Patent ID: 11963230
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A user equipment (UE) configured to transmit and receive signals in a wireless communication system comprising:
at least one transceiver;
at least one processor; and
at least one memory operatively connected to the at least one processor, and configured to store instructions such that the at least one processor performs specific operations by executing the instructions,
wherein the specific operations include:
transmitting a physical random access channel (PRACH); and
receiving a random access response (RAR) based on the PRACH,
wherein
the PRACH includes N_MAX sequences mapped to a frequency domain,
wherein
the N_MAX sequences construct M groups each including N sequences, and the N_MAX sequences have the same length; and
the N_MAX sequences are generated based on the same base sequence, different cyclic shift (CS) values are applied to the N sequences, and the pattern of the different CS values is equally applied to the M groups;
a phase shift (PS) value is separately applied to each of the N MAX sequences, wherein:
the N_MAX value is set to 4;
from among the N_MAX sequences,
the CS value of ‘0’ and the PS value of ‘0’ are applied to a first sequence, the CS value corresponding to 1 sample and the PS value of ‘0+1i’ are applied to a second sequence, the CS value of ‘0’ and the PS value of ‘0+1i’ are applied to a third sequence, and the CS value corresponding to 1 sample and the PS value of ‘0’ are applied to a fourth sequence;
the CS value of ‘0’ and the PS value of ‘0’ are applied to the first sequence, the CS value of ‘0’ and the PS value of ‘0-1i’ are applied to the second sequence, the CS value corresponding to 1 sample and the PS value of ‘0’ are applied to the third sequence, and the CS value corresponding to 1 sample and the PS value of ‘0+1i’ are applied to the fourth sequence; and
the CS value of ‘0’ and the PS value of ‘0’ are applied to the first sequence, the CS value corresponding to 1 sample and the PS value of ‘−1’ are applied to the second sequence, the CS value of ‘0’ and the PS value of ‘0-1i’ are applied to the third sequence, and the CS value corresponding to 1 sample and the PS value of ‘0-1i’ are applied to the fourth sequence.