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ID:31360043
大小:111.50 KB
页数:7页
时间:2019-01-09
《基于空间分集增益的分布式快速空频编码算法》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、基于空间分集增益的分布式快速空频编码算法 摘要:针对多点协作(CoMP)无线通信系统的下行传输问题,提出一种分布式快速空频编码(DF?SFC)的方案。通过将小区边缘用户分组和分享相邻小区间的子载波获得空间分集增益,有效缓解了载波间干扰(ICI),基于此设计分布式解码器,将用户的解码复杂度降低到相同的非分布式空频编码最佳解码器的50%。通过将所提方案与Alamouti多点协作和非多点协作方案做比较,对用户与其基站之间相对距离对比研究了可实现的传输速率,并且推断出它的性能上限和下限,用于确立小区边
2、缘用户的阈值,实现在提出的多点协作和非多点协作模式之间切换,以提高整体性能。仿真结果表明,在服务小区边缘用户方面提出的方案均优于Alamouti多点协作和非多点协作方案。 关键词:协作多点传输;载波间干扰;空频编码;子载波分配 中图分类号:TN919.3+1?34;TP391文献标识码:A文章编号:1004?373X(2016)23?0029?05 Distributedfastspace?frequencyencodingalgorithmbasedonspacediversitygai
3、n CHANGBenchao1,WANGDan2,YANGXinfeng3,4 (1.InformationManagementCenter,HuangheJiaotongUniversity,Jiaozuo454950,China; 2.DepartmentofInformationEngineering,HuangheJiaotong7University,Jiaozuo454950,China; 3.SchoolofComputerScienceandTechnology,Wuha
4、nUniversityofTechnology,Wuhan430070,China; 4.CollegeofComputerandInformationEngineering,NanyangInstituteofTechnology,Nanyang473004,China) Abstract:Aimingatthedownlinktransmissionproblemofthecoordinatedmulti?point(CoMP)wirelesscommunicationsystem,ad
5、istributedfastspace?frequencycoding(DF?SFC)schemeispresented.Thecell?edgeusersaregroupedandthesub?carriersamongneighborcellsaresharedtoobtainthespacesubsetgain,soastoalleviatetheinter?carrierinterference(ICI).Indistributeddecoderdesignbasedonaboveste
6、p,theuserdecodingcomplexityisreducedby50%ofthesamenon?distributedspace?frequencycodingoptimaldecoder.TheproposedschemeiscomparedwithAlamoutimultipointcooperationandnon?multipointcooperationschemes.Theachievabletransmissionrateoftherelativedistanceamo
7、ngtheuseranditsbasestationisstudied.Theperformanceupperandlowerlimitsareinferredtodeterminethethresholdofthecelledgeusers,realizetheswitchingbetweentheproposedmultipointcooperationmodeandnon?multipointcooperationmode,andimprovetheoverallperformance.T
8、hesimulationresultsshowthattheproposedschemeissuperiortothe7Alamoutimultipointcooperationandnon?multipointcoo?perationschemesinserviceforthecelledgeusers. Keywords:coordinatedmulti?pointtransmission;inter?carrierinterference;space?frequencycoding;su
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