公开(公告)号：US20180212711A1

公开(公告)日：2018-07-26

申请号：US15744425

申请日：2016-06-28

申请人： Dengkui Zhu ,  Boyu Li ,  Ping Liang

发明人： Dengkui Zhu ,  Boyu Li ,  Ping Liang

IPC分类号： H04L1/00 ,  H04L5/00 ,  H04W72/08

CPC分类号： H04L1/0026 ,  H04B7/0452 ,  H04L5/0048 ,  H04L5/0057 ,  H04W72/0413 ,  H04W72/085

摘要： 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.

公开(公告)号：US20180139703A1

公开(公告)日：2018-05-17

申请号：US15576709

申请日：2016-06-28

申请人： Dengkui Zhu ,  Boyu Li ,  Ping Liang

发明人： Dengkui Zhu ,  Boyu Li ,  Ping Liang

IPC分类号： H04W52/24 ,  H04W72/04 ,  H04B7/0452 ,  H04W52/34

摘要： 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.

公开(公告)号：US20220060232A1

公开(公告)日：2022-02-24

申请号：US17453833

申请日：2021-11-05

申请人： Dengkui Zhu ,  Boyu Li ,  Ping Liang

发明人： Dengkui Zhu ,  Boyu Li ,  Ping Liang

IPC分类号： H04B7/06 ,  H04W16/28 ,  H04B7/0452 ,  H04W88/10

摘要： 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.

公开(公告)号：US10594377B2

公开(公告)日：2020-03-17

申请号：US16383603

申请日：2019-04-13

申请人： Ping Liang ,  Dengkui Zhu ,  Boyu Li

发明人： Ping Liang ,  Dengkui Zhu ,  Boyu Li

IPC分类号： H04B7/06 ,  H04B7/0452

摘要： 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.

公开(公告)号：US20170244512A1

公开(公告)日：2017-08-24

申请号：US15503995

申请日：2015-09-25

申请人： Ping Liang ,  Dengkui Zhu ,  Boyu Li

发明人： Ping Liang ,  Dengkui Zhu ,  Boyu Li

IPC分类号： H04L1/00 ,  H04L25/03 ,  H04B7/0452

CPC分类号： H04L1/0003 ,  H04B7/04 ,  H04B7/0452 ,  H04B7/0617 ,  H04L1/00 ,  H04L1/0009 ,  H04L25/03006 ,  H04L2025/03624

摘要： 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.

公开(公告)号：US20220255677A1

公开(公告)日：2022-08-11

申请号：US17169451

申请日：2021-02-06

申请人： Dengkui Zhu ,  Jason Brent ,  Boyu Li ,  Ping Liang

发明人： Dengkui Zhu ,  Jason Brent ,  Boyu Li ,  Ping Liang

IPC分类号： H04L1/18 ,  H04L1/00

摘要： 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.

公开(公告)号：US11012136B2

公开(公告)日：2021-05-18

申请号：US16407174

申请日：2019-05-08

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 ,  H04B7/08 ,  H04B17/336 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/155 ,  H04L5/00 ,  H04L25/02 ,  H04L29/06 ,  H04W16/28 ,  H04L5/14 ,  H04W84/18 ,  H04W88/08

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 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.

公开(公告)号：US20180115343A1

公开(公告)日：2018-04-26

申请号：US15567471

申请日：2016-05-04

申请人： Junyang Shen ,  Ping Liang ,  Dengkui Zhu ,  Boyu Li

发明人： Junyang Shen ,  Ping Liang ,  Dengkui Zhu ,  Boyu Li

IPC分类号： H04B1/7093 ,  H03F1/26 ,  H04L25/03 ,  H04B7/0413

摘要： This invention presents a repeater enhanced MU-MIMO wireless communication system com-prising 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.

公开(公告)号：US09917628B2

公开(公告)日：2018-03-13

申请号：US15518149

申请日：2016-01-16

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 ,  H04B7/0452 ,  H04B7/155 ,  H04L25/02 ,  H04B7/0456 ,  H04L29/06 ,  H04B17/336 ,  H04L5/00 ,  H04W16/28 ,  H04W88/08 ,  H04L5/14 ,  H04W84/18

CPC分类号： H04B7/0695 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/088 ,  H04B7/15507 ,  H04B17/336 ,  H04L5/0048 ,  H04L5/14 ,  H04L25/0202 ,  H04L69/22 ,  H04W16/28 ,  H04W84/18 ,  H04W88/085

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.

公开(公告)号：US20170257155A1

公开(公告)日：2017-09-07

申请号：US15518149

申请日：2016-01-16

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 ,  H04B7/155 ,  H04L25/02 ,  H04W16/28 ,  H04L29/06 ,  H04B17/336 ,  H04L5/00 ,  H04B7/0452 ,  H04B7/0456

CPC分类号： H04B7/0695 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/088 ,  H04B7/15507 ,  H04B17/336 ,  H04L5/0048 ,  H04L5/14 ,  H04L25/0202 ,  H04L69/22 ,  H04W16/28 ,  H04W84/18 ,  H04W88/085

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.