This paper addresses the challenge of mutual interference in phase-modulated
continuous wave (PMCW) millimeter-wave (mmWave) automotive radar systems. The
increasing demand for advanced driver assistance systems (ADAS) has led to a
proliferation of vehicles equipped with mmWave radar systems that operate in
the same frequency band, resulting in mutual interference that can degrade
radar performance creating safety hazards. We consider scenarios involving two
similar PMCW radar systems and propose an effective technique for a cooperative
design of transmit waveforms such that the mutual interference between them is
minimized. The proposed approach is numerically evaluated via simulations of a
mmWave automotive radar system. The results demonstrate that the proposed
technique notably reduces mutual interference and enhances radar detection
performance while imposing very little computational cost and a negligible
impact on existing infrastructure in practical automotive radar system