Method and apparatus for transmitting and receiving a signal

1 . A method performed by a first node in a wireless communication system, the method comprising:

generating a first physical signal and a second physical signal; and

generating a first baseband signal on a first time unit based on the first physical signal and a second baseband signal on a second time unit based on the second physical signal,

wherein the first baseband signal comprises a first part in which the first physical signal is leftward cyclic shifted by a length of a first cyclic prefix and the first cyclic prefix which is appended to a head of the first part,

wherein the second baseband signal comprises a second part and a second cyclic prefix which is appended to a head of the second part, and

wherein a third part comprising a part of the first part of the first baseband signal and the second cyclic prefix of the second baseband signal is configured as a cyclic prefix for the second part of the second baseband signal which is used for joint communication and sensing (JCAS).

2 . The method of claim 1 , wherein the third part and the second part of the second baseband signal are identical to each other.

3 . The method of claim 2 , further comprising:

performing a first inverse Fourier transform on the first physical signal to obtain the first baseband signal; and

performing a second inverse Fourier transform on the second physical signal to obtain the second baseband signal.

4 . The method of claim 1 , wherein generating the first physical signal and the second physical signal further comprises mapping a first sequence and a second sequence to time-frequency domain resources to obtain the first physical signal and the second physical signal, respectively; and

wherein mapping the first sequence and the second sequence to time-frequency domain resources comprises mapping the first sequence and the second sequence based on at least one of different subcarriers or different cyclic shifts.

5 . The method of claim 4 , wherein each of subcarriers is determined based on an offset including a range of value between zero and a number of ports −1.

6 . The method of claim 1 , wherein each of the first physical signal and the second physical signal corresponds to at least one port and is mapped to different subcarriers or to a same subcarrier with different cyclic shifts.

7 . The method of claim 1 , wherein each of the first time unit and the second time unit is one orthogonal frequency division multiplexing (OFDM) symbol, respectively.

8 . The method of claim 7 , wherein the first time unit and the second time unit is contiguous in a time domain.

9 . A first node in a wireless communication system, the first node comprising:

a transceiver; and

a controller coupled with the transceiver and configured to:

generate a first physical signal and a second physical signal, and

generate a first baseband signal on a first time unit based on the first physical signal and a second baseband signal on a second time unit based on the second physical signal,

wherein the first baseband signal comprises a first part in which the first physical signal is leftward cyclic shifted by a length of a first cyclic prefix and the first cyclic prefix which is appended to a head of the first part,

wherein the second baseband signal comprises a second part and a second cyclic prefix which is appended to a head of the second part, and

wherein a third part comprising a part of the first part of the first baseband signal and the second cyclic prefix of the second baseband signal is configured as a cyclic prefix for the second part of the second baseband signal which is used for joint communication and sensing (JCAS).

10 . The first node of claim 9 , wherein the third part and the second part of the second baseband signal are identical to each other.

11 . The first node of claim 10 , the controller is further configured to:

perform a first inverse Fourier transform on the first physical signal to obtain the first baseband signal; and

perform a second inverse Fourier transform on the second physical signal to obtain the second baseband signal.

12 . The first node of claim 9 , wherein, for generating the first physical signal and the second physical signal, the controller is further configured to:

map a first sequence and a second sequence to time-frequency domain resources to obtain the first physical signal and the second physical signal, respectively; and

for mapping the first sequence and the second sequence to time-frequency domain resources, map the first sequence and the second sequence based on at least one of different subcarriers or different cyclic shifts.

13 . The first node of claim 12 , wherein each of subcarriers is determined based on an offset including a range of value between zero and a number of ports −1.

14 . The first node of claim 9 , wherein each of the first physical signal and the second physical signal corresponds to at least one port and is mapped to different subcarriers or to a same subcarrier with different cyclic shifts.

15 . The first node of claim 9 , wherein each of the first time unit and the second time unit is one orthogonal frequency division multiplexing (OFDM) symbol.

16 . The first node of claim 15 , wherein the first time unit and the second time unit is contiguous in a time domain.