Method and device for transmitting/receiving wireless signal in communication system

An operation method of a first communication node in a communication system, the operation method comprising:

• generating first and second binary sequences composed of (N/2) elements, and a third binary sequence composed of M elements;
• generating a first intermediate sequence composed of (N/2) elements based on the first to third binary sequences and a binary phase shift keying (BPSK) operation;
• generating first and second element groups each composed of (N/2) elements based on the first intermediate sequence;
• generating a first signal sequence composed of N elements based on the first and second element groups;
• mapping first modulation symbols to N subcarriers, wherein the first modulation symbols are defined by modulating the first signal sequence;
• and
• transmitting a first signal composed of the mapped first modulation symbols,
• wherein the first and second binary sequences are generated based on generator polynomials having a maximum degree of (p−1), first to third cyclic shift indexes determined based on a first identifier for the first communication node are applied to the first to third binary sequences, respectively, p is a natural number, N is a natural number having a value of (2P−2), and M is a natural number less than or equal to (N/2).

A first communication node in a communication system, comprising a processor, wherein the processor causes the first communication node to perform:

• generating first and second binary sequences composed of (N/2) elements, and a third binary sequence composed of M elements;
• generating a first intermediate sequence composed of (N/2) elements based on the first to third binary sequences and a binary phase shift keying (BPSK) operation;
• generating first and second element groups each composed of (N/2) elements based on the first intermediate sequence;
• generating a first signal sequence composed of N elements based on the first and second element groups;
• mapping first modulation symbols to N subcarriers, wherein the first modulation symbols are defined by modulating the first signal sequence;
• and
• transmitting a first signal composed of the mapped first modulation symbols,
• wherein the first and second binary sequences are generated based on generator polynomials having a maximum degree of (p−1), first to third cyclic shift indexes determined based on a first identifier for the first communication node are applied to the first to third binary sequences, respectively, p is a natural number, N is a natural number having a value of (2P−2), and M is a natural number less than or equal to (N/2).