Title :
Blind Carrier Frequency Offset Estimation Based on Eighth-Order Statistics for Coherent Optical QAM Systems
Author :
Li, Ming ; Chen, Lian-Kuan
Author_Institution :
Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Hong Kong, China
Abstract :
We propose a carrier frequency offset estimation (FOE) algorithm based on eighth-order statistics for optical quadrature amplitude modulation (QAM) signals. The FOE algorithm does not involve fast Fourier transformation and can be implemented by hardware with little memory and computation resources. Simulation results show that in a 10.709-GBaud/s optical 16-QAM system, carrier frequency offset ranging between ± 1.25 GHz can be estimated with a uniform standard deviation of 2 MHz when the optical signal-to-noise ratio is 17 dB and 410 symbols are utilized.
Keywords :
optical engineering computing; optical fibre communication; quadrature amplitude modulation; statistical analysis; blind carrier frequency offset estimation; coherent optical QAM systems; eighth order statistics; optical signal-to-noise ratio; quadrature amplitude modulation; Adaptive optics; Fiber optics; Frequency estimation; Optical noise; Optical receivers; Optical transmitters; Quadrature amplitude modulation; Coherent detection; frequency estimation; optical fiber communication; quadrature amplitude modulation (QAM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2164788
