Coherent method for ground‐moving target indication and velocity estimation using Hough transform
Amir Hosein Oveis, Mohammad Ali Sebt · IET Radar Sonar & Navigation · 2016
In this study, a novel algorithm for detecting the ground‐moving targets and estimating their motion parameters is proposed. Based on the fact that clutter has a certain phase pattern, clutter cancellation is accomplished using a phase modification and finite impulse response filtering. Then a type of coherent Hough transform is utilised to estimate the moving target velocity. By employing the coherent Hough transform, the proposed algorithm leads to the significant signal‐to‐noise ratio (SNR) and signal‐to‐clutter ratio improvement in comparison with similar previous Hough‐ or Radon‐based ground‐moving target indication and velocity estimation methods. In fact, uncorrelated noise samples have random phases that cancel each other, therefore, a noticeable SNR improvement would be achieved. Moving target detection is done by conventional constant false alarm rate (CFAR) techniques over different range gates.