Clutter suppression method based on singular value decomposition and fast wavelet algorithm

The invention belongs to the field of radar clutter suppression, and relates to a clutter suppression method based on singular value decomposition and a fast wavelet algorithm. According to the method, common singular value decomposition and wavelet fast transform algorithms in principal component analysis are integrated, target extraction under the condition of a low signal-to-clutter ratio can be realized, and clutter components in received echoes are effectively suppressed. Through the singular value decomposition method, the position of the target can be found without too many decomposition layers when wavelet decomposition is carried out on the target, target signal distortion caused by too many decomposition layers is avoided, and the complexity of the algorithm is reduced. Meanwhile, the method abandons the defect that how to reconstruct the target can be determined only through prior information of the target distance in a traditional method, and the applicability of the method in an actual scene is i