公开(公告)号：US20210083772A1

公开(公告)日：2021-03-18

申请号：US17105304

申请日：2020-11-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hongqiang BAO ,  Ganghua YANG ,  Zhipeng ZHAO ,  Huijian ZHANG ,  Ramin KHAYATZADEH

IPC: H04B10/2575 ,  H04B10/40 ,  H04B10/58 ,  H04W88/08

Abstract: A remote radio unit is for a base transceiver station. The remote radio unit includes: a noise generator configured to provide a RF noise signal having predefined statistical properties; a communication interface configured to transmit the RF noise signal as a stimulus signal over a radio-over-fiber uplink channel between the remote radio unit and a central unit of the base transceiver station for determining a pre-distortion of a target signal to be transmitted by the remote radio unit. The communication interface is further configured to receive the pre-distorted target signal over a ROF downlink channel between the remote radio unit and the central unit of the base transceiver station. The remote radio unit also has an antenna for transmitting the pre-distorted target signal received by the communication interface.

公开(公告)号：US20210314065A1

公开(公告)日：2021-10-07

申请号：US17353461

申请日：2021-06-21

Applicant: Hongqiang BAO ,  HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hongqiang BAO ,  Zhipeng ZHAO ,  Ramin KHAYATZADEH ,  Ganghua YANG

IPC: H04B10/2507 ,  H04B10/2575 ,  H04W88/08 ,  H04W72/04

Abstract: This application provides an example base station for an example wireless communication network and an example method. One example base station includes a central unit and a remote radio unit (RRU). The RRU includes one or more antennas. The RRU is coupled to the central unit via one or more optical transmission fibers. Each optical transmission fiber defines a respective downlink transmission channel for transmitting a respective downlink transmission signal from the central unit to the respective antenna of the RRU. The RRU is configured to provide a respective uplink feedback signal based on the respective downlink transmission signal via an uplink feedback channel to the central unit.