US 12,259,456 B2
System and method for determining line of sight (LOS)
George Calcev, Hoffman Estates, IL (US); Philippe Sartori, Plainfield, IL (US); and Weimin Xiao, Hoffman Estates, IL (US)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Mar. 11, 2021, as Appl. No. 17/198,934.
Application 17/198,934 is a continuation of application No. PCT/US2019/046782, filed on Aug. 16, 2019.
Claims priority of provisional application 62/746,472, filed on Oct. 16, 2018.
Claims priority of provisional application 62/738,845, filed on Sep. 28, 2018.
Prior Publication US 2021/0239783 A1, Aug. 5, 2021
Int. Cl. G01S 5/02 (2010.01); G01S 11/08 (2006.01); H04B 7/10 (2017.01)
CPC G01S 11/08 (2013.01) [G01S 5/0215 (2013.01); H04B 7/10 (2013.01)] 38 Claims
OG exemplary drawing
 
1. A method performed by a first device, the method comprising:
communicating, by the first device, with a second device, a line of sight (LOS) determination request including a dual polarization procedure indicator, the dual polarization procedure indicator indicating a dual polarization procedure is to be used in LOS characterization of a transmission between the first device and the second device after the communicating the LOS determination request; and
based on the dual polarization procedure indicator:
measuring, by the first device, a first signal received from the second device on a first resource of a channel, the first signal transmitted using a first polarization;
measuring, by the first device, a second signal received from the second device on a second resource of the channel;
determining, by the first device, the LOS characterization of the transmission based on the measuring the first signal and the measuring the second signal, the second signal transmitted using a second polarization, the first signal comprising a first copy of a bit sequence, the second signal comprising a second copy of the bit sequence, the first polarization and the second polarization being orthogonal polarizations, the first signal and the second signal multiplexed in a frequency domain or a code domain; and
communicating, by the first device, with the second device, a characterization indication,
wherein the characterization indication is one of multiple values communicated by the first device with the second device showing likelihood or confidence of estimation of the transmission comprising an LOS transmission or a non-LOS (NLOS) transmission.