The Generation And Processing Of High Frequency Radar Jamming Signals

This paper studies two typical high-frequency radar signal system-LFM signal and BPSK signal. The jamming of two models of high frequency radar, LFMICW radar, LFMPCW radar and Bi-Phase-Coded radar, are studied in this dissertation. On the basis of analyzing the radar signal model,this paper analyzed the generating of jamming waveform and the way of practical implementation. The effectiveness of all the algorithms proposed in this paper are verified.First, we set up the models of linear frequency radar and bi-phase-coded radar respectively, and discuss the models mathematically. Then by the method of computer simulation, the processing methods of three kinds of echoes are simulated to extract the speed and distance information. Based on that, we analyze the technologies of radar active jamming, and research blocking jamming and deception jamming for aircraft and ship targets systemically, achieving the scheme of blocking jamming and deception jamming of these three forms of signals.Secondly, we write the C code according to the jamming signal generation algorithm and migrate to high-frequency radar jamming signal generation hardware platform. Program various software modules using the instructions works in parallel, to optimize the compiled code. Write the signal processing simulation program and design a friendly graphical interface for digital frequency shifting conversion and quadrature demodulation to verify the baseband jamming signal generated by the hardware platform.Finally, we design a lot of jamming experimental program to test the system integrally. Analyze the performance of the jamming signal to prove the validity and correctness of the hardware platform and collect the experimental data, bring the hardware platform some valuable suggestions for improvementThe radar jamming source hardware platform based on the general signal processor TMS320C6713 of TI Company uses two DSPs work in parallel. In this platform, write the individual software modules using the parallel commands, in order to obtain better real-time signal processing capabilities, and achieve the real-time generation in engineering practice, meeting the task requirements.