US 12,335,067 B2
Method and apparatus for channel prediction for 5G uplink/downlink massive MIMO system for open Radio Access Networks
Karthik Muralidhar, Bengaluru (IN); and Logeshwaran Vijayan, Bangalore (IN)
Assigned to Mavenir Systems, Inc., Richardson, TX (US)
Filed by Mavenir Systems, Inc., Richardson, TX (US)
Filed on Sep. 8, 2022, as Appl. No. 17/940,128.
Claims priority of application No. 202121041904 (IN), filed on Sep. 16, 2021.
Prior Publication US 2023/0078276 A1, Mar. 16, 2023
Int. Cl. H04L 25/02 (2006.01); H04B 7/0417 (2017.01); H04B 7/0456 (2017.01); H04B 7/06 (2006.01)
CPC H04L 25/0224 (2013.01) [H04B 7/0456 (2013.01); H04B 7/0639 (2013.01); H04L 25/025 (2013.01); H04B 7/0417 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method of linear channel prediction (LCP) in an Open Radio Access Network (O-RAN) massive Multiple Input Multiple Output (MIMO) system, comprising:
predicting a channel associated with a target uplink (UL) slot to be decoded, wherein said predicting is performed based on at least one previous SRS symbol, and wherein said predicting comprises: i) training for predicting a channel between two periodic SRS symbols; and ii) decoding the target UL slot using a combining matrix based on a predicted channel corresponding to the target UL slot located between slots containing the two periodic SRS symbols;
using the predicted channel as a basis for a combining matrix to be applied in a radio unit (RU) for decoding the target UL slot;
prior to the training for predicting, sampling a channel between two periodic SRS symbols for reconstructing the channel between two periodic SRS symbols, wherein fractional delay infinite impulse response (IIR) filter is used for reconstructing the channel between two periodic SRS symbols.