A Dual-Slope BlueFMCW Radar for Simultaneous Mitigation Against Close-in DRFM and Frequency Domain Spoofing Attacks

Spoofing attacks pose a significant threat to automotive and biomedical radars. While the conventional BlueFMCW radar waveforms can mitigate close-in spoofing attacks from Digital Radio Frequency Memory (DRFM) and synchronization-based spoofing attacks, they fail to mitigate the Frequency Domain Spoofing (FDS) attacks, which are low-cost and require no synchronization with the victim radar. To address this limitation, we propose a Dual-Slope BlueFMCW radar waveform that enables the mitigation of distance spoofing attacks from both close-in DRFM devices and FDS devices. A new signal processing flow is developed to reject spoofed targets introduced by FDS devices while spreading close-in spoofed targets from DRFM-based spoofing device across multiple range bins. Extensive mathematical derivation and simulation results validate the effectiveness of the proposed Dual-slope BlueFMCW radar waveform in countering both types of spoofing attacks simultaneously.