公开(公告)号：US20230033028A1

公开(公告)日：2023-02-02

申请号：US17786083

申请日：2020-01-14

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Lijun WANG ,  Weiqiang MAO ,  Zhijun LIAO ,  Youbao LUO ,  Stefan WESEMANN

IPC: H04B7/06 ,  H04B7/0452

Abstract: According to embodiments of the present disclosure, downlink beamforming in MU-MIMO systems is proposed. Embodiments of the present disclosure take practical receivers into consideration, to further mitigate the interferences sensed by terminal devices. The beamforming scheme according to embodiments of the present disclosure has many advantages. For example, embodiments of the present disclosure tackle interferences from terminal device view, to mitigate the interferences which really affect the received signals of terminal devices. Embodiments of the present disclosure do not assume that terminal devices utilize Eigen receivers but consider more practical receivers used by the terminal devices to mitigate the interferences. Embodiments of the present disclosure have high flexibility, different interference cancelling methods can be used to replace the ZF method.

公开(公告)号：US20210184752A1

公开(公告)日：2021-06-17

申请号：US16771154

申请日：2017-12-28

Applicant: Nokia Solutions and Networks Oy

Inventor： Zhijun LIAO ,  Liang XING ,  Junjie ZENG ,  Shenglin SHI

IPC: H04B7/08 ,  H04B7/0413 ,  H04B7/06 ,  H04L25/02

Abstract: Embodiments of the present disclosure relate to methods and apparatuses for signal detection in a MIMO communication system. A receiver device according to an embodiment of the present disclosure comprises a remote unit and a baseband unit. The remote radio unit is configured to receive a first set of signals from a first number of receiving antennas, and the baseband unit comprises: an interfacing unit, configured to obtain the first set of signals from the remote radio unit; a beamforming unit, configured to generate a second set of signals associated with a second number of virtual antennas by performing receiving beamforming for the obtained first set of signals, the second number being less than the first number; and a detecting unit, configured to detect the second set of signals generated by the beamforming unit. Embodiments of the present disclosure may reduce complexity of signal detection and cost of implementation.