Title :
Direct-Detection Optical OFDM Transmission System Without Frequency Guard Band
Author :
Cao, Zizheng ; Yu, Jianjun ; Wang, Wenpei ; Chen, Lin ; Dong, Ze
Author_Institution :
Key Lab. for Micro/Nano Opto-Electron. Devices of Minist. of Educ., Hunan Univ., Changsha, China
fDate :
6/1/2010 12:00:00 AM
Abstract :
Interleaver and turbo code techniques are used in high spectral-efficient direct-detection optical orthogonal frequency-division-multiplexing (OFDM) transmission systems allowing significant improvement of optical receiver sensitivity by mitigating the unbalanced noise distribution in subcarrier signals. The optical signal-to-noise ratio of 5.18 Gb/s, 7.77-Gb/s coded OFDM (5.18 Gb/s after decoding), and 7.77-Gb/s coded OFDM with interleaver (5.18 Gb/s after decoding) over 200-km single-mode fiber at a bit-error rate of 10-4 are 23.7, 18.0, and 17.1 dB, respectively.
Keywords :
OFDM modulation; interleaved codes; optical receivers; quadrature amplitude modulation; turbo codes; frequency guard band; interleaver; optical receiver sensitivity; spectral-efficient direct-detection optical OFDM transmission systems; turbo code techniques; 64 quadrature amplitude modulation (64QAM); Direct-detection (DD); interleaver; optical orthogonal frequency-division multiplexing (OOFDM); turbo codes;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2044656
