1. Mutual Interference Mitigation for MIMO-FMCW Automotive Radar
- Author
-
Jin, Sian, Wang, Pu Perry, Boufounos, Petros, Orlik, Philip V., Takahashi, Ryuhei, and Roy, Sumit
- Subjects
Electrical Engineering and Systems Science - Signal Processing ,Computer Science - Information Theory ,Electrical Engineering and Systems Science - Systems and Control ,Mathematics - Statistics Theory - Abstract
This paper considers mutual interference mitigation among automotive radars using frequency-modulated continuous wave (FMCW) signal and multiple-input multiple-output (MIMO) virtual arrays. For the first time, we derive a general interference signal model that fully accounts for not only the time-frequency incoherence, e.g., different FMCW configuration parameters and time offsets, but also the slow-time code MIMO incoherence and array configuration differences between the victim and interfering radars. Along with a standard MIMO-FMCW object signal model, we turn the interference mitigation into a spatial-domain object detection under incoherent MIMO-FMCW interference described by the explicit interference signal model, and propose a constant false alarm rate (CFAR) detector. More specifically, the proposed detector exploits the structural property of the derived interference model at both \emph{transmit} and \emph{receive} steering vector space. We also derive analytical closed-form expressions for probabilities of detection and false alarm. Performance evaluation using both synthetic-level and phased array system-level simulation confirms the effectiveness of our proposed detector over selected baseline methods., Comment: 15 pages, 10 figures
- Published
- 2023