Research And Implementation Of Anti-radiation Seeker Signal Processing Technology Based On Software Radio

With the advancement of science and technology,modern warfare tends to develop in the direction of electronic information,and the anti-radiation missiles which aim to destroy the enemy radar and other electromagnetic equipment play a decisive role in the battlefield.The research on anti-radiation seeker,the key component of anti-radiation missiles,has become one of the significant research hotspots at home and abroad.The real-time processing technology of high-speed digital signal based on software radio theory can well meet the performance requirements of anti-radiation seeker with high precision,large bandwidth and wide dynamic range.On this foundation,this thesis conducts in-depth research on the anti-radiation seeker signal processing theory,and implements engineering on the software radio platform,thereby designing an anti-radiation seeker signal processor with a frequency range of 2～18GHz and an instantaneous bandwidth of 400 MHz.Firstly,the signal processing system of anti-radiation seeker is designed based on the deep research of digital channelized receiver,radar signal pulse descriptor word measurement and pulse clustering sorting,and its system model is established on MATLAB to simulate verify the correctness and feasibility of the system.Then on the basis of theory and simulation,the anti-radiation seeker signal processor based on software radio is designed.The system takes FPGA and DSP chips as the core processor,which can better undertake the task of complex timing design and signal processing algorithm.The high-performance ADC chip and high-speed ISERDES are used to realize the digital channelized reception of 1.2Gsps high-speed sampling signal;the seven channels phase interferometer deblurring algorithm based on virtual baseline is used to solve the problem of contradiction between angle measurement accuracy and viewing angle range in large bandwidth.Finally,the actual system test of the anti-radiation seeker signal processor is carried out.The test verifies the performance of the system,and the test results show that the system can basically correctly sort and identify the target radar in the scene of up to three targets,which meet the performance requirements of this project.