US 12,143,323 B2
Methods and apparatus for using sounding reference signals in a MIMO system to increase channel diversity
Volkan Sevindik, Parker, CO (US)
Assigned to Charter Communications Operating, LLC, St. Louis, MO (US)
Filed by Charter Communications Operating, LLC, St. Louis, MO (US)
Filed on Aug. 17, 2021, as Appl. No. 17/404,791.
Prior Publication US 2023/0057805 A1, Feb. 23, 2023
Int. Cl. H04B 7/0413 (2017.01); H04B 7/06 (2006.01); H04L 5/00 (2006.01)
CPC H04L 5/0048 (2013.01) [H04B 7/0413 (2013.01); H04B 7/0626 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of operating a base station, the method comprising:
receiving a first Sounding Reference Signal (SRS) from a first wireless terminal on each of a plurality of antennas, said plurality of antennas including a first antenna and a second antenna;
determining, at the base station, from the received first SRS, at least a first set of SRS values, each SRS value in the first set of SRS values corresponding to a different antenna in said plurality of antennas, said SRS values including a first SRS value corresponding to a first antenna and being based on a measurement of the first SRS received on the first antenna;
assigning one or more of the determined SRS values to antennas, in said plurality of antennas, to which the one or more of the determined SRS values do not correspond, said assigning including assigning the first SRS value to the second antenna, said second antenna being a different antenna from said first antenna;
adjusting transmitter control values corresponding to different antennas based on the assigned SRS values, said adjusting transmitter control values including adjusting a first transmitter control value used to control transmission from the second antenna based on the assigned first SRS value; and
transmitting a signal from said plurality of antennas to the first wireless terminal using the adjusted transmitter control values to control transmission from one or more of said plurality of antennas, said one or more of said plurality of antennas including said second antenna.