## Abstract

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.

©2013 Optical Society of America

Full Article | PDF Article**OSA Recommended Articles**

Li Tao, Jianjun Yu, Qi Yang, Ming Luo, Zhixue He, Yufeng Shao, Junwen Zhang, and Nan Chi

Opt. Express **20**(28) 29665-29672 (2012)

Zhixue He, Xiang Li, Ming Luo, Rong Hu, Cai Li, Ying Qiu, Songnian Fu, Qi Yang, and Shaohua Yu

Opt. Express **24**(9) 9209-9217 (2016)

Zizheng Cao, Lei Zou, Lin Chen, and Jianjun Yu

J. Opt. Commun. Netw. **3**(9) 758-766 (2011)