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

Claim 0:
1. A 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 for transmitting a respective downlink transmission signal from the central unit to a respective antenna of the plurality of antennas of the RRU,
wherein the RRU is configured to provide a respective uplink feedback signal via an uplink feedback channel to the central unit for reducing non-linear distortions of the respective downlink transmission signal, wherein the respective uplink feedback signal is based on the respective downlink transmission signal,

the RRU comprising a coupler configured to couple, selectively, the respective downlink transmission channels with the uplink feedback channel for providing the respective uplink feedback signal via the uplink feedback channel to the central unit.