Compressed Sensing based Single Snapshot DoA Estimation for Sparse MIMO Radar Arrays
Fabian Roos, Philipp Hügler, Lizette Lorraine Tovar Torres, Christina Knill, Johannes Schlichenmaier, Claudia Vasanelli, Nils Appenrodt, Jürgen Dickmann, Christian Waldschmidt · 2019
The angular resolution of a radar system can be enhanced with an increasing antenna aperture. Instead of using more antenna elements, the distances in the aperture can be increased with a sparse array. To mitigate the high side lobes originating from the sparse array, the missing antenna elements can be reconstructed by means of compressed sensing. In this paper a sparse antenna array with a low side lobe level is determined with a genetic algorithm and a cost function. An investigation is performed what difference in the radar cross section of two targets in the same range-Doppler cell can be achieved. Additionally, instead of considering point targets only, a target vehicle is measured with a 77 GHz MIMO radar.