Content
Fine range and Doppler resolutions are desirable in automotive radar systems to estimate target properties accurately. However, targets detected by radar systems can suffer from range migration, which is caused by the relative movement of targets during the coherent processing interval (CPI). Range migration results in energy dispersion across multiple cells in the range-Doppler domain. This dispersion leads to a reduced signal-to-noise ratio (SNR) and an increased risk of masking weak targets in adjacent cells. To address this issue, we present a range migration compensation method for phase-modulated continuous wave (PMCW) radar systems. The feasibility is investigated in a simulated environment. The results show that the approach focuses target energy into a single range-Doppler cell, resulting in an increased SNR and improved target detection.