In an automotive radar scenario, the transmission of sparsely spaced chirps along slow time creates opportunities to significantly reduce or completely avoid mutual interference. However, nonuniform chirps result in high Doppler sidelobes, which may introduce ambiguity in Doppler estimation. In this article, we present an automotive frequency-modulated continuous-wave radar that exploits difference co-chirps to achieve high-accuracy range–Doppler estimation with low complexity. By exploiting sparsity in slow time, the proposed method achieves the same Doppler velocity resolution as the regular uniform pulsing but with much fewer chirps. The silent transmission intervals become available to other automotive radars, thereby eliminating the mutual interference. The fast-time samples are treated as snapshots to construct the second-order statistical information for Doppler spectrum estimation. For our proposed nonuniform pulsing, we develop an efficient range–Doppler spectrum estimation method and propose a matching technique that is based on 2-D compressed sensing followed by Doppler dealiasing. This algorithm achieves ipso facto range–Doppler pairing without grid mismatch errors in parameter estimation and does not require an exhaustive search. Extensive numerical experiments show that accurate range–Doppler estimation is achieved with significantly fewer chirps compared to the conventional consecutive transmission. Field campaigns using Texas Instruments imaging radar support our theoretical investigations.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Automotive FMCW Radar With Difference Co-Chirps


    Contributors:


    Publication date :

    2023-12-01


    Size :

    4322142 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Vehicle radar sensor utilizing non-uniform frequency modulated continuous wave (FMCW) chirps

    LI CHUNSHU / CROUCH STEPHEN | European Patent Office | 2022

    Free access

    Vehicle radar sensor utilizing non-uniform frequency modulated continuous wave (FMCW) chirps

    LI CHUNSHU / CROUCH STEPHEN | European Patent Office | 2024

    Free access

    Vehicle Radar Sensor Utilizing Non-Uniform Frequency Modulated Continuous Wave (FMCW) Chirps

    LI CHUNSHU / CROUCH STEPHEN | European Patent Office | 2025

    Free access

    Vehicle Radar Sensor Utilizing Non-Uniform Frequency Modulated Continuous Wave (FMCW) Chirps

    LI CHUNSHU / CROUCH STEPHEN | European Patent Office | 2023

    Free access

    Radar cross section measurement with 77 GHz automotive FMCW radar

    Lee, Seongwook / Kang, Seokhyun / Kim, Seong-Cheol et al. | IEEE | 2016