Research on Spectrum Estimation and Suppression Methods for Sea Clutter

A block adaptive two-level sea clutter suppression method is proposed to address the issue of error detection in the sea clutter background of missile borne terminal guidance radar. Firstly, the Doppler spectrum of the echo signal is modeled and estimated, and a median estimator is used for power spectrum estimation. The first level suppression of the power spectrum is based on a block adaptive clutter suppression filter. Then, the non correlation of adjacent range gate Doppler spectra is utilized to perform spectral similarity processing on the data after block adaptive filtering. The block adaptive filtering results can then be subjected to a second level sea clutter suppression processing. The measured data are verified, and the rationality and progressiveness of the method are proved by comparing with the existing methods.