US 12,348,352 B2
Method and apparatus for radio signal transmission and reception in communication system
Kapseok Chang, Daejeon (KR); Yong Sun Kim, Daejeon (KR); Won Cheol Cho, Daejeon (KR); and Young-Jo Ko, Daejeon (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed on Dec. 14, 2022, as Appl. No. 18/080,909.
Claims priority of application No. 10-2021-0180113 (KR), filed on Dec. 15, 2021; and application No. 10-2022-0174509 (KR), filed on Dec. 14, 2022.
Prior Publication US 2023/0188405 A1, Jun. 15, 2023
Int. Cl. H04L 27/36 (2006.01); H04L 27/34 (2006.01)
CPC H04L 27/362 (2013.01) [H04L 27/3444 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An operation method of a first communication node in a communication system, the operation method comprising:
generating a base sequence;
performing a quadrature phase shift keying (QPSK) operation on the base sequence;
generating a first signal sequence by performing a rotational transform operation by a first angle on a complex plane with respect to a result of the QPSK operation;
modulating the first signal sequence to generate first modulation symbols; and
transmitting a first signal composed of the first modulation symbols to a second communication node,
wherein each of a plurality of elements constituting the first signal sequence has a real value or a pure imaginary value,
wherein the first angle is one of π/4, −π/4, 3π/4, or −3π/4,
wherein the generating of the base sequence comprises:
generating first and second binary sequences that are binary pseudo noise (PN) sequences;
performing an element-wise exclusive-OR (XOR) operation on the first and second binary sequences; and
obtaining the base sequence corresponding to a result of the element-wise XOR operation.