Blind source extraction algorithm of LFM signal in given frequency modulation slope range

In highlight model, geometric highlights are often affected by elastic echoes. Based on “constrained blind source extraction” framework, an algorithm for LFM signal extraction in given frequency modulation slope (FMS) range is proposed. The cost function is constructed by combining negative entropy and interval constraint function, in addition, continuity and convergence are satisfied. The algorithm realizes extraction of the single source signal in specific FMS range. It is helpful to enhance the geometric highlights, which is of great significance to the subsequent target detection.