Direct wave suppression based on an improved CLEAN algorithm

The direct wave has a serious impact on the target detection performance of bistatic continuous wave radar system. The conventional direct wave suppression algorithm is LMS algorithm, but it is difficult to be applied in Graphic Processing Unit (GPU) due to the large number of iterations. CLEAN algorithm is a direct wave suppression algorithm which is suitable for GPU, whereas the basic CLEAN algorithm cannot adapt to the time-variation of direct wave. In this paper, the basic CLEAN algorithm has been improved to get better performance when the characteristic of direct wave is varied with the time. The correctness and effectiveness of the improved algorithm is verified by the simulation results and testing data analysis.