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Browse Journals & Magazines > Photonics Technology Letters, ...> Volume:21 Issue:15 Help

Laser Linewidth Tolerance of Decision-Aided Maximum Likelihood Phase Estimation in Coherent Optical M -ary PSK and QAM Systems

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4 Author(s)
Zhang, S. ; Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore ; Kam, P.Y. ; Yu, C. ; Chen, J.

This letter extends the decision-aided (DA) maximum likelihood (ML) phase estimation in an M -ary phase-shift keying (PSK) system to quadrature amplitude modulation (QAM) signals. The block length effect is simulated for both M-ary PSK and QAM systems, and also investigated in M -ary PSK systems through analysis. Our results show that the tolerance of DA ML to laser linewidth for square 16-QAM can be increased by >10 times compared to the block Mth power scheme.

Published in:
Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 15 )

Date of Publication: Aug.1, 2009

Page(s):
1075 - 1077
ISSN :
1041-1135
INSPEC Accession Number:
10779032
Digital Object Identifier :
10.1109/LPT.2009.2022750
Product Type:
Journals & Magazines
Date of Publication :
19 May 2009
Date of Current Version :
14 July 2009
Issue Date :
Aug.1, 2009
Sponsored by :
IEEE Photonics Society

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