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In this paper, on the basis of the analysis of chirp ranging principle of the detection system of the RF front-end design simulation and engineering . The paper firstly introduces the principle of linear frequency modulated continuous wave signal ranging to discuss the choice of parameters of the system transmitter signal modulation system indicators estimated . DDS and PLL phase noise characteristics were analyzed , spurious , phase noise angle , common programs from the system indicators , and decided to use the program to design DDS incentive PLL source . High frequency resolution , the program will be the DDS frequency switching time is short and the PLL output frequency is high , combining the advantages of spectral purity , and works to achieve relatively easy . By analyzing the advantages and disadvantages of the common receiver program , select a program of the Superheterodyne digital IF receiver , indicators and each device assigned to determine the entire system . Based on the above analysis , the complete the ranging system RF front-end development , including the design of the DDS, PLL, mixers , power splitters , etc. . Focused on the Notes module device selection , device design and the design process , and summarizes the problems encountered in the component testing process and propose a solution .
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