Dual-Stage Cascaded Frequency Offset Estimation for Digital Coherent Receivers

被引：11

作者：

Zhang, S. ^{[1
]}

Xu, L. ^{[2
]}

Yu, J. ^{[2
]}

Huang, M. -F. ^{[2
]}

Kam, P. Y. ^{[1
]}

Yu, C. ^{[1
,3
]}

Wang, T. ^{[2
]}

机构：

[1] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore

[2] NEC Labs Amer Inc, Princeton, NJ 08540 USA

[3] ASTAR, Inst Infocomm Res I2R, Singapore 138632, Singapore

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2010年 / 22卷 / 06期

关键词：

Coherent optical communication; frequency offset; timing recovery;

D O I：

10.1109/LPT.2010.2040171

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：

Frequency offset estimation is a key function in carrier phase recovery to enable digital coherent reception. We propose a novel, feed-forward, dual-stage frequency offset estimator, and demonstrate its performance through both simulation and experiment. Our simulation results show that the estimation range can be as large as 9 GHz for a 10.7-GBaud polarization-multiplexed (PolMux) quadrature phase-shift keying (QPSK) system. In addition, the widest range of 0.5 times the system symbol rate is achieved for the first time in an experimental 42.8-Gb/s coherent PolMux QPSK receiver.

引用

页码：401 / 403

页数：3

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