Average power requirement of MPSK subcarrier modulation in wireless optical communications

Dan Chen; Chenhao Wang

doi:10.1117/12.2518333

14 February 2019 Average power requirement of MPSK subcarrier modulation in wireless optical communications

Dan Chen, Chenhao Wang

Proceedings Volume 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018); 110480I (2019) https://doi.org/10.1117/12.2518333
Event: 17th International Conference on Optical Communications and Networks (ICOCN2018), 2018, Zhuhai, China

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.

Citation Download Citation

Dan Chen and Chenhao Wang "Average power requirement of MPSK subcarrier modulation in wireless optical communications", Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 110480I (14 February 2019); https://doi.org/10.1117/12.2518333

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KEYWORDS

Modulation

Forward error correction

Optical communications

Wireless communications

Free space optics

Networks

Optical networks

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