公开(公告)号：US10461961B2

公开(公告)日：2019-10-29

申请号：US15742381

申请日：2016-07-09

Applicant: Dengkui Zhu ,  Ping Liang

Inventor： Dengkui Zhu ,  Ping Liang

IPC: H04L25/02 ,  H04L5/00 ,  H04B7/06

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.

公开(公告)号：US10419080B2

公开(公告)日：2019-09-17

申请号：US16073330

申请日：2017-01-28

Applicant: Ping Liang

Inventor： Ping Liang ,  Dengkui Zhu

IPC: H04B7/024 ,  H04B7/0452 ,  H04B7/0417 ,  H04B17/318 ,  H04B7/06

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 transmitting signal.

公开(公告)号：US10340986B2

公开(公告)日：2019-07-02

申请号：US15576238

申请日：2016-06-15

Applicant: Ping Liang

Inventor： Boyu Li ,  Dengkui Zhu ,  Ping Liang

IPC: H04B7/0452 ,  H04B7/00 ,  H04B7/02 ,  H04L12/26 ,  H04L5/00 ,  H04L5/14 ,  H04W88/02 ,  H04W88/08

Abstract: This invention presents a method for frequency resource allocation in a MU-MTMO system comprising assigning UEs with CQI higher than a predefined value and/or CEE lower than a predefined value and/or SII lower than a predefined value to a first group and the rest UEs to a second group, allocating different frequency resource to each group, and applying different precoding or decoding algorithm to each group.

公开(公告)号：US20190181926A1

公开(公告)日：2019-06-13

申请号：US16212699

申请日：2018-12-07

Applicant: Ping Liang ,  Dengkui Zhu

Inventor： Ping Liang ,  Dengkui Zhu

IPC: H04B7/0452 ,  H04B7/06 ,  H04B17/309 ,  H04W72/04

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

公开(公告)号：US10277428B2

公开(公告)日：2019-04-30

申请号：US15742366

申请日：2016-07-09

Applicant: Ping Liang

Inventor： Junyang Shen ,  Dengkui Zhu ,  Ping Liang

IPC: H04B7/04 ,  H04B7/06 ,  H04L1/00 ,  H04L25/03 ,  H04B7/0456

Abstract: This invention presents methods for using spatial FFT to reduce the number of computations for generating the pre-coding matrix in a MIMO system comprising reducing the dimension of channel vectors by neglecting entries whose values are significantly smaller or near zero, and to select UEs into a group assigned to the same time and frequency resources.

公开(公告)号：US10230436B2

公开(公告)日：2019-03-12

申请号：US15504146

申请日：2015-10-20

Applicant: Ping Liang

Inventor： Ping Liang ,  Dengkui Zhu ,  Boyu Li

IPC: H04B7/0452 ,  H04L5/00 ,  H04W72/04

Abstract: This invention presents methods for signal detection and transmission in MU-MIMO wireless communication systems, for multiple UEs transmit uplink SRS to capture the uplink channel coefficients, and to estimate the frequency offsets and time offsets, for the BS estimating the channel coefficients of multiple UEs with the received SRS, for the BS estimating the frequency offsets and time offsets of multiple UEs with the estimated channel coefficients, for the BS modifying the estimated channel coefficients with the estimated frequency offsets and time offsets, for the BS calculating the detection matrices for the uplink MU-MIMO signal detection with the modified channel coefficients and for the BS calculating the precoding matrices for the downlink MU-MIMO signal transmission.

公开(公告)号：US20180219703A1

公开(公告)日：2018-08-02

申请号：US15742366

申请日：2016-07-09

Applicant: Ping LIANG

Inventor： Junyang Shen ,  Dengkui Zhu ,  Ping Liang

IPC: H04L25/03 ,  H04B7/06

CPC classification number: H04L25/0391 ,  H04B7/04 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/0617 ,  H04B7/0663 ,  H04L1/00 ,  H04L25/03

Abstract: This invention presents methods for using spatial FFT to reduce the number of computations for generating the pre-coding matrix in a MIMO system comprising reducing the dimension of channel vectors by neglecting entries whose values are significantly smaller or near zero, and to select UEs into a group assigned to the same time and frequency resources.

公开(公告)号：US20180115343A1

公开(公告)日：2018-04-26

申请号：US15567471

申请日：2016-05-04

Applicant: Junyang Shen ,  Ping Liang ,  Dengkui Zhu ,  Boyu Li

Inventor： Junyang Shen ,  Ping Liang ,  Dengkui Zhu ,  Boyu Li

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

Abstract: 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：US20180076881A1

公开(公告)日：2018-03-15

申请号：US15565679

申请日：2016-04-12

Applicant: Ping LIANG

Inventor： Dengkui Zhu ,  Boyu Li ,  Ping Liang

IPC: H04B7/204 ,  H04B7/04 ,  H04B7/0452

CPC classification number: H04B7/204 ,  H04B7/043 ,  H04B7/0434 ,  H04B7/0452 ,  H04L5/22

Abstract: This invention presents methods for MU-MIMO wireless communication systems comprising a BS with plural of antennas placed as a linear array or planar array, plural of UEs, for conducting two-level signal processing at the BS to reduce the system implementation complexity, i.e., the RF precoding/combination and the baseband precoding/detection, for the BS to obtain the second-order statistical information of the channel matrix of each UE to computing the RF precoding matrix through a much smaller number of pilots than that of the transceiving antennas at the BS, where the second-order statistical information of the channel matrix can be obtained through the uplink reference signals or downlink reference signals plus uplink feedback.

公开(公告)号：US09917628B2

公开(公告)日：2018-03-13

申请号：US15518149

申请日：2016-01-16

Applicant: Ping Liang ,  Dengkui Zhu ,  Boyu Li ,  Yiming Ma

Inventor： Ping Liang ,  Dengkui Zhu ,  Boyu Li ,  Yiming Ma

IPC: 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 classification number: 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

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.