公开(公告)号：US10439845B1

公开(公告)日：2019-10-08

申请号：US15954226

申请日：2018-04-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Robert Wendell Heath, Jr. ,  Peiying Zhu ,  Ming Jia

IPC: H04B7/04 ,  H04L25/02 ,  H04B7/0408 ,  H04B7/0452 ,  H04W16/28 ,  H04L5/14 ,  H04L27/26

Abstract: A method for compressive channel estimation in a massive multiple input, multiple output (MIMO) system using sectored random beams is provided. In an embodiment, a method in a massive multiple input, multiple output (MIMO) transceiver for channel estimation includes obtaining a sector. The sector includes less than a complete coverage area of the transceiver. The method also includes transmitting, by the transceiver, a plurality of random beams to a user equipment (UE) in the sector.

公开(公告)号：US20190319822A1

公开(公告)日：2019-10-17

申请号：US15954226

申请日：2018-04-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Robert Wendell Heath, Jr. ,  Peiying Zhu ,  Ming Jia

IPC: H04L25/02 ,  H04B7/0408 ,  H04B7/0452 ,  H04W16/28

Abstract: A method for compressive channel estimation in a massive multiple input, multiple output (MIMO) system using sectored random beams is provided. In an embodiment, a method in a massive multiple input, multiple output (MIMO) transceiver for channel estimation includes obtaining a sector. The sector includes less than a complete coverage area of the transceiver. The method also includes transmitting, by the transceiver, a plurality of random beams to a user equipment (UE) in the sector.

公开(公告)号：US10250309B2

公开(公告)日：2019-04-02

申请号：US15365541

申请日：2016-11-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kien Trung Truong ,  Peiying Zhu ,  Jianglei Ma ,  Robert Wendell Heath, Jr.

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/06

Abstract: It is possible to reduce the overhead associated with downlink channel estimation in massive Multiple-Input-Multiple-Output (MIMO) networks by processing training sequences according to a transformation matrix. The transformation matrix maps a generic dictionary to a non-generic dictionary associated with an antenna geometry of a MIMO antenna array. The transformation matrix can be computed based on the two dictionaries. In one embodiment, the training reference signal is precoded to obtain a precoded training reference signal, which is then transmitted over a MIMO antenna array. The training precoder used to precode the training reference signal is designed according to the transformation matrix to mitigate a dependence that the training reference signal transmission has on the antenna geometry.