Radar interference mitigation using a pseudorandom offset

An apparatus comprising:

• an antenna array;
• and
• a wireless transceiver coupled to the antenna array, the wireless transceiver configured to:
• transmit multiple radar transmit signals via the antenna array, the multiple radar transmit signals having respective center frequencies that differ from each other based on respective frequency offsets;
• receive multiple radar receive signals via the antenna array, at least one radar receive signal of the multiple radar receive signals including a portion of at least one radar transmit signal of the multiple radar transmit signals that is reflected by an object;
• receive, along with the at least one radar receive signal, another radar transmit signal from another apparatus;
• compensate for at least one frequency offset of the respective frequency offsets that is associated with the at least one radar receive signal such that a beat frequency associated with the at least one radar receive signal is substantially different from a beat frequency associated with the other radar transmit signal;
• and
• adjust a transmission parameter based on the at least one radar receive signal, the transmission parameter varying according to a distance to the object.

An apparatus comprising:

• offset generation means for generating respective frequency offsets according to a pseudorandom number generation process;
• an antenna array;
• and
• a wireless transceiver coupled to the antenna array and the offset generation means, the wireless transceiver comprising a complex tone generator coupled to the offset generator means, the complex tone generator configured to:
• generate multiple complex tones based on the respective frequency offsets;
• and
• generate multiple digital baseband signals based on the multiple complex tones, wherein the wireless transceiver is configured to:
• generate multiple radar transmit signals from the multiple digital baseband signals;
• transmit the multiple radar transmit signals via the antenna array, the multiple radar transmit signals having respective center frequencies that differ from each other based on the respective frequency offsets;
• receive multiple radar receive signals via the antenna array, at least one radar receive signal of the multiple radar receive signals including a portion of at least one radar transmit signal of the multiple radar transmit signals that is reflected by an object;
• and
• adjust a transmission parameter based on the at least one radar receive signal, the transmission parameter varying according to a distance to the object.

A method comprising:

• generating respective frequency offsets according to a pseudorandom number generation process;
• generating digital baseband signals having respective frequencies based on the respective frequency offsets;
• transmitting multiple radar transmit signals, the multiple radar transmit signals having respective center frequencies that differ from each other based on the respective frequency offsets;
• receiving multiple radar receive signals, at least one radar receive signal of the multiple radar receive signals including a portion of at least one radar transmit signal of the multiple radar transmit signals that is reflected by an object;
• generating respective inverse frequency offsets based on the respective frequency offsets;
• generating uncompensated digital baseband signals based on the multiple radar receive signals;
• generating other digital baseband signals by respectively multiplying the uncompensated digital baseband signals with the respective inverse frequency offsets;
• and
• adjusting a transmission parameter based on the at least one radar receive signal, the transmission parameter varying according to a distance to the object.