For the carrier frequency estimation of DS/BPSK signals damaged by strong additive white Gaussian noise,a cross-correlation accumulation method is proposed with the aid of the nonlinear processing and the thought of correlation accumulation.

In order to study the jamming against Inverse Synthetic Aperture Radar(ISAR),the anti-jamming ability of ISAR is analyzed and simulated based on motion compensation arithmetics,which include correlation arithmetic,the arithmetic of restricting amplitude combining with accumulating correlation.

Secondly,a space-time-frequency domain solution to this problem was described:adaptive nulling array processing is considered in space domain,channel equalization and adaptive interference cancellation are used in time domain,furthermore,long-time coherent integration is provided in frequency domain.