By analyzing the working-patterns and locating principle of the passive locating systems,the essay brings up 3 methods in order to improve the counter-measurement methods that were used originally in active radar interferences to interfere passive locating systems-noise suppressing,vivid fake targets and distributed false targets.

The beamspace method for parameters estimation of distributed sources;

Improving the DOA estimation performance of distributed sources via projection pretransformation;

New radar distributed target detection based on two dimension integrated;

Distributed target modeling and high resolution DOA Estimation;

From the theory of SAR and noise jamming, the Doppler signal course of SAR is analyzed and the signal simulation mathematical modes of point target, distributed target, hot noise and noise jamming are constructed.

An approach to direction of arrival estimation of distributed sources;

The simulation studies show that the new method outperforms conventional MUSIC algorithm by reducing the sensitivity for scenarios with distributed sources.

In the existing distributed source direction-of-arrival(DOA) estimation algorithms,most of them need search in one-or two-dimensional space.

Downlink Beamforming for Distributed Objects;

Aiming at the large mount of calculation of the traditional algorithms for polarimetric power optimization of random target in arbitrary channel,a fast algorithm is proposed in this article.