Title :
Dual-stage decision-directed phase estimator enabling perfect frequency-offset elimination in digital coherent optical receivers
Author :
Mori, Yojiro ; Kikuchi, Kazuro
Author_Institution :
Univ. of Tokyo, Tokyo, Japan
Abstract :
We propose a dual-stage phase estimator controlled by the decision-directed LMS algorithm in digital coherent optical receivers. Simulations and experiments show that our proposed scheme can perfectly eliminate arbitrary frequency offsets in higher-order QAM systems.
Keywords :
least mean squares methods; optical receivers; phase estimation; quadrature amplitude modulation; decision-directed LMS algorithm; digital coherent optical receivers; dual-stage decision-directed phase estimator; higher-order QAM systems; least mean square; perfect frequency-offset elimination; quadrature-amplitude modulation; Bit error rate; Frequency estimation; Frequency modulation; Optical attenuators; Optical receivers; Optical transmitters; Phase noise;
Conference_Titel :
Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4799-0457-0
