US 11,901,987 B2
System and method for beam directional nulling for SRS-based data beams
Shiyang Leng, Allen, TX (US); Hao Chen, Plano, TX (US); Namjeong Lee, Suwon-si (KR); and Sooyoung Hur, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Apr. 5, 2022, as Appl. No. 17/658,011.
Claims priority of provisional application 63/251,923, filed on Oct. 4, 2021.
Claims priority of provisional application 63/227,721, filed on Jul. 30, 2021.
Prior Publication US 2023/0052415 A1, Feb. 16, 2023
Int. Cl. H04B 7/06 (2006.01); H04L 5/00 (2006.01)
CPC H04B 7/0617 (2013.01) [H04B 7/0634 (2013.01); H04L 5/0048 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A base station (BS) in a wireless communication system, the BS comprising:
a processor configured to:
configure a data beam to be transmitted to a user equipment (UE) to have a null area in a direction of a satellite earth station (ES), the null area defining a space within a coverage area of the data beam in which a signal from the data beam is suppressed, wherein to configure the data beam, the processor is further configured to:
generate a steering vector to the ES;
obtain a UE channel matrix via a sounding reference signal (SRS);
determine a rank value;
determine a beamforming vector based on increasing a received signal power at the UE without exceeding a power leakage constraint in the direction of the ES, wherein the power leakage constraint is a function of (i) a threshold parameter associated with a nulling level in the direction of the ES and (ii) the steering vector to the ES; and
generate, based on the beamforming vector, a beamforming precoder configured to directional null the data beam in the direction of the ES; and
a transceiver operably coupled with the processor, the transceiver configured to transmit the generated data beam to the UE.