During the last decade, the demand of smart sensors for advanced driving assistance systems (ADAS) has increased in order to keep the road safety at a sufficient level. For ADAS, one of the most widely considered sensors are radars. In the next few years, it is expected that each new car model will be equipped with many radars providing a 360view of the scene. Due to the significant increase of number of radars in heavy traffic conditions, it is expected that the interferences among those radars will significantly reduce their reliability.Unfortunately, analog front-end imperfections such as phase noise are known to aggravate the interference problem. Since there is no standardisation of the radar waveforms, the radardesigners are free to choose the best waveforms to minimise the impact of the interferences on the radar performance. Our aim is to compare the robustness of frequency-modulated continuous wave (FMCW) and phase-modulated continuous wave (PMCW) waveforms to mutual interference when the radars are subject to phase noise. A mathematical model of the radar is built to formalise the problem and numerical results are provided in order to assess the degradations on range-Doppler Maps.info:eu-repo/semantics/publishe