Application of velocity super-resolution algorithm to lost target velocity spectrum reconstruction

In the case of low elevation angle incidence, the ground reflection path influences the target's SNR and makes it fluctuate acutely, sometimes leading to the loss of the target traced by UHF radar. Combined with MUSIC algorithm, the conventional Toeplitz construction method is modified properly to realize the targets' signal detection and high-resolution spectrum estimation in velocity-dimension. In order to reduce the impact of multi-path effect, the correlation analysis based on Fourier Transform is adopted. This method can be used to separate the signal eigen subspace and the noise one by the distance relationship of eigen frequency. It can improve detection of targets and velocity resolution in lower SNR case. Both simulation and the actual data testify the validity of this method.