Abstract: This invention discloses methods to enhance Physical Layer (PHY) processing in a radio access network between a Base Station (BS) and one or more User Equipment (UEs), including enhanced Hybrid Automatic Repeat Request (HARQ) management, transmitting path processing to reduce transfer bandwidth between an offload processor and a CPU, and offload processing to reduce HARQ latency.

Abstract: This invention presents a channel emulator for testing a multi-user multiple input multiple output (MU-MIMO) wireless communication system using an over-the-air (OTA) connection between the antennas of a base station (BS) and the channel emulator. It uses pilot signals with special structures to estimate the channel matrix between the BS and the channel emulator, equalizes the channel when performing emulation of the channels between the BS and a plural of user equipment (UEs) in MU-MIMO communication.

Abstract: This invention presents embodiments of a coupler array to couple the RF signals between the antenna array of a MIMO base station and a MIMO RF channel emulator. The embodiments enable testing of a large scale MIMO wireless communication system without the need of connecting a large number of RF cables to the antenna ports of the MIMO base station.

Abstract: This invention presents a method and systems for beamforming in wireless communication comprising a base station with a plural of antennas and radio frequency transmitting and receiving chains, a plural of base band transmitting paths and base band receiving paths, and a processor that constructs a subspace for each user equipment using the principal angle information contained in partial channel state information obtained on channels associated with a part of the BS antennas, derives an analog beamforming matrix and/or an analog combining matrix from the subspaces of all the user equipment selected for communication with the base station to achieve analog beamforming, and further performs beamforming at the base band.

Abstract: This invention presents a method and systems for beamforming in wireless communication comprising a base station with a plural of antennas and radio frequency transmitting and receiving chains, a plural of base band transmitting paths and base band receiving paths, and a processor that constructs a subspace for each user equipment using the principal angle information contained in partial channel state information obtained on channels associated with a part of the BS antennas, derives an analog beamforming matrix and/or an analog combining matrix from the subspaces of all the user equipment selected for communication with the base station to achieve analog beamforming, and further performs beamforming at the base band.

Abstract: This invention presents a repeater enhanced MU-MIMO wireless communication system comprising a BS, a plural of repeaters, and a plural of UEs, where a repeater estimates the channel between itself and its upper communication node in the system, a repeater computes equalization coefficients based on the estimation of the channel coefficients, and a repeater applies the equalization coefficients to reduce the channel delay spread or increase the coherence bandwidth of the channel between communication nodes containing the BS, the UEs, or the repeaters.

Abstract: This invention presents embodiments of a coupler array to couple the RF signals between the antenna array of a MIMO base station and a MIMO RF channel emulator. The embodiments enable testing of a large scale MIMO wireless communication system without the need of connecting a large number of RF cables to the antenna ports of the MIMO base station.

Abstract: This invention presents Capacity Projectors (CaPs) for intelligent control and management that collect information on channel conditions, actual and/or predicted demand for connectivity, data throughput and its distribution for a first time period in the future using signaling and control messages, analyze the collected information to identify the configurations of the BSs and CaPs that are needed to produce desired MU-MIMO communication channels in the first time period to meet the connectivity and data throughput demand and its distribution in the first time period, and adaptively control and configure the CaPs to actively shape the MU-MIMO communication channels to meet the predicted demand and its distribution, wherein controlling and configuring the CaP comprises implementing which of the CaPs to switch to sleeping mode or work mode and adjusting one or more of transmitting power gain, antenna tilt, beam direction and/or pattern of the transmitter and/or receiver, filtering of the receiving and/or transm

Abstract: This invention presents methods for MU-MIMO wireless communication systems comprising a BS with plural of antennas, either closely located or distributed; A plural of AFRs deployed over a coverage area, each AFR has NBF?1 BF antennas with a beam pattern facing the MU-BFer and NUF?1 UF antennas with a beam pattern facing UEs or downstream AFR(s); A channel estimation module for estimating the Total Channels between a plural of UEs and the BS with the AFRs in place; and, A MU-BFer that uses the estimates of the Total Channels to perform beamforming computations for transmitting and/or receiving multiple spatially multiplexed streams of signals to or from a plural of UEs using the same frequency resource.

Abstract: This invention presents embodiments of a coupler array to couple the RF signals between the antenna array of a MIMO base station and a MIMO RF channel emulator. The embodiments enable testing of a large scale MIMO wireless communication system without the need of connecting a large number of RF cables to the antenna ports of the MIMO base station.

