Deriving angle information in wireless networks covering near-field areas

A method of wireless sensing performed by a receiver device, comprising:

• obtaining a plurality of signal strength measurements of one or more reference signals transmitted by a transmitter device on a first transmit beam, wherein the plurality of signal strength measurements is obtained using a corresponding plurality of receive beams of the receiver device, wherein the plurality of receive beams corresponds to a plurality of channel steering vectors, and wherein each of the plurality of channel steering vectors is parameterized with an angle value and a range value of a corresponding receive beam of the plurality of receive beams;
• determining an angle-of-arrival (AoA) of the one or more reference signals as the angle value of a channel steering vector corresponding to a receive beam of the plurality of receive beams resulting in a highest signal strength measurement of the one or more reference signals;
• and
• determining a distance to the transmitter device as the range value of the channel steering vector corresponding to the receive beam resulting in the highest signal strength measurement of the one or more reference signals.

A transmitter device, comprising:

• one or more memories;
• one or more transceivers;
• and
• one or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processors, either alone or in combination, configured to:
• transmit, via the one or more transceivers, to at least one receiver device, one or more reference signals on each of a plurality of transmit beams, wherein the plurality of transmit beams corresponds to a plurality of codepoints of a near-field codebook, and wherein each of the plurality of codepoints is parameterized with an angle value and a range value of a corresponding transmit beam of the plurality of transmit beams.

A receiver device, comprising:

• one or more memories;
• one or more transceivers;
• and
• one or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processors, either alone or in combination, configured to:
• obtain a plurality of signal strength measurements of one or more reference signals transmitted by a transmitter device on a first transmit beam, wherein the plurality of signal strength measurements is obtained using a corresponding plurality of receive beams of the receiver device, wherein the plurality of receive beams corresponds to a plurality of channel steering vectors, and wherein each of the plurality of channel steering vectors is parameterized with an angle value and a range value of a corresponding receive beam of the plurality of receive beams;
• determine an angle-of-arrival (AoA) of the one or more reference signals as the angle value of a channel steering vector corresponding to a receive beam of the plurality of receive beams resulting in a highest signal strength measurement of the one or more reference signals;
• and
• determine a distance to the transmitter device as the range value of the channel steering vector corresponding to the receive beam resulting in the highest signal strength measurement of the one or more reference signals.