A method of operating an automotive radar system for avoiding interference by other radar systems, the automotive radar system including - a radar transmitter unit that is configured to transmit radar waveforms ( x Tx, x̃ Tx,) having a radar carrier frequency towards a scene, - a radar receiving unit that is configured for receiving radar waveforms ( x Rx, x̃ Rx) that have been transmitted by the radar transmitter unit and have been reflected by a target (26, 28) in the scene, and - an evaluation and control unit that is configured for decoding range-Doppler information from the radar waveforms ( x Rx, x̃ Rx) received by the radar receiving unit, the method comprising steps of - transmitting a first sequence of radar waveforms ( x Tx) towards a scene, - receiving first radar waveforms ( x Rx) that have been reflected by a target (26, 28) hit by the transmitted first sequence of radar waveforms ( x Tx), - decoding first range-Doppler information from the received first radar waveforms ( x Rx), - transmitting at least a second sequence of radar waveforms ( x̃ Tx,k) towards the scene that differs from the first transmitted sequence of radar waveforms ( x Tx) by predetermined phase shifts ( φ k) such that each radar waveform ( x̃ Tx,k) of the second sequence has a different predetermined phase shift ( φ k), - receiving second radar waveforms ( x̃ Rx,k) that have been reflected by the target (26, 28) hit by the transmitted second sequence of radar waveforms ( x̃ Tx,k), - decoding second range-Doppler information from the received second radar waveforms ( x̃ Rx,k), - comparing deviations of the second range-Doppler information from the first range-Doppler information to at least one predetermined deviation value, and - based on the results of the comparing, identifying a potential interference condition. - a radar transmitter unit that is configured to transmit radar waveforms ( x Tx, x̃ Tx,) having a radar carrier frequency towards a scene, - a radar receiving unit that is configured for receiving radar waveforms ( x Rx, x̃ Rx) that have been transmitted by the radar transmitter unit and have been reflected by a target (26, 28) in the scene, and - an evaluation and control unit that is configured for decoding range-Doppler information from the radar waveforms ( x Rx, x̃ Rx) received by the radar receiving unit, the method comprising steps of - transmitting a first sequence of radar waveforms ( x Tx) towards a scene, - receiving first radar waveforms ( x Rx) that have been reflected by a target (26, 28) hit by the transmitted first sequence of radar waveforms ( x Tx), - decoding first range-Doppler information from the received first radar waveforms ( x Rx), - transmitting at least a second sequence of radar waveforms ( x̃ Tx,k) towards the scene that differs from the first transmitted sequence of radar waveforms ( x Tx) by predetermined phase shifts ( φ k) such that each radar waveform ( x̃ Tx,k) of the second sequence has a different predetermined phase shift ( φ k), - receiving second radar waveforms ( x̃ Rx,k) that have been reflected by the target (26, 28) hit by the transmitted second sequence of radar waveforms ( x̃ Tx,k), - decoding second range-Doppler information from the received second radar waveforms ( x̃ Rx,k), - comparing deviations of the second range-Doppler information from the first range-Doppler information to at least one predetermined deviation value, and - based on the results of the comparing, identifying a potential interference condition.