一种基于对称PN码设计的时间同步系统及Simulink仿真

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中图分类号：TN929.5 文献标志码：A文章编号：1003-3114（2025）04-0870-07

doi：10.3969/j. issn.1003-3114.2025.04.025

Abstract：Aimingattheproblemof iaccrate synchronizationsamplingandpoorreceptionprformancecausedbynoiseinteferencein wirelessommuicationste，ashozatiosaplingstesdonsmetriceudo-iseP）codsignisproposddSi ulinksoftwareispliedtoompletetesiulationdesignofteetireommuncationlinkFistlypolaritysmmericPcodeispro posedbasedonautocorelationcharacteristicsofpseudo-randomsequences（PNcodes）Secondly，atimesychonzationsystembasedon symmetricPNcodusingSimulinkisdsigned.Takingte8SKmodulationmethodasanexample，afulinkcommunicationsstincludingwaveformgeneration，bestsampling，symbolsychozation，anddatadmodulationissimulatedThestemproposesnncd slidingwindowpostongalgoasednsmeticharactesisofcodestoimproveepliudeofutocoelaiopas reducethe probabilityof synchronous wordfalsecapturecausedbynoiseinterference.Finally，simulationresultsshowthatunderhesame noiseinterferenceconditions，comparedwiththeunipolarPNcodeandWalshcodedesignmethods，thetimesynchonizationsystemhas higherframesynchronzationaccuracy，andthereceivererorrateperformancealsohasasignificant improvementofmorethan2dB.

Keywords：symmetric PN code; synchronous;best sampling point；8PSK；simulation in Simulink

0 中 引言

在现代无线通信系统中，信号传输距离远、干扰源复杂的情况普遍存在，严重影响用户数据的传输质量稳定性[1-2]。（剩余7851字）