Viterbi equalizer with analytically calculated branch metrics for optical ASK and DBPSK

被引：11

作者：

Freckmann, T ^{[1
]}

Speidel, J ^{[1
]}

机构：

[1] Univ Stuttgart, Inst Telecommun, D-70569 Stuttgart, Germany

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2006年 / 18卷 / 1-4期

关键词：

maximum likelihood sequence estimation (MLSE); probability density function (pdf); Viterbi equalizer (VE);

D O I：

10.1109/LPT.2005.860054

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We analytically derive probability density functions of the sampled electrically filtered photo current for optical amplitude-shift keying and differential binary phase-shift keying using the Karhunen-Loeve series expansion method. This allows us to determine exact branch metrics for a Viterbi equalizer. We then compare the performance of histogram-based Viterbi equalizers with those using analytically calculated branch metrics.

引用

页码：277 / 279

页数：3

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