Title :
Pilot-aided log-likelihood ratio for LDPC coded M-QAM CO-OFDM system
Author :
Shengjiao Cao ; Pooi-Yuen Kam ; Changyuan Yu
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
Pilot-aided log-likelihood ratio as well as its approximation are derived for LDPC coded M-QAM CO-OFDM system with consideration of laser phase noise. Our metric performs better than the conventional metric in 16QAM and 64QAM simulation.
Keywords :
OFDM modulation; laser noise; modulation coding; optical modulation; parity check codes; phase noise; quadrature amplitude modulation; 16QAM; 64QAM; LDPC coded M-QAM CO-OFDM system; coherent optical OFDM; laser phase noise; low density parity check codes; pilot aided log-likelihood ratio; quadrature amplitude modulation; Bit error rate; Decoding; Laser noise; Measurement; OFDM; Parity check codes; Phase noise;
Conference_Titel :
Optical Fiber Communications Conference and Exhibition (OFC), 2014
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-5575-2994-7
DOI :
10.1364/OFC.2014.W3J.1
