It is well known that electromagnetic vector sensor (EMVS)-multiple-input multiple-output (MIMO) radar is an emerging technique that allows for 2D-direction-of-departure (DOD) and 2D-direction-of-arrival (DOA) estimation. Unfortunately, existing array geometries on the EMVS-MIMO radar can rarely reach a good compromise between the estimation accuracy and the computational burden. This article is aimed at proposing an L-shaped sparse array topology for a bistatic EMVS-MIMO radar, whose interelement distance is much larger than half-wavelength. A fast algorithm is proposed herein to estimate the 2D-DOD and 2D-DOA. First, the direction cosine estimates are obtained via the rotational invariance properties of the sparse subarrays, which are ambiguous yet exhibit high-resolution. Thereafter, the direction cosine estimates are achieved via the vector cross-product of the normalized Poynting vectors, which are unambiguous but have low-resolution. The unambiguous high-resolution direction cosine estimates are determined by combining the previous results, following which the 2D-DOD and 2D-DOA can be easily recovered. It is shown that the proposed framework can obtain a better accuracy of estimation than the other existing methods. Moreover, it is more flexible than the current sparse array methodologies. Finally, the theoretical derivations have been validated by simulation results.


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    Title :

    2D-DOD and 2D-DOA Estimation Using Sparse L-Shaped EMVS-MIMO Radar


    Contributors:
    Wen, Fangqing (author) / Shi, Junpeng (author) / He, Jin (author) / Truong, Trieu-Kien (author)


    Publication date :

    2023-04-01


    Size :

    576037 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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