Interference suppression for multi-radar coexistence

A radar system, comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the one or more processors to perform processing comprising:
• generating a frequency-modulated signal comprising a first chirp sequence, wherein each chirp in the first chirp sequence is generated according to a set of waveform parameters;
• varying at least one waveform parameter in the set of waveform parameters for one or more chirps in the first chirp sequence;
• generating a phase signal according to a set of phase modulation parameters, wherein the set of phase modulation parameters includes a first parameter representing a slope of the phase signal and a second parameter representing a frequency offset of the phase signal;
• generating a transmit signal by phase-modulating the frequency-modulated signal using the phase signal such that each chirp in the first chirp sequence has a corresponding phase determined according to the phase signal;
• changing the phase signal by varying at least one phase modulation parameter of the set of phase modulation parameters for at least one chirp in the first chirp sequence;
• receiving a receive signal comprising a second chirp sequence, the receive signal corresponding to the transmit signal reflected off an object in a surrounding environment, wherein the receiving comprises sampling the receive signal;
• and
• determining, using the sampled receive signal, one or more attributes of the object.

One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors of a computer system, cause the one or more processors to:

• generate a frequency-modulated signal comprising a first chirp sequence, wherein each chirp in the first chirp sequence is generated according to a set of waveform parameters;
• vary at least one waveform parameter in the set of waveform parameters for one or more chirps in the first chirp sequence;
• generate a phase signal according to a set of phase modulation parameters, wherein the set of phase modulation parameters includes a first parameter representing a slope of the phase signal and a second parameter representing a frequency offset of the phase signal;
• generate a transmit signal by phase-modulating the frequency-modulated signal using the phase signal such that each chirp in the first chirp sequence has a corresponding phase determined according to the phase signal;
• change the phase signal by varying at least one phase modulation parameter of the set of phase modulation parameters for at least one chirp in the first chirp sequence;
• receive a receive signal comprising a second chirp sequence, the receive signal corresponding to the transmit signal reflected off an object in a surrounding environment, wherein the receiving comprises sampling the receive signal;
• and
• determine, using the sampled receive signal, one or more attributes of the object.