## 基于FPGA的调频多普勒定距信号处理

Title FM Doppler Ranging Technology Based on FPGA Technique
Abstract
The FM microwave proximity fuze is a fuze which transmits frequency modulated continuous wave signal, and this fuze has well property of distance selection, so the research of FM fuze has important theoretical and practical meaning.
In this paper, FM fuze for triangular modulation is studied, and the contradiction between traditional fuse performance and parameters is discussed. Based on the detailed derivation and analysis of the the post-mix signal Fourier expansion, comparison of harmonic ranging scheme is proposed. Using harmonic compared FM doppler fuze signal processing technology, along with FPGA technique, a specific harmonic is processed to abtain doppler signal. According the doppler signal, the range and speed information can be caculated. In this paper, theoretical simulation is done for the scheme, and it is proved to be feasible. The triangle wave generated module and the signal processing module are designed with functional simulation. 源自六[维^论'文]网.加7位QQ3249'114 www.lwfree.cn
Keywords： Harmonic, Analysis of the Post-Mix Signal, FPGA, Signal Processing

1  绪论    1
1.1  调频引信测距原理    1
1.2  FPGA及相关介绍    3
1.3    本文工作和各文章节主要内容    5
2  调频多普勒定距原理    6
2.1  概述    6
2.2  三角波调制方式的差频理论分析    6
2.2.1  静止目标差频理论分析    6
2.2.2  运动目标差频理论分析    11
2.3  调频多普勒定距方案    13
2.4  本章小结    14
3  调频多普勒定距各模块设计    15
3.1  概述    15
3.2  三角波发生器模块    15
3.2.1  三角波产生原理    15
3.2.2  三角波发生器电路设计    16
3.3.1  带通采样定理    17
3.4  FIR带通滤波器模块    23
3.4.1  数字滤波器设计介绍    23
3.4.2  FIR滤波器的MATLAB设计    25
3.4.3  FIR滤波器电路仿真    27
3.4.4  FIR滤波器程序设计    29
3.5    本章小结    31
4  仿真试验    32
4.1  仿真系统简介    32
4.2  仿真试验结果    33

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