| This paper studies the researching and imitating of the signal processing circuit board of REL-5 1 radar抯 signal processing rack. Firstly, the theory and method of signal processing are introduced. Secondly, the Application Specific Integrated Circuit (ASIC) in the signal processing circuit is analyzed, and replaced by the programmable logic devices. Finally the Turning Data Interface circuit board and the Pulse Repetition Frequency Discriminator/Integrator circuit board are designed and test, which meets with the perspective requirement.
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