激光技术Issue(5)：698-702,5.DOI:10.7510/jgjs.issn.1001-3806.2014.05.026
弱湍流信道无线光通信分集接收合并技术
Combination of spatial diversity receiving technology of wireless optical communication in weak turbulence atmosphere channel
摘要
Abstract
In order to overcome the channel fade effect caused by the atmospheric turbulence , the free space optical ( FSO) system model with spatial diversity was analyzed based on intensity detection pulse position modulation ( PPM) in weak turbulence atmosphere .The calculating formula of slot error rate ( SER ) of the system without diversity was derived under PPM firstly .Then as a benchmark , under the case of independent and identical distribution , the average slot error rates of three linear combining technologies , i.e., the maximal ratio combing (MRC), equal gain combining (EGC) and selection combining ( SC) were compared by means of numerical simulation .The results show that the improvement of system by MRC is the best, followed by EGC and SC is poor.However, SC is simpler and more convenient.The technology of spatial diversity receiver combination is efficient to improve the performance of FSO and has strong ability of resistance to atmospheric channel fade , and is suited for optical wireless communications systems .关键词
光通信/弱湍流信道/脉冲位置调制/分集接收/误时隙率Key words
optical communication/weak turbulence atmosphere channel/pulse position modulation/diversity receive/slot error rate分类
信息技术与安全科学引用本文复制引用
刘洋,章国安..弱湍流信道无线光通信分集接收合并技术[J].激光技术,2014,(5):698-702,5.基金项目
国家自然科学基金资助项目（61371113）；交通运输部应用基础研究资助项目（2013-319-825-110）；江苏省普通高校研究生科研创新计划资助项目（ CXZZ13-0869）；南通大学研究生科技创新计划项目资助 （）
