US 12,308,908 B2
Uplink multi-user multiple-input-multiple-output (MU-MIMO) configurations
Alexei Davydov, Nizhny Novgorod (RU); Bishwarup Mondal, San Ramon, CA (US); Artyom Putilin, Kstovo (RU); and Victor Sergeev, Nizhny Novgorod (RU)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Dec. 8, 2021, as Appl. No. 17/545,688.
Prior Publication US 2023/0179269 A1, Jun. 8, 2023
Int. Cl. H04B 7/0452 (2017.01); H04B 7/0456 (2017.01); H04B 7/06 (2006.01); H04L 5/00 (2006.01)
CPC H04B 7/0452 (2013.01) [H04B 7/0456 (2013.01); H04B 7/0617 (2013.01); H04B 7/0626 (2013.01); H04L 5/0048 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for a base station configured for operation in a centralized radio access network (C-RAN), the apparatus comprising:
processing circuitry, wherein to configure the base station for multiple user, multiple-input-multiple-output (MU-MIMO) signal processing in the C-RAN, the processing circuitry is to:
determine at a baseband unit (BBU) function of the base station, a beamforming matrix based on a plurality of sounding reference signals, the plurality of sounding reference signals received from a corresponding plurality of user equipments (UEs) via a corresponding plurality of channels;
perform at a remote radio unit (RRU) function of the base station, beamforming on a plurality of uplink (UL) data streams received from the plurality of UEs, to generate a plurality of beamformed streams, the beamforming based on the beamforming matrix;
perform at the RRU function of the base station, interference suppression on the plurality of beamformed streams to generate a plurality of output data streams, the interference suppression based on non-orthogonal demodulation reference signals (DMRSs) received from the plurality of UEs; and
decode UL data using the plurality of output data streams; and
a memory coupled to the processing circuitry and configured to store the plurality of sounding reference signals.