Carrier recovery is the key technology for coherent demodulation receiver in RF communication,and carrier recovery algorithm directly determiner the performance of the receiver.

Taking the modulated signal,one of the typical narrow-band random processes,as an example,this paper simulates the whole process of speech communication in the white Gauss noise background,and compares the quality of speech signal taking coherent demodulation method with the one taking envelope demodulation method.

Research on coherent jamming against SAR;

By introducing the effective gain factor and its calculation expressions of the jamming signals, the relationship of jamming power is analyzed between the SAR noise jamming and coherent jamming, while it dissertates the theory of the synthetic jamming technolog.

The principle of coherent jamming is decribed briefly.

Study of the performance of suppressing the coherent interference based on shipborne uniform circular array;

Elimination of coherent interference in seismic data processing;

The experimental results shows that this method can extract the useful signal effectively under white noise or coherent interference.

Analysis of correlation jam in the remote sensing image based on the transformed space Hough algorithm;

On the other hand, by analyzing the merits of the images, the system can detect the random-phase correlation jam and impro.