Title :
Wide-Range Frequency Offset Estimation Algorithm for Optical Coherent Systems Using Training Sequence
Author :
Zhou, Xian ; Chen, Xue ; Long, Keping
Author_Institution :
Univ. of Sci. & Technol. Beijing (USTB), Beijing, China
Abstract :
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 Mth 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.
Keywords :
computational complexity; frequency estimation; optical communication; optical modulation; phase shift keying; quadrature amplitude modulation; M -ary quadrature amplitude modulation; arbitrary M-ary phase-shift-keying; computational complexity; modulated phase information; optical coherent systems; received signal; symbol rate; training overhead; training sequence; wide-range frequency offset estimation algorithm; Estimation; Frequency estimation; Frequency modulation; Optical receivers; Optical transmitters; Phase shift keying; Training; Frequency offset estimation; optical coherent systems; training sequence;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2172790
