A novel transform domain processing based channel estimation method for OFDM radio-over-fiber systems

被引：2

作者：

Tao, Li ^{[1
,2
]}

Yu, Jianjun ^{[1
,2
]}

Yang, Qi ^{[3
]}

Shao, Yufeng ^{[1
,2
]}

Zhang, Junwen ^{[1
,2
]}

Chi, Nan ^{[1
,2
]}

机构：

[1] Fudan Univ, Dept Commun Sci & Engn, Shanghai 200433, Peoples R China

[2] Fudan Univ, State Key Lab ASIC & Syst, Shanghai 200433, Peoples R China

[3] Wuhan Res Inst Post & Telecommun, State Key Lab Opt Commun Technol & Networks, Wuhan 430074, Peoples R China

来源：

OPTICS EXPRESS | 2013年 / 21卷 / 06期

关键词：

COHERENT OPTICAL OFDM; DFT-SPREAD OFDM;

D O I：

10.1364/OE.21.007478

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, a transform domain processing (TDP) based channel estimation method for orthogonal frequency-division multiplexing (OFDM) Radio-over-Fiber (RoF) systems is proposed. Theoretically investigation shows that TDP can greatly reduce the number of required training symbols. An 8 x 4.65 Gb/s multi-user OFDM RoF system over 40 km fiber link and 60 GHz wireless link is experimentally demonstrated utilizing TDP scheme. Compared with conventional time domain averaging (TDA) scheme, the overhead can be reduced from several tens of training symbols to merely one symbol and the receiver sensitivity has been improved by 1.8 dB at BER of 3.8 x 10(-3). The calculated BER performance for 8 wireless users clearly validates the feasibility of this TDP-based channel estimation method. (c) 2013 Optical Society of America

引用

页码：7478 / 7487

页数：10

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