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    Symmetric and full duplex relay in wireless systems
    2.
    发明授权
    Symmetric and full duplex relay in wireless systems 有权

    公开(公告)号：US10707948B2

    公开(公告)日：2020-07-07

    申请号：US15537874

    申请日：2016-01-16

    申请人： Ping Liang

    发明人： Ping Liang ,  Junyang Shen ,  Yiming Ma ,  Lian Yin Zhang

    IPC分类号： H04B7/06 ,  H04B7/14 ,  H04L27/26 ,  H04L5/14 ,  H04B7/0452 ,  H04B7/155

    摘要： 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.

    BEAMFORMING IN A MU-MIMO WIRELESS COMMUNICATION SYSTEM WITH RELAYS
    3.
    发明申请
    BEAMFORMING IN A MU-MIMO WIRELESS COMMUNICATION SYSTEM WITH RELAYS 审中-公开

    公开(公告)号：US20180234157A1

    公开(公告)日：2018-08-16

    申请号：US15881786

    申请日：2018-01-28

    申请人： Ping Liang ,  Dengkui Zhu ,  Boyu Li ,  Yiming Ma

    发明人： Ping Liang ,  Dengkui Zhu ,  Boyu Li ,  Yiming Ma

    IPC分类号： H04B7/06 ,  H04B17/336

    摘要： 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.

    SYMMETRIC AND FULL DUPLEX RELAY IN WIRELESS SYSTEMS
    8.
    发明申请
    SYMMETRIC AND FULL DUPLEX RELAY IN WIRELESS SYSTEMS 审中-公开

    公开(公告)号：US20180013483A1

    公开(公告)日：2018-01-11

    申请号：US15537874

    申请日：2016-01-16

    申请人： Ping LIANG

    发明人： Ping Liang ,  Junyang Shen ,  Yiming Ma ,  Lian Yin Zhang

    IPC分类号： H04B7/14 ,  H04B7/06 ,  H04L5/14 ,  H04L27/26

    摘要： 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.