US 11,985,021 B2
Phase tracking reference signal for multi-transmit/receive points
Mostafa Khoshnevisan, San Diego, CA (US); Xiaoxia Zhang, San Diego, CA (US); Peter Gaal, San Diego, CA (US); Tao Luo, San Diego, CA (US); Jing Sun, San Diego, CA (US); Tae Min Kim, San Diego, CA (US); and Arumugam Chendamarai Kannan, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Oct. 2, 2020, as Appl. No. 17/062,265.
Claims priority of provisional application 62/911,086, filed on Oct. 4, 2019.
Prior Publication US 2021/0105120 A1, Apr. 8, 2021
Int. Cl. H04L 27/26 (2006.01); H04L 5/00 (2006.01); H04L 5/10 (2006.01); H04W 8/24 (2009.01); H04W 72/23 (2023.01); H04W 72/53 (2023.01)
CPC H04L 27/2675 (2013.01) [H04L 5/0048 (2013.01); H04L 5/0051 (2013.01); H04L 5/10 (2013.01); H04L 27/2613 (2013.01); H04W 8/24 (2013.01); H04W 72/23 (2023.01); H04W 72/53 (2023.01)] 24 Claims
OG exemplary drawing
 
1. A method of wireless communication at a user equipment (UE), comprising:
receiving downlink control information (DCI), a DCI field of the DCI indicating two transmission configuration indication (TCI) states for a PDSCH;
determining frequency division multiplexing (FDM) is to be used for the PDSCH, and a phase tracking reference signal (PT-RS) present in the PDSCH;
determining a PT-RS density in a frequency domain based on the two TCI states and based on determining that FDM is to be used for the PDSCH;
determining first resource elements for the PT-RS based on a first set of resource blocks (RBs) for a first TCI state; and
determining second resource elements for the PT-RS based on a second set of RBs for a second TCI state;
wherein determining the PT-RS density in the frequency domain comprises determining a first PT-RS density in the frequency domain that is based on a first number of allocated RBs for the first set of RBs and determining a second PT-RS density in the frequency domain that is based on a second number of allocated RBs for the second set of RBs, wherein the first resource elements are determined using the first PT-RS density and the second resource elements are determined using the second PT-RS density.