NDLI: Free-space optical communications with peak and average constraints: High SNR capacity approximation

Content Provider	IEEE Xplore Digital Library
Author	Chaaban, A. Morvan, J.-M. Alouini, M.S.
Copyright Year	2015
Description	Author affiliation: Div. of Comput., Electr., & Math. Sci. & Eng., King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia (Chaaban, A.; Morvan, J.-M.; Alouini, M.S.)
Abstract	The capacity of the intensity-modulation direct-detection (IM-DD) free-space optical channel with both average and peak intensity constraints is studied. A new capacity lower bound is derived by using a truncated-Gaussian input distribution. Numerical evaluation shows that this capacity lower bound is nearly tight at high signal-to-noise ratio (SNR), while it is shown analytically that the gap to capacity upper bounds is a small constant at high SNR. In particular, the gap to the high-SNR asymptotic capacity of the channel under either a peak or an average constraint is small. This leads to a simple approximation of the high SNR capacity. Additionally, a new capacity upper bound is derived using sphere-packing arguments. This bound is tight at high SNR for a channel with a dominant peak constraint.
Starting Page	73
Ending Page	77
File Size	300039
Page Count	5
File Format	PDF
e-ISBN	9781467377263
DOI	10.1109/IWOW.2015.7342269
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-09-07
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Upper bound Channel capacity Conferences Random variables Yttrium Signal to noise ratio High-speed optical techniques
Content Type	Text
Resource Type	Article

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