US 12,143,178 B2
Method of signal processing by a massive MIMO base station receiver
Kiran Kumar Kuchi, Hyderabad (IN); and Saidhiraj Amuru, Sangareddy (IN)
Assigned to WISIG NETWORKS PRIVATE LIMITED, (IN)
Filed by WISIG NETWORKS PRIVATE LIMITED, Hyderabad (IN)
Filed on Aug. 2, 2023, as Appl. No. 18/229,214.
Application 18/229,214 is a continuation of application No. 17/900,101, filed on Aug. 31, 2022.
Application 17/900,101 is a continuation of application No. 17/495,013, filed on Oct. 6, 2021, granted, now 11,489,568, issued on Nov. 1, 2022.
Claims priority of application No. 202041046686 (IN), filed on Oct. 26, 2020.
Prior Publication US 2023/0379022 A1, Nov. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 5/12 (2006.01); H04B 7/0456 (2017.01); H04B 7/06 (2006.01)
CPC H04B 7/0473 (2013.01) [H04B 7/0626 (2013.01); H04B 7/0639 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A massive multiple input multiple output (MIMO) base station (BS) comprising:
a plurality of antennas,
at least one radio unit (RU),
at least one distributed unit (DU), and
an interface configured for communication between the at least one RU and the at least one DU, wherein:
the at least one RU is configured to receive a plurality of signals corresponding to the plurality of antennas,
the plurality of signals comprises at least one of data signals, demodulation reference signals (DMRS) and sounding reference signals (SRS),
the at least one RU is configured to group a subset of the plurality of signals to generate a plurality of signal groups,
each signal group comprises at least one of the data signals, the DMRS and the SRS;
the at least one RU is configured to perform a first stage filtering on the plurality of signal groups using one or more group specific filters to generate one or more group specific filtered signals,
the group specific filters are determined according to at least one of the signals associated with each signal group and a set of values communicated by the at least one DU to the at least one RU,
the set of values is determined by the at least one DU according to the SRS or predetermined values, and
the at least one RU is configured to perform a second stage filtering on the one or more group specific filtered signals to generate one or more second stage filtered signals.