The Design Of Rada Echo Data Acquisition And Processing System

The working environment of rada is becoming more and more complex and the electric-magnetic countermeasure is enhanced continuously in the application of modern rada.The development of new system and high performance radar systems is gaining extensive attention.A testing equipment which can acquire radar echo signal and its dynamic working process in the outfield experiments is urgently needed when the radar is still under development and validation.But the traditional rada echo data recording system mostly use the hard recovery technology which is low reliability and high cost,so it is very necessary to develop a rada echo data acquisition,processing and forwarding system.According to the characteristics of rada echo signal and control signal, this paper proposes an implementation scheme of radar echo signal real-time acquisition and processing system under the comprehensive consideration of developing periods,costs,and the existing technology accumulation,and the design and test is completed on this basis.This paper demonstrate the feasibility of scheme from three apects:the timing of acquisition,data flow and processing flow. System hardware use the data processor of FPGA+DSP to implement six channel rada echo signal data acquisition,processing and forwarding.The control logic of FPGA,key control timing and design flow of DSP software is introduced on the basis of the accomplishment of system hardware design.At last,this paper introduced some key technologies,such as the method of phase coherence control and the data processing method based on pipeline.And the phase difference between channels and DSP preprocessing algorithm of system was tested and simulated rigorously.This system has been successfully applied to one radar system outside test,and its performance and indices is better than application requirement.