At last, the communication jamming efficiency evaluation model to link 16 is given and the model is validated preliminarily.

Based on the function and battle tasks of communication jamming system,the evaluation indexs system is set up which is consisted of reconnaissance ability,command-control ability, jamming ability, via- bility, and creditability .

When the military strength finding the submarine reports the coordinate of submarine to shock military strength,the communication jamming against it can reduce probability of submarine destroy.

There is so much communication interference in operation bandwidth of meter-wave radar,the methods of suppressing the communication interference is the important item in designing process of the meter-wave radar.

Basic principles and work peculiarityes are introduced emphatically,and the application of DDS technology to communication interference is also introduced in this paper.

The working wavelength of UV communication system is confirmed numerically.

Using ultraviolet fluorescent lamp as the light source, combining frequency modulation and demodulation technology can achieve a UV communication system with low date rates.

In this paper,transmission rate of ultraviolet communication system has been enhanced by using a kind of demodulation method with AVR microcontroller;this method,which has properly dealt with the transition area problems of 2FSK signals,has properly demodulated the original signals from the modulated signals.

Transmission rate of ultraviolet communication system has been enhanced by using a kind of demodulation method with FPGA,with the method which has properly solved the transition area problems of 2FSK signals,we have properly demodulated original signal from a modulated signal.