difference between the transmit and receive antenna patterns may be determined and used to determine a relative amplitude setting for the transmit antenna pattern and/or a relative amplitude setting for the receive antenna pattern.

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 Wi-Fi radio distribution network (RDN) station is provided for use in a wireless communications network comprising a plurality of wireless stations. The Wi-Fi RDN station comprises a multiple-input-multiple-output (MIMO) receiving system configured to operate in accordance with a channel estimation MIMO receiving scheme; and a RDN connected to the MIMO receiving system. The RDN comprises at least one beamformer arranged to be fed by two or more antennas, wherein each of the beamformers includes a combiner configured to combine signals coming from a plurality of antennas associated with the respective beamformer into a single signal. The MIMO receiving system is configured to perform one or both of channel estimation using a single antenna or beamforming. Both channel estimation and beamforming may be based on one or more packets addressed to one or more wireless stations in the communications network other than the Wi-Fi RDN station.

Abstract: A system and method for compensating phase differences between multiple local oscillators and group delay differences between multiple transceivers. The system may include; an antenna array; a plurality of transceivers connected to said antennas and operatively associated each with a local oscillator (LO), wherein at least some of the transceivers do not share a common LO, and wherein at least some of the LOs are using a common reference oscillator; a common digital beamformer circuit connected to the transceivers; a baseband processor configured to operate the system at a specified communication scheme; and a calibration circuit and software modules configured to eliminate or reduce mismatches and phase deviations between the different transceivers, wherein the calibration circuit and software modules are incorporated in system such that the elimination or reduction of mismatches and phase deviations is non-interrupting with a continuous operation of the system at the specified communication scheme.

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 for providing multi-beam Wi-Fi access points. The system includes one or more Wi-Fi transmit antennas beamformers; one or more Wi-Fi receive antennas or receive beamformers; and a number N of co-channel Wi-Fi access points (APs) and a number of M non co-channel APS, where all APs comply with IEEE802.11xx standard, connected to the Wi-Fi transmit antennas beamformers, wherein the Wi-Fi transmit antennas beamformers are configured to produce a plurality of non spatially adjacent beams of a common frequency, directed at a plurality of Wi-Fi user equipment (UE) such that the directional beams are sufficiently isolated from each other, and at least some of the Wi-Fi UEs communicate simultaneously with the plurality of Wi-Fi access points.

Abstract: 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.

Abstract: 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.

Abstract: 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/4G air protocols, wherein these metrics are extracted by the control module.

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 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.