Title :
Analysis of OSNR margin improvement in beyond 100Gb/s PDM-DQPSK systems due to FEC
Author :
Chang, Deyuan ; Yu, Fan ; Huang, Yuanda ; Mao, Bangning ; Fang, Yuanyuan ; Zeng, Li ; Xiong, Qianjin
Author_Institution :
Network Research Department, Huawei Technologies Co., Ltd., Shenzhen, 518129, China
Abstract :
The OSNR margin improvements due to FEC limit elevation in 112Gb/s PDM-DQPSK systems under two different receiver schemes, direct detection and coherent detection with digital signal processing (DSP), are analyzed. FEC limit elevation provides more benefit to the direct detection scheme than to the coherent detection scheme in 112Gb/s PDM-RZ-DQPSK system. For the cases of non-ideal receivers employment and long haul fiber link transmission, FEC performance improvement is more profitable than that for the ideal BtB case.
Keywords :
Digital signal processing; Forward error correction; Optical filters; Optical interferometry; Optical modulation; Optical noise; Optical receivers; Optical transmitters; Polarization; Signal to noise ratio; FEC; PDM-DQPSK; coherent detection; direct detection;
Conference_Titel :
Communications and Photonics Conference and Exhibition (ACP), 2009 Asia
Conference_Location :
Shanghai, China
Print_ISBN :
978-1-55752-877-3
Electronic_ISBN :
978-1-55752-877-3
