Using LDPC-Coded modulation and coherent detection for ultra highspeed optical transmission

被引：49

作者：

Djordjevic, Ivan B. ^{[1
]}

Cvijetic, Milorad

Xu, Lei

Wang, Ting

机构：

[1] Univ Arizona, Dept Elect & Comp Engn, Tucson, AZ 85721 USA

[2] NEC Corp Ltd, Herndon, VA 20171 USA

[3] NEC Labs, Princeton, NJ 08540 USA

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2007年 / 25卷 / 11期

基金：

美国国家科学基金会;

关键词：

bit-interleaved coded modulation (BICM); coherent detection; low-density parity-check (LDPC) codes; optical communications;

D O I：

10.1109/JLT.2007.906791

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 propose the coded modulation schemes for ultrahigh-speed transmission (100 Gb/s and above) by using commercially available components operating at 40 gigasymbols/s. The bit-interleaved coded modulation in combination with the low-density. parity-check codes that are used as component codes has been applied. The modulation is based on either M-ary quadrature-amplitude modulation or M-ary phase-shift keying. Log, M bits are mapped into the corresponding signal constellation point using either Gray or natural mapping. The coherent detection scheme has been found to outperform the direct detection one and to provide an additional margin much needed for longer transmission distances or for application in an all-optical network scenario.

引用

页码：3619 / 3625

页数：7

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