Systems and methods for phase-modulated radar detection

A method for radar detection, comprising:

• at a set of transmit elements of a radar array, the set comprising a first transmit element and a second transmit element, transmitting a first code-division multiplexed set of radar probe signals, comprising:
• based on a first encoding, transmitting a first encoded set of radar probe signals;
• and
• substantially concurrent with transmitting the first encoded set, transmitting a second encoded set of radar probe signals;
• at a receiver of the radar array, receiving a first set of reflected signals generated by reflection of the first code-division multiplexed set from at least one target in an environment surrounding the radar array;
• based on the first encoding, demultiplexing the first set of reflected signals to generate a first decoded set of signals and a second decoded set of signals;
• at the set of transmit elements, transmitting a second code-division multiplexed set of radar probe signals phase shifted from the first code-division multiplexed set based on a first set of phase variances, wherein transmitting the second code-division multiplexed set comprises:
• based on the first encoding and the first set of phase variances, transmitting a third encoded set of radar probe signals;
• and
• substantially concurrent with transmitting the third encoded set, transmitting a fourth encoded set of radar probe signals;
• at a receiver of the radar array, receiving a second set of reflected signals generated by reflection of the second code-division multiplexed set from the at least one target;
• based on the first encoding, demultiplexing the second set of reflected signals to generate a third decoded set of signals associated with the first transmit element and a fourth decoded set of signals;
• and
• based on the first, second, third, and fourth decoded sets, determining target location information associated with the at least one target.