空时编码在无线光MIMO通信系统中的实现的中期报告摘要：空时编码是一种提高无线光多输入多输出（MIMO）通信系统性能的关键技术，本文介绍了空时编码在无线光MIMO通信系统中的基本原理。首先介绍了空时编码的基本概念，然后讨论了空时编码的实现方式，包括利用奇异值分解（SVD）算法实现空时编码和使用线性预编码实现空时编码两种方法。此外，本文还研究了空时编码技术对无线光通信系统性能的影响，包括误码率和通信距离等方面的影响。最后，本文提出了未来研究的方向，为无线光通信系统的发展提供了一些启示。关键词：空时编码；无线光通信；多输入多输出；奇异值分解算法；线性预编码Abstract:Spatialcodingisakeytechnologytoimprovetheperformanceofwirelessopticalmultiple-inputmultiple-output(MIMO)communicationsystem.ThispaperintroducesthebasicprincipleofspatialcodinginwirelessopticalMIMOcommunicationsystem.First,thebasicconceptofspatialcodingisintroduced,andthentheimplementationmethodsofspatialcodingarediscussed,includingusingsingularvaluedecomposition(SVD)algorithmandlinearprecoding.Inaddition,thispaperalsostudiestheimpactofspatialcodingtechnologyontheperformanceofwirelessopticalcommunicationsystem,includingerrorrateandcommunicationdistance.Finally,thispaperproposesfutureresearchdirections,providingsomeinsightsforthedevelopmentofwirelessopticalcommunicationsystem.Keywords:spatialcoding;wirelessopticalcommunication;multiple-inputmultiple-output;singularvaluedecompositionalgorithm;linearprecoding.IntroductionWiththedevelopmentofwirelesscommunicationtechnology,wirelessopticalcommunicationhasbecomeanimportantresearchdirection.ComparedwithtraditionalRFcommunication,wirelessopticalcommunicationhastheadvantagesofhighbandwidthandlowinterference,whichhasgreatpotentialforfuturecommunicationsystems.However,wirelessopticalcommunicationfacesmanychallenges,suchasatmosphericturbulence,scattering,anddiffraction.Tosolvetheseproblems,multiple-inputmultiple-output(MIMO)technologyandspatialcodingtechnologyhavebeenproposedtoimprovetheperformanceofwirelessopticalcommunication.SpatialcodingtechnologyisakeytechnologyforMIMOcommunicationsystems,whichcaneffectivelyimprovethecapacityandreliabilityofwirelessopticalcommunicationsystems.Spatialcodingtechnologytakesadvantageofthespatialdiversityofmultipleantennastotransmitmultipledatastreamstothereceiverwithoutinterference.Inthispaper,thebasicp