US 11,817,924 B1
Transmission precoding matrix indicator grouping and designs for uplink multi-layer transmissions
Gokul Sridharan, Sunnyvale, CA (US); Yi Huang, San Diego, CA (US); Hyojin Lee, San Diego, CA (US); and Yu Zhang, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on May 9, 2022, as Appl. No. 17/740,297.
Int. Cl. H04B 7/0456 (2017.01); H04W 72/23 (2023.01)
CPC H04B 7/0456 (2013.01) [H04W 72/23 (2023.01)] 30 Claims
OG exemplary drawing
 
1. An apparatus for wireless communications at a user equipment (UE), comprising:
a processor;
memory coupled with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
transmit capability information indicating transmission coherence information of the UE, the transmission coherence information associated with a capability of the UE to transmit multiple layers per antenna port at the UE;
receive a downlink control information message comprising an index value associated with a transmission precoding matrix indicator of a plurality of transmission precoding matrix indicators, wherein each transmission precoding matrix indicator of the plurality of transmission precoding matrix indicators is associated with a quantity of antenna ports and a quantity of transmission layers per antenna port at the UE, the transmission precoding matrix indicator satisfying the transmission coherence information; and
transmit an uplink message based at least in part on the transmission precoding matrix indicator and according to the transmission coherence information.