Compensation of coherent DQPSK receiver imperfections

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 fr...

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Bibliographic Details
Published in2007 Digest of the IEEE/LEOS Summer Topical Meetings pp. 19 - 20
Main Authors Roudas, I., Sauer, M., Hurley, J., Mauro, Y., Raghavan, S.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2007
Subjects
Frequency estimation
Optical attenuators
Optical fiber polarization
Optical filters
Optical interferometry
Optical receivers
Optical signal processing
Optical transmitters
Optical variables control
Photoconductivity
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ISBN9781424409266
1424409268
ISSN1099-4742
DOI10.1109/LEOSST.2007.4288310

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Summary: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.
ISBN:9781424409266
1424409268
ISSN:1099-4742
DOI:10.1109/LEOSST.2007.4288310