Phase Modulated FMCW Waveforms and Receiver Structures for Automotive MIMO Radars

The paper revises the state-of-the-art receiver structures and waveform selection for the phase-modulated frequency modulated continuous wave (PM-FMCW) waveform. First, the trade-offs in performance/processing/hardware implications imposed by the receiver are discussed. Thus, the matched filter bank, the group delay receiver, the fractional correlator and waveform pre-distortion and post-distortion are discussed. Further, we analyze the impact of the modulation phase keying on PM-FMCW performance. Further, we demonstrate the feasibility of PM-FMCW MIMO radar and practically achievable dynamic range via numerical simulations and experimental verification. Based on these results, we draw a few challenges that remain open for PM-FMCW MIMO radars.