US 12,074,749 B2
Method for reference signal generation and communications device
Xiaodong Sun, Chang'an Dongguan (CN); Hao Liu, Chang'an Dongguan (CN); and Peng Sun, Chang'an Dongguan (CN)
Assigned to VIVO MOBILE COMMUNICATION CO., LTD., Guangdong (CN)
Filed by VIVO MOBILE COMMUNICATION CO., LTD., Chang'an Dongguan (CN)
Filed on Aug. 16, 2021, as Appl. No. 17/403,218.
Application 17/403,218 is a continuation of application No. PCT/CN2020/075028, filed on Feb. 13, 2020.
Claims priority of application No. 201910117787.2 (CN), filed on Feb. 15, 2019.
Prior Publication US 2021/0377087 A1, Dec. 2, 2021
Int. Cl. H04L 27/26 (2006.01); H04L 5/00 (2006.01)
CPC H04L 27/2613 (2013.01) [H04L 5/0048 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for reference signal generation, applied to a first communications device and comprising:
in a case that indication information is received from a second communications device, performing first modulation and then discrete Fourier transform modulation on at least one of target-reference-signal sequences to generate a target reference signal; wherein
the first modulation comprises any one of the following: π/2-binary phase shift keying (BPSK) modulation and 8-phase shift keying (PSK) modulation, and the indication information is used to indicate that the first communications device uses the target reference signal for transmission;
in a case that the number of subcarriers occupied by the target reference signal is 6, the target-reference-signal sequence comprises at least one of the following sequences to reduce at least one of an average value of a shift auto-correlation, a value of a peak-to-average power ratio (PAPR), or an average value of a cross-correlation to be less than a threshold:
5, −7, 7, 1, 5, 1;
−3, 7, −5, −1, −5, −1; or
5, 7, −3, −5, 5, −5.