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Proceedings Paper

Average power requirement of MPSK subcarrier modulation in wireless optical communications
Author(s): Dan Chen; Chenhao Wang
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Paper Abstract

A DC bias must be added to the multiple subcarrier modulated (MSM) system because of nonnegative performance of the optical intensity, which results in less power efficiency of MSM system. In this paper, three basic block code techniques and bias selection are described to improve the power utilization for MPSK subcarrier modulated optical system. The simulations demonstrate that the minimum power block code combined with time-varying bias has the best-performing performance when subcarrier number N≥ 3. In reserved subcarrier block code scheme, the minimum value of the normalized power requirement varying with the reserved subcarrier number L. The higher order of modulation, the more average power requirement could be got by block code than by choosing bias scheme. On the other hand, the performance of rate-compatible punctured convolutional code (RCPC) and combing code are also separately given. Compared to other coding techniques, RCPC combined with varying amplitude block code has lest normalized acquired power under time varying bias when N ≤ 4.

Paper Details

Date Published: 14 February 2019
PDF: 5 pages
Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 110480I (14 February 2019); doi: 10.1117/12.2518333
Show Author Affiliations
Dan Chen, Xi'an Univ. of Technology (China)
Chenhao Wang, Xi'an Univ. of Technology (China)

Published in SPIE Proceedings Vol. 11048:
17th International Conference on Optical Communications and Networks (ICOCN2018)
Zhaohui Li, Editor(s)

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