公开(公告)号：US11489598B2

公开(公告)日：2022-11-01

申请号：US16091985

申请日：2017-04-21

Applicant: Boyu Li ,  Ping Liang ,  Dengkui Zhu

Inventor： Boyu Li ,  Ping Liang ,  Dengkui Zhu

IPC: H04B17/10 ,  H04B7/0452 ,  H04B17/391 ,  H04B17/12 ,  H04B17/21 ,  H04B7/06 ,  H04L5/00 ,  H04L25/02 ,  H04L27/26

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.

公开(公告)号：US20210305713A1

公开(公告)日：2021-09-30

申请号：US17141906

申请日：2021-01-05

Applicant: Ping Liang ,  Dengkui Zhu

Inventor： Ping Liang ,  Dengkui Zhu

IPC: H01Q15/18 ,  H01Q1/24 ,  H01Q1/52 ,  H04B7/0413 ,  H04B7/10 ,  H01Q21/26 ,  H01Q21/24

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.

公开(公告)号：US11075672B2

公开(公告)日：2021-07-27

申请号：US16528568

申请日：2019-07-31

Applicant: Ping Liang ,  Dengkui Zhu

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：US10797776B2

公开(公告)日：2020-10-06

申请号：US15881786

申请日：2018-01-28

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

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

IPC: 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

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.

公开(公告)号：US10707948B2

公开(公告)日：2020-07-07

申请号：US15537874

申请日：2016-01-16

Applicant: Ping Liang

Inventor： Ping Liang ,  Junyang Shen ,  Yiming Ma ,  Lian Yin Zhang

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

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.

公开(公告)号：US10693550B2

公开(公告)日：2020-06-23

申请号：US16214077

申请日：2018-12-09

Applicant: Ping Liang ,  Boyu Li

Inventor： Ping Liang ,  Boyu Li

IPC: H04L12/28 ,  H04B7/06 ,  H04L5/00 ,  H04W16/28 ,  H04B7/0408 ,  H04B7/0452

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.

公开(公告)号：US20190356361A1

公开(公告)日：2019-11-21

申请号：US16528568

申请日：2019-07-31

Applicant: Ping Liang ,  Dengkui Zhu

Inventor： Ping Liang ,  Dengkui Zhu

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

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：US10479528B1

公开(公告)日：2019-11-19

申请号：US16182558

申请日：2018-11-06

Applicant: Ping Liang ,  Biyonka Liang

Inventor： Ping Liang ,  Biyonka Liang

IPC: B64F1/36 ,  G07C9/00 ,  G06Q20/10 ,  H02J7/02 ,  G05D1/10 ,  B64F1/00 ,  B64F1/28 ,  H04W4/44 ,  B60L53/14 ,  B60L53/12 ,  B60L53/80 ,  B60L53/66 ,  H02J7/00

Abstract: This invention discloses a distributed parking system for drones comprising a network of parking pads for drones distributed over a geographic area, each of which comprising a parking surface of one or more parking spots on which a drone can land and park securely, a power refill module that replenish the power source of a parked drone, a control module that controls functions of the parking pad, and a communication module through which the control module is connected to a communication network; and a master controller that controls functions of the parking pads and communicates commands to and receives reports from the parking pads through the communication network.

公开(公告)号：US10461820B2

公开(公告)日：2019-10-29

申请号：US16091986

申请日：2017-07-09

Applicant: Ping Liang

Inventor： Ping Liang ,  Dengkui Zhu ,  Boyu Li

IPC: H04L5/12 ,  H04B7/0452 ,  H04B7/06 ,  H04L5/14 ,  H04B7/0456 ,  H04B7/08

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.

公开(公告)号：US10419091B2

公开(公告)日：2019-09-17

申请号：US15706777

申请日：2017-09-18

Applicant: Dengkui Zhu ,  Ping Liang

Inventor： Dengkui Zhu ,  Ping Liang

IPC: H04B7/0456 ,  H04B7/0452 ,  H04W36/30 ,  H04B7/06

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.