Title :
Pilot-Aided Optical Signal-to-Noise Ratio Estimation for Direct-Detection OFDM Systems
Author :
Shuang Gao ; Lingchen Huang ; Chun-Kit Chan
Author_Institution :
Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Hong Kong, China
Abstract :
We propose an optical signal-to-noise ratio (OSNR) estimation method for direct-detection optical orthogonal frequency division multiplexing (DDO-OFDM) systems by calculating the electrical SNR of one pilot subcarrier based on correlation. Simulation and experiment are conducted to verify this OSNR estimation method in a 15-Gb/s DDO-OFDM system. The maximum OSNR estimation error is 0.8 dB within an OSNR range of 8-28 dB for 100- and 200-km transmission distances.
Keywords :
OFDM modulation; optical fibre networks; DDO-OFDM system; OFDM system direct detection; bit rate 15 Gbit/s; electrical SNR; optical orthogonal frequency division multiplexing; pilot aided optical signal-to-noise ratio estimation; pilot subcarrier; Adaptive optics; OFDM; Optical fibers; Optical noise; Optical receivers; Signal to noise ratio; Direct-Detection Optical OFDM; OSNR; direct-detection optical OFDM; optical performance monitoring;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2413365
