毕业设计说明书中文摘要大时宽带宽积信号可解决雷达作用距离和距离分辨率之间的矛盾,被广泛应用于雷达系统中。多相码信号是一类具有相位跳变的大时宽带宽积信号，其具有良好低截获性能，其既具有较低的自相关函数旁瓣又有较大的多普勒容限，是一类性能优良的多相伪随机信号。78581

本文首先以巴克码和M序列为例介绍了二相编码信号，介绍了其时频域特性、给出了模糊图、模糊函数切割特性及其匹配处理的方法；然后分别研究了Frank多相码、Taylor码和P4码三种多相码信号，介绍了这三种信号的定义和时域频域特性，随后根据信号绘出多相码模糊图，分析信号的模糊函数切割性能和多普勒敏感性，最后研究了三种多相码信号的匹配滤波处理，仿真结果表明了多相码具有良好的脉压性能。

毕业论文关键词  低截获 Taylor码 Frank码 P4码

毕业设计说明书外文摘要

Title    Ploy-phase Coded Signal Analysis and Processing

Abstract The contradictions between operating range and range resolution of radar can be solved by large time-bandwidth product signal，the signal is widely used in radar systems。  Phase code signal is a kind of large time-bandwidth product signals with phase jump, which has a good low-interception performance, its autocorrelation function has low side-lobe and large Doppler tolerance。  The signal is a poly-phase pseudorandom signals with superior performance。

Firstly, Bi-phase coded signal is introduced as the cases of Barker code and M sequence。 The frequency-domain and time-domain characteristics, fuzzy graph, fuzzy graph cut and the matching processing method are given ; Taylor ploy-phase code, Frank ploy-phase code and P4 ploy-phase code are studied then。 Signals definition ,the frequency domain and time domain characteristics of these three signals are introduced。 And then, fuzzy cutting figures are given to analysis the performance and Doppler sensitivity。 At last matched filter handles of three poly-phase code signal are researched, simulation results show that the ploy-phase code signals have good pulse pressure performance。

Keywords  low-interception performance  Frank ploy-phase code  Taylor ploy-phase code  P4 ploy-phase code

目   次

1绪论 1

  1。1研究背景与意义1

  1。2国内外研究现状1

  1。3本文的主要内容及章节安排3

2二相编码信号的研究与分析4 

  2。1二相编码信号定义及模糊函数性能 4

  2。2巴克码的研究与分析6 

  2。3 M序列的研究与分析9

  2。4 二相编码信号匹配处理13

3  Taylor多相码的研究与分析15

  3。1 Taylor多相码定义及波形分析15

  3。2 Taylor多相码模糊图及性能分析17

  3。3 Taylor多相码信号匹配处理18

4  Frank多相码的研究与分析21

  4。1 Frank多相码定义及时域频域分析21

  4。2 Frank多相码模糊图及性能分析22

  4。3 Frank多相码信号匹配处理24

5  P4多相码的研究与分析26

  5。1 P4多相码定义及时域频域分析26

  5。2 P4多相码信号模糊图及性能分析26

  5。3 P4 多相码信号匹配处理28

结论  30

致谢  31

参考文献32

1  绪论