US 12,476,678 B2
Downlink multiple input multiple output enhancements for single-cell with remote radio heads
Eko Onggosanusi, Allen, TX (US); Vikram Chandrasekhar, Mountain View, CA (US); and Runhua Chen, Plano, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Sep. 27, 2023, as Appl. No. 18/373,640.
Application 18/373,640 is a continuation of application No. 17/385,875, filed on Jul. 26, 2021, granted, now 11,777,565.
Application 17/385,875 is a continuation of application No. 15/955,513, filed on Apr. 17, 2018, granted, now 11,088,740, issued on Aug. 10, 2021.
Application 17/385,875 is a continuation of application No. 15/955,501, filed on Apr. 17, 2018, granted, now 11,075,675, issued on Jul. 27, 2021.
Application 15/955,513 is a continuation of application No. 14/613,176, filed on Feb. 3, 2015, granted, now 10,033,447, issued on Jul. 24, 2018.
Application 15/955,501 is a continuation of application No. 14/613,176, filed on Feb. 3, 2015, granted, now 10,033,447, issued on Jul. 24, 2018.
Application 14/613,176 is a continuation of application No. 13/451,718, filed on Apr. 20, 2012, granted, now 8,948,293, issued on Feb. 3, 2015.
Claims priority of provisional application 61/477,341, filed on Apr. 20, 2011.
Prior Publication US 2024/0022295 A1, Jan. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/0456 (2017.01); H04B 7/024 (2017.01); H04B 7/0452 (2017.01); H04B 7/06 (2006.01); H04W 72/23 (2023.01); H04B 7/0413 (2017.01); H04B 7/10 (2017.01)
CPC H04B 7/0469 (2013.01) [H04B 7/024 (2013.01); H04B 7/0452 (2013.01); H04B 7/0691 (2013.01); H04W 72/23 (2023.01); H04B 7/0413 (2013.01); H04B 7/0665 (2013.01); H04B 7/10 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of wireless communication between a base station having a plurality of geographically separated antennas and a plurality of user equipment, the method comprising:
selecting, at the base station, a subset of at least one geographically separated antenna of the plurality of geographically separated antennas for each of the plurality of user equipment;
determining whether to signal the selected subset to a user equipment (UE) based on a Doppler of the UE;
forming at least one layer of data stream for each user equipment, each of the at least one layer of data stream including modulated symbols;
precoding the at least one layer of data stream for each user equipment via multiplication with a NT-by-N precoding matrix where N is the number of layers and NT is the number of transmit antenna elements; and
transmitting the precoded at least one layer of data stream to each user equipment via the selected subset of at least one geographically separated antenna.