Interference mitigation in high resolution radars

A radar system comprising:

• a plurality of transmit antennas that transmit a radar signal toward a target, wherein the plurality of transmit antennas are assigned transmitter-specific phase offsets via which the radar signal is modulated, wherein the phase offsets correspond respectively to offsets in velocity of a target, and wherein the plurality of transmit antennas transmit the radar signal according to:
• a frequency which is uniquely and randomly allocated to the radar system from among a set of candidate frequencies;
• a timeslot which is uniquely and randomly allocated to the radar system from among a set of candidate timeslots;
• and
• a Doppler code which is uniquely allocated to the radar system from among a set of candidate Doppler codes;
• a plurality of receive antennas that receive a radar return comprising transmitted signals reflected by the target;
• and
• one or more processors configured to:
• determine whether a peak signal corresponding to a phase offset assigned to a given transmit antenna from among the phase offsets is present in the received radar returns, the peak signal corresponding to a perceived velocity at which the target is moving;
• and
• generate an output indicative of a presence or absence of peaks corresponding to the phase offset assigned to respective transmit antennas;
• wherein the peaks are indicative of a presence of the target in an environment of the radar system.

A radar system comprising:

• a plurality of transmit antennas;
• a plurality of receive antennas;
• and
• a hardware logic component that is configured to perform acts comprising:
• transmitting a radar signal from the plurality of transmit antennas, wherein the plurality of transmit antennas are assigned transmitter-specific phase offsets via which the radar signal is modulated, wherein the transmitter-specific phase offsets correspond to offsets in velocity of a target, and wherein transmitting the radar signal from the plurality of transmit antennas is according to:
• a frequency which is uniquely and randomly allocated to the radar system from among a set of candidate frequencies, wherein the frequency is different from a second frequency which is uniquely and randomly allocated to another radar system different from the radar system;
• a timeslot which is uniquely and randomly allocated to the radar system from among a set of candidate timeslots, wherein the timeslot is different from a second timeslot which is uniquely and randomly allocated to the other radar system;
• and
• a Doppler code which is uniquely allocated to the radar system from among a set of candidate Doppler codes, wherein the Doppler code is different from a second Doppler code which is uniquely allocated to the other radar system;
• receiving at the plurality of receive antennas a radar return comprising transmitted signals reflected by the target;
• determining whether a peak signal corresponding to a phase offset assigned to a given transmit antenna from among the phase offsets is present in the received radar returns, the peak signals corresponding to perceived velocities at which the target is moving;
• and
• generating an output indicative of a presence or absence of peaks corresponding to the phase offsets assigned to respective transmit antennas, wherein the peaks are indicative of a presence of the target in an environment of the radar system.