Wide-Range Frequency Offset Estimation Algorithm for Optical Coherent Systems Using Training Sequence

Wide-Range Frequency Offset Estimation Algorithm for Optical Coherent Systems Using Training Sequence

A wide-range frequency offset estimation algorithm is proposed for optical coherent systems, which removes the modulated phase information from the received signal accurately using training sequence instead of traditional M th power operation. A large frequency offset approximating to ±0.5 times the...

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Veröffentlicht in:IEEE photonics technology letters 2012-01, Vol.24 (1), p.82-84
Hauptverfasser: Zhou, Xian, Chen, Xue, Long, Keping
Format: Artikel
Sprache:eng
Schlagworte:
Estimation
Frequency estimation
Frequency modulation
Frequency offset estimation
optical coherent systems
Optical receivers
Optical transmitters
Phase shift keying
Training
training sequence
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Zusammenfassung:A wide-range frequency offset estimation algorithm is proposed for optical coherent systems, which removes the modulated phase information from the received signal accurately using training sequence instead of traditional M th power operation. A large frequency offset approximating to ±0.5 times the symbol rate can be traced in arbitrary M -ary phase-shift-keying (MPSK) M -ary quadrature amplitude modulation (MQAM) systems by the proposed algorithm with the low computational complexity and the negligible training overhead.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2011.2172790