Compensation of Frequency Offset for 16-QAM Optical Coherent Systems Using QPSK Partitioning

被引：63
|
作者：
Fatadin, Irshaad [1 ]
Savory, Seb J. [2 ]
机构：
[1] Natl Phys Lab, Teddington TW11 0LW, Middx, England
[2] UCL, UCL Elect & Elect Engn, Opt Networks Grp, London WC1E 7JE, England
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2011年 / 23卷 / 17期
关键词：
Carrier phase recovery; frequency offset; quadrature amplitude modulation (QAM); quaternary phase-shift keying (QPSK) partition; RECEIVERS;
D O I：
10.1109/LPT.2011.2158994
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：
The performance of a feed-forward carrier frequency recovery algorithm for 16-quadrature amplitude modulation (QAM) optical coherent systems is investigated using the quaternary phase-shift keying (QPSK) partition scheme. The frequency estimation technique, which employs only a subset of the 16-QAM symbols with the QPSK partition, is demonstrated to be effective when applied prior to the carrier phase recovery. Frequency offset of 10(-1) times the symbol rate is shown to be tolerable at a bit-error rate (BER) of 10(-3) with combined linewidths symbol duration products of 10(-4).
引用
收藏
页码：1246 / 1248
页数：3
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