Scaling and quantization for channel state information reporting

A method for wireless communication, comprising:

• transmitting an indication of a word size configured for a format of a channel state information report, wherein each value in a first channel state information matrix is quantized based at least in part on the word size configured for the format of the channel state information report;
• receiving, in the channel state information report, the first channel state information matrix for each subcarrier of a plurality of subcarriers of a channel;
• converting the first channel state information matrix to a second channel state information matrix based at least in part on a power-of-two value scaling each value in the first channel state information matrix;
• and
• performing radio frequency sensing based at least in part on the second channel state information matrix.

A method for wireless communication at a station (STA), comprising:

• receiving a null data packet at one or more receive antennas at the STA;
• measuring a signal strength of the null data packet received at each receive antenna of the one or more receive antennas;
• receiving a request to transmit a received signal strength indicator in a channel state information report;
• and
• transmitting, to a second device and based at least in part on receiving the request, the channel state information report comprising the received signal strength indicator for each receive antenna of the one or more receive antennas, the received signal strength indicator indicating the measured signal strength of the null data packet at a respective receive antenna.

A method for wireless communication, comprising:

• transmitting a request for a station (STA) to include a received signal strength indicator in a channel state information report;
• receiving, based at least in part on transmitting the request, the channel state information report comprising the received signal strength indicator indicating a received signal strength of a null data packet for each receive antenna of one or more receive antennas at the STA;
• and
• performing radio frequency sensing based at least in part on the received signal strength indicator in the channel state information report.

A method for wireless communication at a station (STA), comprising:

• receiving a null data packet at one or more receive antennas at the STA;
• measuring a total gain of one or more circuits at each receive antenna of the one or more receive antennas;
• and
• transmitting, to a second device, a channel state information report comprising the total gain at each receive antenna of the one or more receive antennas.

An apparatus for wireless communication at a station (STA), comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive a null data packet on a plurality of subcarriers of a channel;
• generate a channel state information matrix for each subcarrier of the plurality of subcarriers of the channel;
• scale each value in the channel state information matrix using a power-of-two value based at least in part on a determined value in the channel state information matrix, wherein each value in the channel state information matrix is scaled such that a real part and an imaginary part of each scaled value of the channel state information matrix is less than a largest positive value of a binary word having a word size configured for the channel state information matrix and greater than half of the largest positive value of the binary word;
• and
• transmit, to a second device, a channel state information report that includes the scaled values of the channel state information matrix.

An apparatus for wireless communication, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit an indication of a word size configured for a format of a channel state information report, wherein each value in a first channel state information matrix is quantized based at least in part on the word size configured for the format of the channel state information report;
• receive, in the channel state information report, the first channel state information matrix for each subcarrier of a plurality of subcarriers of a channel;
• convert the first channel state information matrix to a second channel state information matrix based at least in part on a power-of-two value scaling each value in the first channel state information matrix;
• and
• perform radio frequency sensing based at least in part on the second channel state information matrix.

An apparatus for wireless communication at a station (STA), comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive a null data packet at one or more receive antennas at the STA;
• measure a signal strength of the null data packet received at each receive antenna of the one or more receive antennas;
• receive a request to transmit a received signal strength indicator in a channel state information report;
• and
• transmit, to a second device and based at least in part on receiving the request, the channel state information report comprising the received signal strength indicator for each receive antenna of the one or more receive antennas, the received signal strength indicator indicating the measured signal strength of the null data packet at a respective receive antenna.

An apparatus for wireless communication, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit a request for a station (STA) to include a received signal strength indicator in a channel state information report;
• receive, based at least in part on transmitting the request, the channel state information report comprising the received signal strength indicator indicating a received signal strength of a null data packet for each receive antenna of one or more receive antennas at the STA;
• and
• perform radio frequency sensing based at least in part on the received signal strength indicator in the channel state information report.

An apparatus for wireless communication at a station (STA), comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive a null data packet at one or more receive antennas at the STA;
• measure a total gain of one or more circuits at each receive antenna of the one or more receive antennas;
• and
• transmit, to a second device, a channel state information report comprising the total gain at each receive antenna of the one or more receive antennas.

An apparatus for wireless communication, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive a channel state information report comprising a total gain of one or more circuits at each receive antenna of one or more receive antennas at a station (STA), the total gain measured based at least in part on a null data packet;
• and
• perform radio frequency sensing based at least in part on the total gain at each receive antenna in the channel state information report.