Compensation of coherent DQPSK receiver imperfections

Author

Roudas, I. ; Sauer, M. ; Hurley, J. ; Mauro, Y. ; Raghavan, S.

Author_Institution

Patras Univ., Patras

fYear

2007

fDate

23-25 July 2007

Firstpage

19

Lastpage

20

Abstract

This paper studies the impact of imperfections and impairments on the performance of a coherent phase-diversity DQPSK receiver. Experiments demonstrate that quadrature imbalance can be corrected by ellipse fitting and Gram-Schmidt-like orthogonalization. In addition, it is shown that intermediate frequency offset can be estimated using low complexity, feed-forward, least-square-error based algorithms.

Keywords

differential phase shift keying; least squares approximations; optical fibre communication; optical receivers; quadrature phase shift keying; DQPSK receiver; Gram-Schmidt-like orthogonalization; coherent receiver; ellipse fitting; feed-forward algorithm; intermediate frequency offset; least-square-error based algorithm; long-haul optical communication; low complexity algorithm; phase-diversity receiver; quadrature imbalance; receiver imperfections; Frequency estimation; Optical attenuators; Optical fiber polarization; Optical filters; Optical interferometry; Optical receivers; Optical signal processing; Optical transmitters; Optical variables control; Photoconductivity;

fLanguage

English

Publisher

ieee

Conference_Titel

IEEE/LEOS Summer Topical Meetings, 2007 Digest of the

Conference_Location

Portland, OR

ISSN

1099-4742

Print_ISBN

1-4244-0926-8

Electronic_ISBN

1099-4742

Type

conf

DOI

10.1109/LEOSST.2007.4288310

Filename

4288310