Design And Implementation Of Reconnaissance Subsystem In Wideband Jamming Simulator

Wideband jamming simulator is often used in specific electromagnetic environment simulations,usually including radar reconnaissance subsystems and jamming subsystems.The reconnaissance subsystem obtains the electromagnetic environment parameters in real time and guides the jamming subsystem to produce jamming efficiently.In this thesis,the research on the design and implementation of the reconnaissance subsystem of the wideband jamming simulator is carried out,focusing on the problems of further improving the system functions,enhancing the processing capacity of the system and optimizing the timeliness of the algorithm.The main work and contributions of the thesis are as follows:1.Based on the hardware architecture of the reconnaissance subsystem of the existing wideband jamming simulator,the software architecture design of radar signal processing is further improved,which can realize the high probability detection of wideband radar signal in the specific wideband electromagnetic environment.Using the analog front-end wideband parallel detection structure,this thesis presents a signal detection and search scheme system-adapted PRI + long-time dwell acquisition;and researches the joint control method of sensitivity and transmit power for the simultaneous working mode of wideband jamming simulator.2.Aiming at the problems of high adaptive signal-to-noise ratio,poor robustness and poor timeliness in the radar signal modulation type identification processing scheme of the existing reconnaissance subsystem,researching the modulation type identification methods of single frequency signals,LFM signals,BPSK signals,QPSK signals and2 FSK signals based on signal instantaneous phase difference and phase defuzzification threshold optimization.3.Aiming at the problem of the low success rate of equivalent and staggered signal sorting in the radar signal sorting scheme of the existing reconnaissance subsystem,the success rate of radar signal sorting for radar signal of equivalent and staggered in reconnaissance subsystem is improved by adding the filtering process of radar signal of equivalent and staggered based on the existing staggered analysis algorithm.4.The software optimization implementation of the ZYNQ-based wideband jamming simulator reconnaissance subsystem is further improved,and the reconnaissance function and signal processing capability of the system are enriched and improved.The signal detection and search scheme of system-adapted PRI + long-time dwell acquisition is completed and the joint control method of sensitivity-transmit power is realized.Combined with the dual-core collaborative processing capabilities of the ZYNQ,the reconnaissance algorithm is further decomposed and task division,and the radar signal reconnaissance capability of the reconnaissance subsystem of the wideband jamming simulator is further improved.The hardware test shows that the processing capacity of the system has been effectively improved.