Title :
Channel estimation and compensation in chromatic dispersion limited optical fast OFDM systems
Author :
Zhao, Jian ; Ellis, Andrew D.
Author_Institution :
Dept. of Phys., Univ. Coll. Cork, Cork, Ireland
Abstract :
We experimentally investigate the channel estimation and compensation in a chromatic dispersion (CD) limited 20Gbit/s optical fast orthogonal frequency division multiplexing (F-OFDM) system with up to 840km transmission. It is shown that symmetric extension based guard interval (GI) is required to enable CD compensation using one-tap equalizers. As few as one optical F-OFDM symbol with four and six pilot tones per symbol can achieve near-optimal channel estimation and compensation performance for 600km and 840km respectively.
Keywords :
OFDM modulation; channel estimation; equalisers; optical dispersion; optical modulation; CD compensation; bit rate 20 Gbit/s; chromatic dispersion limited optical F-OFDM systems; guard interval; near-optimal channel compensation performance; near-optimal channel estimation performance; one-tap equalizers; optical F-OFDM symbol; optical fast orthogonal frequency division multiplexing system; pilot tones; Channel estimation; Discrete cosine transforms; OFDM; Optical attenuators; Optical fibers; Optical noise;
Conference_Titel :
Communication Systems, Networks & Digital Signal Processing (CSNDSP), 2012 8th International Symposium on
Conference_Location :
Poznan
Print_ISBN :
978-1-4577-1472-6
DOI :
10.1109/CSNDSP.2012.6292660
