Experimental demonstration of a real-time highthroughput digital DC blocker for compensating ADC imperfections in optical fast-OFDM receivers

被引：3

作者：

Zhang, Lu ^{[1
,2
,3
]}

Ouyang, Xing ^{[1
,2
]}

Shao, Xiaopeng ^{[3
]}

Zhao, Jian ^{[1
,2
]}

机构：

[1] Photon Syst Grp, Tyndall Natl Inst, Cork, Ireland

[2] Univ Coll Cork, Cork, Ireland

[3] Xidian Univ, Sch Phys & Optoelect Engn, Xian 710071, Peoples R China

来源：

OPTICS EXPRESS | 2016年 / 24卷 / 13期

基金：

爱尔兰科学基金会;

关键词：

TRANSMISSION;

D O I：

10.1364/OE.24.014215

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Performance degradation induced by the DC components at the output of real-time analogue-to-digital converter (ADC) is experimentally investigated for optical fast-OFDM receiver. To compensate this degradation, register transfer level (RTL) circuits for real-time digital DC blocker with 20GS/s throughput are proposed and implemented in field programmable gate array (FPGA). The performance of the proposed real-time digital DC blocker is experimentally investigated in a 15Gb/s optical fast-OFDM system with intensity modulation and direct detection over 40 km standard single-mode fibre. The results show that the fixed-point DC blocker has negligible performance penalty compared to the offline floating point one, and can overcome the error floor of the fast OFDM receiver caused by the DC components from the real-time ADC output. (C)2016 Optical Society of America

引用

页码：14215 / 14226

页数：12

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