基于fpgalfmcw雷达信号处理实现

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1、硕士论文基于FPGA的LFMCW雷达信号处理实现摘线性调频连续波雷达由于具有截获概率较低、机动性强、距离分辨力高、抗干扰能力强等优点，广泛地应用于很多领域。本文完成了基于FPGA的三角波LFMCW雷达信号处理器的设计。本文简要阐述了LFMCW雷达系统的应用背景、结构和基本原理，分析了三角波LFMCW雷达的回波信号以及模糊函数，讨论了目标和雷达之间相对运动在频域上出现的距离．速度的耦合现象，采用MTD．频域配对法来解决、消除距离．速度耦合，测出了目标的距离值和速度值。借助QuartusII软件、运用VHDL语言仿真，完成了基于F

2、PGA的三角波调制信号的产生。重点研究了基于FPGA的信号处理的设计，给出了设计的流程图。运用QuartusII软件完成了混频采样后信号的快速傅里叶变换(FFT)、求功率、数据处理和存储等各个模块的VHDL编程，对各个模块进行了仿真测试。把经过功能验证的各个模块按照设计的流程图连接成信号处理的综合原理图，对整体模块联调，得到对应的距离值。最后，在基于EP2C5T144C8FPGA的开发板上对设计的各个模块进行硬件调试，将调试结果与前仿结果进行对比，验证本文信号处理设计的正确性，实现了对回波信号钡0速i贝0距的目的。关键词：LF

3、MCW，信号处理，FPGA，FFTAbstract硕士论文ConsideringLFMCWRadar’Sadvantagesinlowinterceptprobability,strongmobility,hi曲一resolutioninrangeands仃onganti—interferencecapability,itiswidelyappliedtomanyfields．ThethesisachievestherealizationofprocessingtriangularwaveLFMCWwhichisbasedon

4、FPGA．ThisthesisbrieflyexplainstheapplicationbackgroundofLFMCWradarsystem，alsodoesitsstructureandthebasicprinciple．ThethesisanalyzestheechosignalandambiguousfunctionofthistriangularwaveLFMCWRadar．Atthesametime，thecouplingphenomenonofdistance-velocitywhichappearsonfre

5、quencydomainbytherelativemotionbetweentargetandradarisdiscussed．ThisthesisusesthemethodcombiningMTD、^，ithfrequencydomainpairingtoeliminatethecouplingphenomenonofdistance-velocity,andthetarget’Sdistanceandspeedvaluearegot．Thethesisrealizesthedesignoftriangularwavemod

6、ulationsignalbasedonFPGAwitllVHDLlanguage．ThedesignofsignalprocessingbasedonFPGAisfocusedon，alsotheflowchartofthedesignisgiven．WimVHDLlanguage。modulesliketheFFTofsignalaftermixingsampling，powermodule，dataprocessandstorageareachieved，andthecorrespondingsimulationtest

7、sareshowed．Accordingtotheflowchartofthedesign，allthesemodulesafterfunctionalverificationareconnectedintoaoverallschematicdiagram，andtheoverallmoduleisdebuggedinsoftwaretoacquirethecorrespondingdistancevalue．Finally,debugeachmodulewithdevelopmentboardbasedonEP2C5T144

8、C8FPGA．Theresultsofthehardwaretestindicatethatthesoftwaredesignofthesignalprocessingiscorrect．Theyachievetorealizerange／speedmeasurementin