Tunnel visible light communication system utilizing frequency domain pre-equalization technique |
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Authors: | WANG Dong LI Chao and CHE Yue |
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Affiliation: | School of Information Science and Engineering, University of Jinan, Jinan 250022, China;Shandong Provincial Key Laboratory of Network-based Intelligent Computing, Jinan 250022, China,School of Information Science and Engineering, University of Jinan, Jinan 250022, China;Shandong Provincial Key Laboratory of Network-based Intelligent Computing, Jinan 250022, China and China Mobile Group Shandong Co., Ltd., Jinan 250101, China |
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Abstract: | Simultaneously improving the communication speed and equalizing the nonlinear frequency response are still challenging for tunnel visible light communication (TVLC) system. Here, we propose and numerically investigate a frequency domain pre-equalization scheme for discrete multitone (DMT) modulation TVLC system. The amplitude of each subscriber is appropriately pre-equalized by optimized nonlinear compensation parameters. Simulation results demonstrate that our proposed equalization technique can resist the channel attenuation of the signal high-frequency part and further flatten the nonlinear channel response. Without forward error correction technique, the bit error ratio (BER) performance can reach 7.66×10-6 in a 2.05 Gbit/s DMT-TVLC system. |
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