Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/602263
Title: Free-Space Optical Communications: Capacity Bounds, Approximations, and a New Sphere-Packing Perspective
Authors: Anas Chaaban;Jean-Marie Morvan;Mohamed-Slim Alouini
subject: capacity bounds|sphere-packing|Intensity-modulation
Year: 2016
Publisher: IEEE
Abstract: The capacity of the free-space optical channel is studied. A new recursive approach for bounding the capacity of the channel based on sphere-packing is proposed. This approach leads to new capacity upper bounds for a channel with a peak intensity constraint or an average intensity constraint. Under an average constraint only, the derived bound is tighter than an existing sphere-packing bound derived earlier by Farid and Hranilovic. The achievable rate of a truncated-Gaussian input distribution is also derived. It is shown that under both average and peak constraints, this achievable rate and the sphere-packing bounds are within a small gap at high SNR, leading to a simple high-SNR capacity approximation. Simple fitting functions that capture the best known achievable rate for the channel are provided. These functions can be of practical importance especially for the study of systems operating under atmospheric turbulence and misalignment conditions.
Description: 
URI: http://localhost/handle/Hannan/134866
http://localhost/handle/Hannan/602263
ISSN: 0090-6778
volume: 64
issue: 3
Appears in Collections:2016

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Title: Free-Space Optical Communications: Capacity Bounds, Approximations, and a New Sphere-Packing Perspective
Authors: Anas Chaaban;Jean-Marie Morvan;Mohamed-Slim Alouini
subject: capacity bounds|sphere-packing|Intensity-modulation
Year: 2016
Publisher: IEEE
Abstract: The capacity of the free-space optical channel is studied. A new recursive approach for bounding the capacity of the channel based on sphere-packing is proposed. This approach leads to new capacity upper bounds for a channel with a peak intensity constraint or an average intensity constraint. Under an average constraint only, the derived bound is tighter than an existing sphere-packing bound derived earlier by Farid and Hranilovic. The achievable rate of a truncated-Gaussian input distribution is also derived. It is shown that under both average and peak constraints, this achievable rate and the sphere-packing bounds are within a small gap at high SNR, leading to a simple high-SNR capacity approximation. Simple fitting functions that capture the best known achievable rate for the channel are provided. These functions can be of practical importance especially for the study of systems operating under atmospheric turbulence and misalignment conditions.
Description: 
URI: http://localhost/handle/Hannan/134866
http://localhost/handle/Hannan/602263
ISSN: 0090-6778
volume: 64
issue: 3
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7397995.pdf876.57 kBAdobe PDFThumbnail
Preview File
Title: Free-Space Optical Communications: Capacity Bounds, Approximations, and a New Sphere-Packing Perspective
Authors: Anas Chaaban;Jean-Marie Morvan;Mohamed-Slim Alouini
subject: capacity bounds|sphere-packing|Intensity-modulation
Year: 2016
Publisher: IEEE
Abstract: The capacity of the free-space optical channel is studied. A new recursive approach for bounding the capacity of the channel based on sphere-packing is proposed. This approach leads to new capacity upper bounds for a channel with a peak intensity constraint or an average intensity constraint. Under an average constraint only, the derived bound is tighter than an existing sphere-packing bound derived earlier by Farid and Hranilovic. The achievable rate of a truncated-Gaussian input distribution is also derived. It is shown that under both average and peak constraints, this achievable rate and the sphere-packing bounds are within a small gap at high SNR, leading to a simple high-SNR capacity approximation. Simple fitting functions that capture the best known achievable rate for the channel are provided. These functions can be of practical importance especially for the study of systems operating under atmospheric turbulence and misalignment conditions.
Description: 
URI: http://localhost/handle/Hannan/134866
http://localhost/handle/Hannan/602263
ISSN: 0090-6778
volume: 64
issue: 3
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7397995.pdf876.57 kBAdobe PDFThumbnail
Preview File