Method and apparatus for transmitting and receiving uplink reference signal in wireless communication systems

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver;
• wherein the at least one processor is configured to:
• identify that a transform precoding is enabled based on first information received from a base station,
• identify whether to enable pi/2 binary phase shift keying (BPSK) modulation with the transform precoding based on second information received from the base station,
• identify whether to apply the pi/2 BPSK modulation to a first demodulation reference signal (DMRS) for a physical uplink control channel (PUSCH) based on the second information and third information received from the base station, and
• transmit, to the base station, the first DMRS for the PUSCH using a first sequence generated based on the first information, the second information, and the third information, and
• wherein the first sequence is generated, in case that the transform precoding is enabled, the pi/2 BPSK modulation is used for the PUSCH, and the pi/2 BPSK modulation is applied to the first DMRS for the PUSCH.

A method performed by a base station in a wireless communication system, the method comprising:

• transmitting, to a terminal, first information indicating that a transform precoding is enabled;
• transmitting, to the terminal, second information indicating whether to enable pi/2 binary phase shift keying (BPSK) modulation with the transform precoding;
• transmitting, to the terminal, third information indicating whether to apply the pi/2 BPSK modulation to a first demodulation reference signal (DMRS) for a physical uplink control channel (PUSCH);
• and
• receiving the first DMRS for the PUSCH using a first sequence generated based on the first information, the second information, and the third information,
• wherein the first sequence is generated, in case that the transform precoding is enabled, the pi/2 BPSK modulation is used for the PUSCH, and the pi/2 BPSK modulation is applied to the first DMRS for the PUSCH.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver;
• wherein the at least one processor is configured to:
• transmit, to a terminal, first information indicating that a transform precoding is enabled,
• transmit, to the terminal, second information indicating whether to enable pi/2 binary phase shift keying (BPSK) modulation with the transform precoding,
• transmit, to the terminal, third information indicating whether to apply the pi/2 BPSK modulation to a first demodulation reference signal (DMRS) for a physical uplink control channel (PUSCH), and
• receive the first DMRS for the PUSCH using a first sequence generated based on the first information, the second information, and the third information, and
• wherein the first sequence is generated, in case that the transform precoding is enabled, the pi/2 BPSK modulation is used for the PUSCH, and the pi/2 BPSK modulation is applied to the first DMRS for the PUSCH.