摘要无线电近感探测器对目标进行探测是通过发射电磁波，电磁波遇到目标,再经目标反射后被探测器接收到，对回波信号经过相应处理来提取目标特征，包括目标的距离、速度、目标特征等方面信息。66213

脉冲多普勒是经典的无线电近感探测器体制，它具备脉冲和连续波多普勒两种体制的优点，可同时实现定距与测速。

本文首先以脉冲对连续波相干检测为例，分析了近程探测系统工作时各部分信号。然后采用仿真软件MATLAB/simulink，分别搭建了自差式、外差式、脉冲对连续波的近程探测系统，通过仿真提取多普勒频移信号，获取运动目标的速度信息；同时给出定距方案，简要分析了影响定距精度的因素。

毕业论文关键词  脉冲多普勒  MATLAB/simulink  多普勒频移   定距   

毕业设计说明书（论文）外文摘要

Title    Analysis and simulation of Pulse Doppler  short-range detection system                                                

Abstract

Radio near-sensing detector on the target detection is emit electromagnetic wave, electromagnetic wave encounters the target, reflected by the target and then received by the detector, through appropriate processing of the echo signal to extract the target features. Identify the target in order to extract the target distance, speed, features and other aspects of the target information, the most important part is processing the target echo signal.

Pulse Doppler(PD) is the classical radio near-sensing detector system which has the advantages of the Pulse、Continuous-wave(CW) systems，and it can realize ranging and velocity measuring.

First,the article takes the Pulse Doppler fuze with pulse-CW coherent detection as an example and analyses the respective portions of signals of the short-range detection system.Then, I use the simulation software MATLAB / simulink to build  short-range detection system block diagram of self-heterodyne heterodyne and pulse-CW,extract the Doppler frequency signals by simulation to achieve the speed information of the moving target;give the ranging program and analyze the factors that affect the ranging accuracy briefly.

Keywords  Pulse Doppler  MATLAB/simulink  Doppler frequency   ranging

目   次

1  引言 1

1．1  课题背景 1

1．2  国内外研究现状 1

1．3  脉冲体制近程探测系统 2

1．4  本文主要工作 4

2  脉冲多普勒近程探测系统分析 5

2．1  脉冲多普勒检测方式 5

2.1.1  脉冲对脉冲相干检测的脉冲多普勒引信 6

2.1.2  脉冲对连续波相干检测的脉冲多普勒引信 8

2．2  系统信号分析 9

2．3  脉冲多普勒引信信号参数的选择 13

2.3.1  调制脉冲宽度M的选择 13

2.3.2  调制脉冲频率fM的选择 13

3  基于MATLAB/simulink的脉冲多普勒近程探测系统仿真 15

3．1  发射信号部分 15