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

Claim 13:
14. A system comprising a base station for a wireless communication network, the base station comprising:
a central unit;
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; and

one or more tangible, non-transitory, computer-readable media storing instructions that, when executed by a processor of the base station, cause operations to be performed comprising:
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.