Method and apparatus for reporting of time-domain channel correlation properties

A base station comprising:

• a transceiver configured to:
• transmit a configuration about a channel state information (CSI) report, the configuration including information about (i) M non-zero power (NZP) CSI reference signal (RS) resources for tracking, where M≥1, (ii) a number (K) of time-domain correlation values, where K≥1, and (iii) delay values τk for k=0, 1, . . . , K−1;
• transmit the M NZP CSI-RS resources for tracking;
• and
• receive the CSI report including an indicator, for each of the K time-domain correlation values, indicating a quantized value of an amplitude of the respective K time-domain correlation value that is based on the M NZP CSI-RS resources for tracking,
• wherein a k-th correlation value is between two CSI-RS transmission occasions that are separated by one of the delay values τk.

A method performed by a user equipment (UE), the method comprising:

• receiving a configuration about a channel state information (CSI) report, the configuration including information about (i) M non-zero power (NZP) CSI reference signal (RS) resources for tracking, where M≥1, (ii) a number (K) of time-domain correlation values, where K≥1, and (iii) delay values τk for k=0, 1, . . . , K−1;
• based on the configuration:
• measuring the M NZP CSI-RS resources for tracking,
• determining, based on the measurement, the K time-domain correlation values, wherein a k-th correlation value is between two CSI-RS transmission occasions that are separated by one of the delay values τk, and
• quantizing a value for an amplitude of each of the K time-domain correlation values;
• and
• transmitting the CSI report including an indicator, for each of the K time-domain correlation values, indicating the quantized values of the amplitude.