Temporal domain precoding configuration for wireless communications

A method for wireless communications at a second network node, comprising:

• transmitting a configuration message for a report by a first network node of parameters for a temporal domain precoder, wherein the configuration message indicates one or more of a range of Doppler frequencies, a resolution associated with the range of Doppler frequencies, or a quantity of the parameters for the first network node to report;
• transmitting a plurality of reference signals;
• and
• receiving, based at least in part on transmitting the plurality of reference signals, the report comprising the parameters for the temporal domain precoder, wherein the parameters for the temporal domain precoder comprise a corresponding discrete Fourier transform vector for each quantized frequency of one or more quantized frequencies within the range of Doppler frequencies.

An apparatus for wireless communications at a first network node, comprising:

• memory;
• a transceiver;
• and
• at least one processor of the first network node, the at least one processor coupled with the memory and the transceiver, and the at least one processor configured to cause the apparatus to:
• receive, via the transceiver, a configuration message for a report by the first network node of parameters for a temporal domain precoder, wherein the configuration message indicates one or more of a range of Doppler frequencies, a resolution associated with the range of Doppler frequencies, or a quantity of the parameters for the first network node to report;
• estimate a communications channel between the first network node and a second network node based at least in part on receiving, via the transceiver, a plurality of reference signals;
• select, based at least in part on the quantity of the parameters for the first network node to report and estimating the communications channel, one or more quantized frequencies within the range of Doppler frequencies;
• determine, for each selected quantized frequency within the range of Doppler frequencies, a corresponding discrete Fourier transform vector, wherein the parameters for the temporal domain precoder comprise the corresponding discrete Fourier transform vector for each selected quantized frequency within the range of Doppler frequencies;
• and
• transmit, via the transceiver, the report comprising the parameters for the temporal domain precoder.

An apparatus for wireless communications at a second network node, comprising:

• memory;
• a transceiver;
• and
• at least one processor of the second network node, the at least one processor coupled with the memory and the transceiver, and the at least one processor configured to cause the apparatus to:
• transmit, via the transceiver, a configuration message for a report by a first network node of parameters for a temporal domain precoder, wherein the configuration message indicates one or more of a range of Doppler frequencies, a resolution associated with the range of Doppler frequencies, or a quantity of the parameters for the first network node to report;
• transmit, via the transceiver, a plurality of reference signals;
• and
• receive, via the transceiver and based at least in part on transmitting the plurality of reference signals, the report comprising the parameters for the temporal domain precoder, wherein the parameters for the temporal domain precoder comprise a corresponding discrete Fourier transform vector for each quantized frequency of one or more quantized frequencies within the range of Doppler frequencies.