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: Embodiments of this application relate to the terminal field, and disclose an email synchronization method and a device, so as to resolve a problem that unnecessary power consumption is caused because a mobile terminal performs an unnecessary synchronization operation when network signal quality is poor. A specific solution is: obtaining, by a mobile terminal, current network signal quality of the mobile terminal after obtaining an email synchronization instruction; and canceling, by the mobile terminal, execution of a synchronization operation if the network signal quality is less than a first preset threshold. The embodiments of this application are applied in an email synchronization process.

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.

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.

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 calibrating the channel state information in a multi-antenna system, especially for estimating channels transmitting in one direction using signaling transmitted in the other direction. The methods comprise transmitting a first and a second reference signal wherein one is a function of the other, and using the estimate of the channel in one direction, and the received signals from the two reference signals to obtain an estimate of the channel in the other direction between a transmitter of the multi-antenna system to an external wireless device.

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 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 signal detection and transmission in MU-MIMO wireless communication systems, for inverse matrix approximation error calculation, for adaptively selecting the number of multiplexed UEs in a MU-MIMO group, for adaptively choosing a modulation and channel coding scheme appropriate for the quality of MU-MIMO channels with the approximation error of matrix inverse being incorporated.

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.

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 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 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 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 Wireless Smart Antenna apparatus (WSA) comprising a Base Station Side Radio Unit (BSSRU) and a User Equipment Side Radio Unit (UESRU), wherein if a BSSRU is distributed in the coverage area of a Base Station (BS), the BSSRU communicates with one or more (BSs) using a first frequency band F1 and simultaneously communicates with one or more UESRUs using a second frequency band F2, or if a BSSRU is integrated into a BS, the BSSRU communicates with the BS baseband through circuits and communicates with one or more UESRUs using the second frequency band F2, wherein a UESRU communicates with one or more distributed or integrated BSSRUs using the second frequency band F2 and simultaneously communicates with one or more User Equipment (UEs) using the first frequency band F1, wherein one or more WSAs enable Multi-User Multiple Input Multiple Output spatial multiplexing in the F1 frequency band with UEs distributed over their coverage areas.

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 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 provides SRS transmission methods to meet the Massive MIMO systems requirements. These methods are described in two separate categories. Firstly, enhancements to multiplex more channels in the same resources for a given SRS transmission and to provide Massive MIMO throughput performance improvements. Secondly, scheduling enhancements to provide adaptive UE-specific scheduling based on channel conditions for each UE. These methods can be combined in different ways in each BS to optimize the channel estimation system capacity for a given level of system performance.

Abstract: This invention presents a method for uplink SRS transmission in MU-MIMO wireless communication systems comprising the BS reserving resources for SRS transmission and multiplexing the reserved resources among neighboring cells and among multiple UEs allocated to the same SRS transmission resource; the BS estimating the CQI of each UE through the uplink channel; and the BS allocating the same resource to a group of UEs to transmit uplink SRSs based on the estimated CQI and the QoS requirement.