Patent ID: 11909441
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A method of operating a base station for a wireless communication network, the base station comprising: a central unit; and a remote radio unit (RRU) comprising a plurality of antennas, wherein the RRU is coupled to the central unit via a plurality of optical transmission fibers, wherein each optical transmission fiber of the plurality of optical transmission fibers defines a respective downlink transmission channel, the RRU comprising a coupler configured to couple, selectively, the respective downlink transmission channels with the uplink feedback channel,
wherein the method comprises:
transmitting a respective downlink transmission signal from a respective one of the downlink transmission channels to a respective antenna of the plurality of antennas of the RRU;
selectively coupling, via the coupler, the respective one of the downlink transmission channels with the uplink feedback channel; and
providing a respective uplink feedback signal based on the respective downlink transmission signal via the uplink feedback channel to the central unit for reducing non-linear distortions of the respective downlink transmission signal.