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Proceedings Paper

Cascaded constant modulus equalization algorithm in wireless optical communication systems
Author(s): Ce Meng; Haifeng Yao; Zhi Liu; Xiaolong Ni; Xinsong Xue
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Paper Abstract

When the optical signal is transmitted in atmospheric channel in the wireless optical communication (WOC) systems, the inter-symbol interference (ISI) will be caused by the atmospheric motion and the fading characteristics of the atmospheric channel. In addition, device noises such as photodetectors noises can also affect the signal in the real communication systems. It is difficult to eliminate both types of interference by the single equalization algorithm at the same time, therefore, a cascaded equalization algorithm is proposed. First of all, we use the MATLAB to simulate the cascaded equalization algorithm, the convergence performance of the algorithm is analyzed, the bit error rate (BER) under different signal-to-noise ratios (SNR) are also compared. Then, the algorithm is verified under laboratory conditions, we calculate the BER of the receiving signal, which is processed by the cascade equalization algorithm. The simulation analysis and experiments results show that, the convergence performance of the cascaded equalization algorithm is improved effectively, the ISI is decrease, the BER can reduce to about 10-8 , decreased by 4 orders of magnitude than without equalization. It can improve the communication performance of the WOC systems, the validation of the cascaded equalization algorithm is verified.

Paper Details

Date Published: 7 November 2018
PDF: 6 pages
Proc. SPIE 10832, Fifth Conference on Frontiers in Optical Imaging Technology and Applications, 1083219 (7 November 2018); doi: 10.1117/12.2511376
Show Author Affiliations
Ce Meng, Changchun Univ. of Science and Technology (China)
Haifeng Yao, Changchun Univ. of Science and Technology (China)
Zhi Liu, Changchun Univ. of Science and Technology (China)
Xiaolong Ni, Changchun Univ. of Science and Technology (China)
Xinsong Xue, Changchun Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 10832:
Fifth Conference on Frontiers in Optical Imaging Technology and Applications
Junhao Chu; Wenqing Liu; Huilin Jiang, Editor(s)

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