US 12,074,743 B2
Reference signal generation method, reference signal detection method, and communications apparatus
Zhenyu Shi, Shanghai (CN); and Yi Wang, Shanghai (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Mar. 24, 2023, as Appl. No. 18/189,686.
Application 18/189,686 is a continuation of application No. 17/511,916, filed on Oct. 27, 2021, granted, now 11,637,729.
Application 17/511,916 is a continuation of application No. PCT/CN2020/083259, filed on Apr. 3, 2020.
Claims priority of application No. 201910351359.6 (CN), filed on Apr. 28, 2019.
Prior Publication US 2023/0239185 A1, Jul. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 27/26 (2006.01); H04L 5/00 (2006.01)
CPC H04L 27/2602 (2013.01) [H04L 5/0007 (2013.01); H04L 5/0048 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A reference signal generation method, comprising:
obtaining a reference signal sequence based on a pseudo-random sequence initial factor cinit; and
mapping the reference signal sequence to one or more orthogonal frequency-division multiplexing (OFDM) symbols;
wherein:
the pseudo-random sequence initial factor cinit is represented by 31 bits;
10 least significant bits in the 31 bits represent nID mod 1024;
21 most significant bits in the 31 bits represent (Nsymbslotns,fμ+l+1)(2(nID mod 1024)+1); and
d bits in the 21 most significant bits represent

OG Complex Work Unit Math
and a value of d is related to a maximum value of nID, wherein:
Nsymbslot represents a quantity of OFDM symbols in a slot,
└ ┘ represents rounding down,
ns,fμrepresents an index of a slot in a frame,
l represents an index of an OFDM symbol in a slot,
a value range of nID is {0, 1, . . . , 4095},
μ represents a parameter related to a subcarrier spacing, and
mod represents a modulo operation.