Research On Key Techniques For Signal Processor Of Monopulse Radar Seeker

Signal processor is the key component for monopulse radar seeker. On the one hand, it is to complete tasks including the target searching, detection and tracking. On the other hand, it keeps real-time communication with other components of the seeker and controls the seeker's working status. The abilities of high-speed and mass data's real-time signal processing are badly required for the signal processor.The contents of this study include three parts. Firstly, some key technologies in the signal processor are studied. Secondly, the targert detection method under sea clutter background is discussed for monopulse radar. Finally, the difficulies encountered in the signal processor hardware debugging are analyzed.Several key technologies in the signal processor are studied in this paper , inluding: (1) The infection of DC level and noise to the frequency-domain digital pulse compression is analyzed, which is the base for the practicle application of the signal processor. (2) The accumulation of multiple coherent pulse is achieved through the coherent integration technology, which effectively improves the signal to noise ratio and enhance the radar detection performance. Otherwise, the high-resolution in the range direction is obtained by the synthetic high-resolution technology. (3) A composite tracking process is introduced to fufill the performance requirements, based on the ? ? ? filter and the active/passive signal processor,This signal processor is mainly used for marine target detection and tracking. Therefore, the statistical characteristics of sea clutter are analyzed, together with four common distribution models and parameter estimation methods. The selection of appropriate CFAR method is got based on the real sea clutter data and their distribution models. Finally, the detection method of the expansion target is studied based on the clustering.The multi-channel serial communication, AD sampling, temperature experiments and other related issues are studied in the hardware debugging. the design and debug of four-way FPGA-based parallel serial port is performed firstly, Then, The use of coherent sampling for the test of AD significant bit is introduced, through the test of the three channel's effective number of bits, the requirements of signal processor is satisfied. Finally, some issues encountered in temperature experiment are analyzed, and some solutions are given.The signal processor has applied in the radar seeker and works well.