A Performance Investigation of Adaptive Phase Estimations in Coherent Optical Communications

Author

Zhang, Shaoliang ; Xu, Lei ; Kam, Pooi Yuen ; Yu, Changyuan ; Chen, Jian ; Wang, Ting

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore

Volume

23

Issue

8

fYear

2011

fDate

4/15/2011 12:00:00 AM

Firstpage

462

Lastpage

464

Abstract

We carried out a comprehensive analysis to examine the phase error variances in three adaptive phase estimation (PE) methods: the adaptive decision-aided PE, the Kalman PE, and the normalized least-mean square PE algorithms. The results show that they share the same phase error variances but with different approaches to determine the stepsize. Their performances in different quadrature amplitude modulation formats are analytically investigated for the purpose of determining the laser linewidth tolerance.

Keywords

Kalman filters; adaptive estimation; least mean squares methods; optical communication; optical modulation; optical receivers; phase estimation; quadrature amplitude modulation; Kalman phase estimation; adaptive decision-aided phase estimation; coherent optical communications; laser linewidth tolerance; normalized least-mean square phase estimation; optical receivers; phase error variances; quadrature amplitude modulation; Adaptive receiver; coherent detection; laser phase noise; phase estimation (PE); quadrature amplitude modulation (QAM);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2109058

Filename

5703109