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    摘要高速运动目标探测技术广泛地应用在了民用和军事领域。本课题是基于DSP信号处理技术，模拟目标回波信号在不同体制探测系统中射频输出的低频信号，该信号作为信号源可用于对探测器信号处理电路的调试当中。所谓不同体制是指典型体制中的连续波多普勒体制和连续线性调频体制。
    本文主要研究的是锯齿波调频多普勒定距系统，对系统中发射信号与回波信号相混频后的差频信号的表达式进行了分析，同时把基本的定距方案进行模拟，然后用Matlab/Simulink软件平台对整个定距系统进行仿真，从而验证锯齿波调频定距系统的可利用性。
    我们还采用了基于DSP的软硬件结合的方法通过编程实现了锯齿波目标回波低频信号的输出,DSP芯片的内部结构是专门为数字信号处理设计的,相比于通用的CPU，DSP芯片做数字信号处理更方便,所以用DSP的实现方法有很多优势，例如：速度快,易于更新算法。19166
    关键词 连续波多普勒 调频定距 锯齿波 仿真 DSP
    毕业设计说明书（毕业论文）外文摘要
    Title    Study on Simulation Technology  of  moving target                                                   detection of target echo signal Based on the DSP                                                 
    Abstract
    Technology has been widely used in military and civil field of high speed moving target detection.This topic is based on the DSP signal processing technology, simulate the target echo signal in the low frequency signal of the different system to detect the RF output in the system, the signal as the signal source can be used for the detector signal processing . In this thesis, the fixed distance system of sawtooth wave FM Doppler is worked over. The expression of the difference frequency signal is particularly speculated and analyzed ,which is mixed by the transmitted signal and received signal in the system. According to the analysis, the basic fixed distance scheme is proposed. The feasibility of the entire system is proved by the Matlab/Simulink simulation.
    We use the method of combining the software and hardware based on DSP through the programming of the sawtooth wave output target echo signal with low frequency,The internal structure of the DSP chip is designed for digital signal processing design,The DSP chip is more suitable for digital signal processing than general CPU,Therefore, the implementation of  method have advantage  in high speed, easy to update algorithm  based on DSP.
    Keywords  Continuous wave Doppler  Frequency spacing  Sawtooth wave   Simulation  DSP                                                     
     目   录    

    1 绪论    1
    1.1 选题的背景及科学意义    1
    1.2本领域的发展概述    1
    1.3 论文工作安排    3
    2 锯齿波调频探测体制    4
    2.1连续波调频探测体制    4
    2.2 锯齿波调频探测体制    5
    2.2.1 调频定距原理    7
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