Abstract: This invention presents methods and systems for RF path and antenna connection and switch in wireless communication comprising an electromagnetic lens and M antennas; N (N<=M) radio frequency (RF) transmitting and receiving chains/paths that contain Low Noise Amplifiers (LNAs), RF filters, mixers, amplifiers; a plural of digital to analog converters (DACs) and analog to digital converters (ADCs); a connection and switch network that maps the signals from M antennas to N RF paths in the UL or mapping the signals from N RF path to M antennas in the DL, and a processor unit that measures and estimates the receiving signal strength (RSS) or the equivalent metrics on each antenna for each user equipment (UE) based on the received UL reference signals, and drives signals to control the connection and switch network to connect RF paths and antennas for data transmission.

Abstract: This invention presents methods for estimating MU-MIMO channel information using SU-MIMO channel information to choose a modulation and channel coding appropriate for the quality of the MU-MIMO channels, for adaptively selecting MU-MIMO precoding methods based on estimations of a plural of UEs and for compensating hardware impairments in MU-MIMO precoding.

Abstract: This invention presents methods for MU-MIMO wireless communication systems comprising a BS with plural of antennas, either closely located or distributed; A plural of AFRs deployed over a coverage area, each AFR has N_BF?1 BF antennas with a beam pattern facing the MU-BFer and N_UF?1 UF antennas with a beam pattern facing UEs or downstream AFR(s); A channel estimation module for estimating the Total Channels between a plural of UEs and the BS with the AFRs in place; and, A MU-BFer that uses the estimates of the Total Channels to perform beamforming computations for transmitting and/or receiving multiple spatially multiplexed streams of signals to or from a plural of UEs using the same frequency resource.

Abstract: This invention presents a RF channel emulator for testing a millimeter wave (mmWave) wireless communication system, including embodiments of using over-the-air channels for connecting a RF channel emulator and mmWave wireless communication system, placement of antenna arrays, antenna array design, antenna selection, and polarization matrices estimation that complete both the beam scanning at the BS and UEs and normal data transmission.

Abstract: This invention presents methods for power allocation for each data stream on each transmitting antennas in MU-MIMO wireless communication systems comprising the BS computing the temporary beamforming matrix, constructing special matrices and vectors with the maximum transmitting power on each antenna, the allocated power to each data stream, the channel quality of each data stream, and the amplitude of each element of the temporary beamforming matrix, calculating the power allocated to each data stream on each antenna with the calculated special matrices and vectors, and adjusting each element of the temporary beamforming matrix to obtain the final beamforming matrix.

Abstract: This invention presents methods comprising a BS with a plural of antennas capable of beamforming two or more spatial multiplexed streams with two or more antennas on UEs; using one or more of relays to project the capacity of the BS to cover one or more UEs; the BS estimating the uplink channel state information (CSI) between each antenna on the BS and each antenna on the one or more UEs using pilots transmitted from the UE antennas in the presence of the relays which amplifies and forwards the one or more pilots; and, the BS making use of the perseverance of the reciprocity of the over the air channel by the symmetry of the DL and UL paths of the relays to obtain the downlink CSI using the estimated uplink CSI that includes the effect of the relays.

Abstract: This invention discloses methods and circuits of wideband wireless transmitting and/or receiving by combining multiple RF transmitters and/or receivers, or multiple transceivers, each of which has a narrower bandwidth, e.g., producing a RF transmitter and receiver or a RF transceiver whose signal bandwidth is the sum or approximately the sum, e.g., slightly less than the sum, of the signal bandwidth of the multiple RF transmitters and/or receivers, or multiple RF transceivers. The embodiments apply in wireless communication systems with orthogonal or approximately orthogonal subcarrier type of modulation (OSM), e.g., Orthogonal Frequency Division Multiplexing (OFDM).

Abstract: This invention presents a millimeter wave (mmWave) Customer Premise Equipments (CPEs) employing a forward processing equipment, such as a small cell, a decode-and-forward repeater, an amplify-and-forward repeater, etc., that is able to simultaneously serving its local customer premise and another or other mmWave CPEs; and a method for a Base-Station (BS) to provide mmWave backhaul links to multiple mmWave CPEs where a mmWave CPE within the Line-of-Sight (LoS) coverage of the BS is directly served by the BS in one set of time-frequency-spatial resources, while a mmWave CPE out of the LoS coverage of the BS is served by another a mmWave CPE within or out of the LoS coverage of the BS in another set of time-frequency-spatial resources.

Abstract: This invention presents a millimeter wave (mmWave) Distributed Wireless Smart Antenna (DWSA) or scanning-capable repeater that can form different radio wave beam patterns to scan for spatial beam direction(s) or beam alignment to build one or more mmWave wireless links with one or more User Equipment, and complete pass-through beamforming with one or more central base stations.

Abstract: This invention provides methods for Distributed Massive MIMO (DM-MIMO) that use one or more central Baseband Units (BBUs), one or more Multi-User Beamformers for each BBU performing multi-user MIMO computations, and a number of RRHs distributed over a geographic area.