Precoder selection for minimizing impact of cyclic shift port virtualization on communication performance in joint communication and sensing

A method of joint communication and sensing of a target obstacle, comprising:

• deploying an integrated sensing and communication (ISAC) node, comprising an ISAC transmitter having M transmitting antenna(s) and a radar receiver having L receiving antenna(s), wherein the M and L are integers;
• transmitting radio frequency (RF) signals carrying data to a communication receiver by the M transmitting antenna(s) of the ISAC transmitter;
• receiving radio frequency (RF) signals reflected by the target obstacle by the L receiving antenna(s);
• obtaining a sensing result based on the reflected radio frequency (RF) signals;
• and
• obtaining a transmit precoder matrix indicator (TPMI) index based on a downlink feedback signal sent by the communication receiver;
• wherein the RF signals transmitted by the M transmitting antenna(s) of the ISAC transmitter are applied with cyclic shift diversity;
• and
• wherein the RF signals transmitted by the M transmitting antenna(s) of the ISAC transmitter contain precoders which are selected based on the TPMI index to minimize the impact of cyclic shift port virtualization on communication performance caused by the cyclic shift diversity.

An integrated sensing and communication (ISAC) node, comprising:

• an ISAC transmitter having M transmitting antenna(s) for transmitting radio frequency (RF) signals carrying data to a communication receiver;
• and
• a radar receiver having L receiving antenna(s) for receiving radio frequency (RF) signals reflected by a target obstacle;
• wherein the M and L are integers;
• and
• wherein the ISAC node estimates a channel condition of a communication channel between the ISAC node and the communication receiver;
• and
• wherein the RF signals transmitted by the M transmitting antenna(s) are applied with cyclic shift diversity and contain precoders which are selected to minimize the impact of cyclic shift port virtualization on communication performance caused by the cyclic shift diversity.