Frequency domain dimension reduction for channel state feedback

A user equipment (UE) for wireless communication, comprising:

• a memory;
• and
• one or more processors coupled to the memory, the one or more processors configured to:
• receive, from a base station, a channel state information reference signal that includes a plurality of resource blocks;
• sub-sample one or more portions of the plurality of resource blocks, prior to performing one or more channel state feedback computations, to identify one or more sub-sampled portions of the plurality of resource blocks, wherein the one or more sub-sampled portions comprises fewer resource blocks than the plurality of resource blocks received from the base station;
• perform the one or more channel state feedback computations based at least in part on the one or more sub-sampled portions of the plurality of resource blocks;
• and
• transmit, to the base station, a channel state feedback report based at least in part on the one or more channel state feedback computations that are performed based at least in part on the one or more sub-sampled portions of the plurality of resource blocks.

A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:

• one or more instructions that, when executed by one or more processors of a user equipment, cause the one or more processors to:
• receive, from a base station, a channel state information reference signal that includes a plurality of resource blocks;
• sub-sample one or more portions of the plurality of resource blocks, prior to performing one or more channel state feedback computations, to identify one or more sub-sampled portions of the plurality of resource blocks, wherein the one or more sub-sampled portions comprises fewer resource blocks than the plurality of resource blocks received from the base station;
• perform the one or more channel state feedback computations based at least in part on the one or more sub-sampled portions of the plurality of resource blocks;
• and
• transmit, to the base station, a channel state feedback report based at least in part on the one or more channel state feedback computations that are performed using based at least in part on the one or more sub-sampled portions of the plurality of resource blocks.

An apparatus for wireless communication, comprising:

• means for receiving, from a base station, a channel state information reference signal that includes a plurality of resource blocks;
• means for sub-sampling one or more portions of the plurality of resource blocks, prior to performing one or more channel state feedback computations, to identify one or more sub-sampled portions of the plurality of resource blocks, wherein the one or more sub-sampled portions comprises fewer resource blocks than the plurality of resource blocks received from the base station;
• means for performing the one or more channel state feedback computations based at least in part on the one or more sub-sampled portions of the plurality of resource blocks;
• and
• means for transmitting, to the base station, a channel state feedback report based at least in part on the one or more channel state feedback computations that are performed based at least in part on the one or more sub-sampled portions of the plurality of resource blocks.