基于m序列的LTI系统脉冲响应测试

***大学毕业设计（论文）-I-基于m序列的LTI系统脉冲响应测试摘要最长线性反馈移位寄存器序列简称m序列，是一种伪随机序列、伪噪声(PN)码或伪随机码。m序列是一种伪随机序列，在通信、雷达、密码学、系统脉冲响应等领域都有应用。本文主要介绍了m序列的基本性质，以及利用m序列进行系统脉冲响应测试的基本原理，并介绍了由MATLAB生成m序列的方法，以及在MATLAB环境下测试LTI系统脉冲响应的仿真过程。利用MATLAB高效的数据处理以及可编程功能，以及数据可视化功能，方便快捷直观的显示出了所需要的结果。此外，在文章的结尾设计了一个单片机生成m序列的电路。仿真结果显示，MATLAB、单片机均能生成m序列；相比较而言，由MATLAB程序简单，操作性强，而且其可视化技术使m序列更直观的显示出来。m序列应用广泛，相信随着研究的深入，一定有更为广阔的应用前景。关键词：m序列；脉冲响应测试；LTI系统基于m序列的LTI系统脉冲响应测试-II-LTISystemImpulseResponseTestBasedonmSequenceAbstractThelongestlinearfeedbackshiftregistersequence,hereinafterreferredtoasmsequenceisapseudorandomsequence,pseudonoise(PN)codeorpseudorandomcode.Msequenceisapseudorandomsequences,incommunication,radar,cryptography,systemimpulseresponse,andotherfieldsareused.Thisarticlemainlyintroducedthebasicpropertiesofmsequence,andtheuseofmsequence,thebasicprincipleofthesystemimpulseresponsetest,andthemethodofthemsequencegeneratedbytheMATLAB,andintheMATLABenvironmenttestofLTIsystemimpulseresponseofthesimulationprocess.UseofMATLABandefficientdataprocessingandprogrammablefunction,andthedatavisualizationfunction,convenientandquickandintuitiveresultsshowedaneed.Inaddition,attheendofthearticledesignamicrocontrollertogeneratemsequencecircuit.ThesimulationresultsshowthattheMATLAB,thesinglechipmicrocomputercanproducemsequence;Incomparison,byMATLABissimple,feasible,andthevisualizationtechnologymakemsequencemoreintuitivedisplay.Msequenceiswidelyused,believethatwiththedeepeningoftheresearch.Keywords:msequence;Impulseresponsetests;LTIsystems***大学毕业设计（论文）-III-目录引言..........................................................................................................................................1第1章绪论...........................................................................................................................21.1伪随机序列的背景和发展...................................................................................................................21.1.1伪随机序列应用和发展................................................................................................................21.1.2m序列...........................................................................................................................................21.2脉冲响应测试......................................................................................................................................3第2章m序列..........................................................................................................................42.1m序列的性质......................................................................................................................................42.1.1m序列的定义...............................................................................................................................42.1.2m序列的自相关特性...................................................................................................................52.2m序列的生成......................................................................................................................................52.2.1本源多项式...................................................................................................................................52.2.2由硬件生成m序列.....................................................................................................................62.2.3由软件生成m序列.....................................................................................................................62.3m序列法测量LTI系统脉冲响应原理...............................................................................................7第3章方案论证....................................................................................................................103.1m序列的产生及脉冲响应.............................................................................................................103.2LTI系统...........................................................................................................................................10第4章总体设计及仿真........................................................................................................124.1MATLAB生成m序列......................................................................................................................124.2仿真结果及分析................................................................................................................................144.3脉冲响应相关辨识............................................................................................................................15第5章单片机产生m序列...................................................................................................185.1AT89C52芯片简介.............................................................................................................................185.2硬件电路...........................................................................................................................................185.3电源电路...........................................................................................................................