US 11,658,780 B2
Demodulation reference signal multiplexing scheme selection for uplink transmission
Wei Yang, San Diego, CA (US); Yi Huang, San Diego, CA (US); Wanshi Chen, San Diego, CA (US); Peter Gaal, San Diego, CA (US); Seyedkianoush Hosseini, San Diego, CA (US); and Xiao Feng Wang, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jan. 6, 2020, as Appl. No. 16/735,402.
Claims priority of provisional application 62/790,426, filed on Jan. 9, 2019.
Prior Publication US 2020/0220681 A1, Jul. 9, 2020
Int. Cl. H04L 5/00 (2006.01); H04L 5/02 (2006.01)
CPC H04L 5/0048 (2013.01) [H04L 5/001 (2013.01); H04L 5/0037 (2013.01); H04L 5/026 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A method for wireless communication by a user equipment (UE), comprising:
receiving a first index assigned to the UE of a plurality of different indexes;
monitoring for a parameter that is distinct from the first index, the parameter indicating a single demodulation reference signal scheme of a plurality of available demodulation reference signal schemes for the UE to apply, the plurality of available demodulation reference signal schemes comprising a first demodulation reference signal scheme comprising an intra-symbol time domain orthogonal cover code scheme and a second demodulation reference signal scheme comprising a time domain cyclic shift scheme;
receiving, based at least in part on the monitoring, the parameter indicating for the UE to use the first demodulation reference signal scheme;
generating a transmission based at least in part on a π/2 binary phase shift keying modulation scheme; and
transmitting, based at least in part on the first demodulation reference signal scheme, the transmission comprising a first demodulation reference signal generated using a first intra-symbol time domain orthogonal cover code in a first demodulation reference signal symbol period and a second demodulation reference signal generated using a second intra-symbol time domain orthogonal cover code in a second demodulation reference signal symbol period,
wherein the first intra-symbol time domain orthogonal cover code, of a plurality of intra-symbol time domain orthogonal cover codes, is based at least in part on a symbol index of the first demodulation reference signal symbol period, the first index, and the parameter.