Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 24, Issue 12, Pages 4876-4884Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2006.883692
Keywords
coherent detection; homodyne detection; phase shift keying (PSK); receiver sensitivity; spectral efficiency
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Homodyne phase-shift-keying systems can achieve the best receiver sensitivity and the longest transmission distance among all optical communication systems. This paper reviews recent research efforts in the field and examines future possibilities that might lead toward potential practical use of these systems. Additionally, phase estimation techniques based on feed-forward phase recovery and digital delay-lock loop approaches are examined, simulated, and compared.
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