Apparatus and method for cancelling interference signals

A method of cancelling an interference signal for a detection and ranging system comprising:

• generating a first signal based on a digital sequence, the first signal for mixing with a carrier signal to provide a transmission signal;
• generating a second signal based on the same digital sequence used to generate the first signal, the second signal having a predetermined time delay relative to the first signal wherein the predetermined time delay is characteristic of an interference signal expected to be received by the detection and ranging system;
• receiving a received signal for detection and ranging, the received signal having components comprising at least none, one, or more reflections of the transmission signal and a component comprising the interference signal;
• and
• providing an output signal by mixing the received signal and the second signal thereby cancelling the interference signal in the received signal.

An automotive radar system comprising a transceiver for a detection and ranging, the transceiver comprising:

• a transmitter chain comprising a first sequence generator configured to generate a first signal based on a digital sequence, the first signal for mixing with a carrier signal to provide a transmission signal;
• an interference cancellation block comprising a second sequence generator configured to generate a second signal based on the same digital sequence used to generate the first signal, the second signal having a predetermined time delay relative to the first signal wherein the predetermined time delay is characteristic of an interference signal expected to be received by a receiver chain of the transceiver;
• and
• the receiver chain configured to receive a received signal for detection and ranging, the received signal having components comprising at least none, one, or more reflections of the transmission signal and a component comprising the interference signal, the receiver chain comprising a first analog signal mixer configured to provide an output signal by mixing the received signal and the second signal thereby cancelling the interference signal in the received signal.