In the modern high-tech war,the electromagnetic environment is becoming more and more complex.Electronic attack weapons have covered almost all of the military communication frequency bands,forming a new “soft” and “hard” electronic attack situation.Based on the typical communication jamming equipment of foreign army,aiming at the typical stand-off jamming and throwing jamming environment,analyses and studies the interference countermeasure ability of the wireless communication system of the typical air defense combat weapon system.

With the great amelioration of unmanned aerial vehicle (UAV) technology and the gradual opening of low-altitude airspace authorized by national policies, low-altitude and low-speed UAV increasingly intimidates the security of key areas. On the basis of the advantages and disadvantages of domestic and overseas defense and control systems (fixed and mobile types), a new type of UAV defense and control system, integrating the two subsystems through wireless network technology, is proposed to fully compensate for their respective weaknesses, and achieve several key technologies such as multi-objective cooperative attack, remote assisting attack, etc. Then, a pilot application of the new UAV defense and control system was carried out at Shapotou Airport, Zhongwei, Ningxia. In the process, strong capabilities of the multi-target cooperative attack and remote assisting attack performed by the new UAV defense and control system were fully substantiated. The construction of this new UAV defense and control system is an important exploration of anti-UAV systems, which inspires the further development of new anti-UAV strategies.

Based on the theory of extenics, the extension model of air defense missile weapon system was established. Using extended analysis principle and extension reasoning knowledge such as extension, divergence, and implication, the extensive analysis and modeling on firepower conversion, interception scheme generation and screening of air defense missile weapon system were carried out. The calculation on air defense efficiency was simulated. The simulation results conformed to the actual operational process, which made the intercepting scheme generation of the air defense missile weapon system more formal, more logical. It provided a new idea and a new method for calculating the efficiency of air defense missile weapon system. It laid a foundation for writing software programs to achieve intelligent processing.

To locate airborne synthetic aperture radar (SAR) image with high accuracy, a fast inertial navigation error estimation method is proposed by using advantage of sub image back projection (BP) imaging. The relationship between inertial navigation error in position, velocity and positioning error under BP imaging model is investigated. The observation equation of positioning error is obtained by approximating the relationship in linear. Estimations of inertial navigation error in position and velocity can be obtained by least square method. Monte Carlo tests are processed under Gauss observation errors with the same mean and variance. It is illustrated that the proposed method possesses a lesser error of mean square compared with the conventional range-Doppler (R-D) model based estimation method.