Huawei Technologies Co., Limited

Guochen Liu

Quanzhong Gao

Heng Xu

Hui Huang

Yong Qing Wang

Senbao Guo

Liwen Zhang

Chaoyi Yan

Jianbiao Xu

Xiangyang Liu

Jian Min

Liwei Ge

Xitao Dai

Jiesheng Huang

Guichun Zhuang

Yong Wang

An uplink signal transmission method includes receiving, by an active antenna unit of a base station, a first uplink signal sent by a terminal in a first band. The method also includes sending, by the base station, the first uplink signal to a first baseband processing unit of the base station corresponding to a second band for demodulation. The active antenna unit of the base station includes a first array antenna corresponding to the first band and a second array antenna corresponding to the second band. The first band is lower than the second band.

Uplink signal transmission method and system, and base station

This application provides example data dimension reduction methods, apparatus, and systems, computer devices, and storage mediums, and relates to the communications field. One example method includes receiving an antenna domain received signal, where the antenna domain received signal includes an uplink signal that is received from UE by an array antenna corresponding to an RRS, wherein the antenna domain received signal is a time domain signal, a dimension of the antenna domain received signal is N, and Nis an integer greater than 1. A received beam weight is obtained based on channel information of the UE. Dimension reduction is performed on the antenna domain received signal by using the received beam weight to obtain a beam domain received signal, where the beam domain received signal is a frequency domain signal, a dimension of the beam domain received signal is N, and 0 &#x3c;N&#x3c;N.

Data dimension reduction method, apparatus, and system, computer device, and storage medium

A method for calibrating a channel between radio remote unit (RRUs) includes: for each subcarrier in M subcarriers in full bandwidth, instructing, by a baseband unit (BBU), a reference RRU to transceive a calibration signal on the subcarrier by using a reference channel and a preset channel in a preset RRU, and calculating a calibration coefficient; and determining a first correspondence according to M calibration coefficients obtained by means of calculation, where the first correspondence includes a correspondence between a frequency of each subcarrier and the calibration coefficient on the subcarrier, 2&#x2264;M&#x3c;N, N is a total quantity of subcarriers in the full bandwidth, and both M and N are integers.

Method and apparatus for calibrating channel between radio remote units RRUs

Embodiments of this application provide an antenna calibration method and apparatus. In the method, for a first antenna unit and a second antenna unit, candidate phase compensation coefficients used for antenna calibration are determined based on channel responses indicating that a first calibration signal sent by the first antenna unit is received by the first antenna unit and the second antenna unit and channel responses indicating that a second calibration signal sent by the second antenna unit is received by the first antenna unit and the second antenna unit; and a phase compensation coefficient is selected from the candidate phase compensation coefficients based on measurement on an uplink signal sent by user equipment.

Antenna calibration method and apparatus

Growing community of inventors

Shenzhen, China

Guochen Liu