Enhanced Performance of CAP System Using an Overlap Frequency-Domain Equalization Scheme

被引：6
|
作者：
He, Jing [1 ]
Dong, Huan
Deng, Rui
Li, Teng
Chen, Lin
机构：
[1] Hunan Univ, Minist Educ China, Key Lab Micro Nano Optoelect Device, Changsha 410082, Hunan, Peoples R China
来源：
IEEE PHOTONICS JOURNAL | 2016年 / 8卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Carrier-less amplitude phase (CAP) modulation; overlap frequency-domain equalization (OFDE); negative chirp; intensity modulation and direct detection (IMDD); AMPLITUDE-PHASE MODULATION; TRANSMISSION; COMMUNICATION; CHIRP;
D O I：
10.1109/JPHOT.2016.2544541
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, an overlap frequency-domain equalization (OFDE) scheme is proposed and experimentally demonstrated in an intensity modulation and direct-detection optical communication system with carrierless amplitude and phase (CAP) modulation. Moreover, the negative chirp property of the Mach-Zehnder modulator (MZM) for a CAP32/64/128 system is also investigated. After 100-km standard single-mode fiber transmission, the experimental results show that at the bit error ratio (BER) of 3.8 x 10(-3), the receiver sensitivities can be improved by 0.6 and 0.4 dB for CAP32 and CAP64 systems by utilizing the OFDE method, respectively. In addition, the receiver sensitivity is improved by 0.5 dB for CAP128 system at the bit error ratio (BER) of 2.4 x 10(-2). Compared with the FDE based on cyclic prefix (CP), the spectral efficiency of the CAP system with the OFDE scheme can be improved by 12.18%.
引用
收藏
页数：8
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