摘要线性调频连续波（LFMCW）雷达是一种通过发射频率经过调制的连续波来获取目标参数信息的雷达体制，它具有低发射功率、高距离分辨力、无距离盲区等优点。

本文首先对LFMCW雷达的工作原理以及三角波调制情况下的中频信号及测速测距基本原理进行了详细推导分析，为后续算法的分析研究奠定了基础。

其次，本文简要分析了LFMCW雷达目标匹配、距离-速度解耦合的几种常见算法，并推导了变周期三角波调制方法中的容差函数。80522

最后，结合实例并运用MATLAB对LFMCW雷达多目标检测及参数估计的FFT、波束形成、CFAR检测、变周期匹配以及方位角测量等算法进行了具体分析和仿真验证，仿真结果表明这一套算法可以在误差允许范围内较为准确地测得目标位置以及速度、方位角等参数。 

毕业论文关键词  线性调频连续波雷达  多目标检测  参数估计  距离-速度耦合  MATLAB

毕业设计说明书外文摘要

Title    Multi-target detection and parameter estimation algorithms of LFMCW radar         

Abstract Linear frequency modulation continuous wave (LFMCW) radar is a radar system which can get the information of the targets through transmitting continuous wave with modulated frequency。 LFMCW radar has advantages of low signal power, high range resolution, no range blind area，etc。 

Firstly, this paper analyzes the operating principle of LFMCW radar and derives the intermediate frequency (IF) signal in the case of symmetrical triangular wave modulation, which also lays a foundation for the study of the subsequent algorithms。

Secondly, this paper analyzes several common methods of the target matching and eliminate range-velocity coupling of LFMCW radar, and derives the tolerance function of different cycle symmetrical triangular wave modulation method。 

Finally, this paper simulates several basic algorithms of multi-target detection and parameters estimation of LFMCW radar by MATLAB, such as FFT algorithm, beam forming, CFAR detection, different cycle matching and azimuth measurement, etc。 The simulation results show that we can measure parameters such as position, speed and direction of targets in range of the errors permitted。 

Keywords  LFMCW radar  Multi-target detection  Parameter estimation Range-velocity coupling 

目   次

1 引言 1

1。1 LFMCW雷达的优缺点 1

1。2 LFMCW雷达的研究动态及发展应用 3

1。3 本文的主要任务和内容安排 4

2 LFMCW雷达信号分析 5

2。1 LFMCW雷达的工作原理 5

2。2 LFMCW雷达发射信号常用波形对比选择 5

2。3 对称三角LFMCW雷达信号分析 6

2。4 本章小结 10

3 LFMCW雷达的距离-速度去耦合方法 11

3。1 MTD-频域配对法 11

3。2