摘要
信道均衡是光通信的关键技术之一。信道均衡能有效地克服信息传输中的多径干扰和消除码间串扰,适合于数据传输。本文针对室内可见光通信系统中由信道失真引起的严重的码间串扰(ISI)情况,研究迫零均衡(ZFE)、最小均方误差(MMSE)均衡、判决反馈均衡(DFE)3种均衡技术,并利用计算机仿真对3种均衡技术的性能进行评估。仿真结果表明,判决反馈均衡器具有明显的优越性。
Channel equalization is a key technology in optical communications. Equalization has a good perfor mance in dealing with multi-path disturbance and Inter Symbol Interference (ISI), and is suitable for data transmission. Based on the channel distortion which results in severe inter symbol interference (ISI) in indoor visible communications, this paper studies three equalization technologies of zero forcing (ZF) equalization, minimum mean square error (MMSE) equalization and decision feedback equalization (DFE), evaluates the performance of the proposed theory by computer simulation. The experiment results show the superiority of decision feedback equalization.
出处
《信息化研究》
2011年第2期29-32,38,共5页
INFORMATIZATION RESEARCH
基金
上海交通大学"区域光纤通信网与新型光通信系统"国家重点实验室开放课题"室内可见光通信关键技术研究"(编号:2008SH6)
南京航空航天大学研究生创新基地开放基金课题"室内无线可见光通信抗多径传输技术研究"
关键词
光通信
信道均衡
迫零均衡
码间干扰
最小均方误差均衡
判决反馈均衡
optical communication
channel equalization
ZF equalization
inter symbol interference (ISI)
MMSE equalization
decision feedback egualization(DFE)