Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/657113
Title: On the Capacity of the Intensity-Modulation Direct-Detection Optical Broadcast Channel
Authors: Anas Chaaban;Zouheir Rezki;Mohamed-Slim Alouini
subject: optical broadcast|discrete inputs|truncated-Gaussian|capacity region|Intensity-modulation
Year: 2016
Publisher: IEEE
Abstract: The capacity of the intensity-modulation direct-detection optical broadcast channel (OBC) is investigated, under both average and peak intensity constraints. An outer bound on the capacity region is derived by adapting Bergmans' approach to the OBC. Inner bounds are derived by using superposition coding with either truncated-Gaussian (TG) distributions or discrete distributions. While the discrete distribution achieves higher rates, the TG distribution leads to a simpler representation of the achievable rate region. At high signal-to-noise ratio (SNR), it is shown that the TG distribution is nearly optimal. It achieves the symmetric-capacity within a constant gap (independent of SNR), which approaches half a bit as the number of users grows. It also achieves the capacity region within a constant gap. At low SNR, it is shown that on-off keying (OOK) with time-division multiple-access (TDMA) is optimal. This is interesting in practice since both OOK and TDMA have low complexity. At moderate SNR (typically [0,8] dB), a discrete distribution with a small alphabet size achieves fairly good performance.
Description: 
URI: http://localhost/handle/Hannan/151749
http://localhost/handle/Hannan/657113
ISSN: 1536-1276
volume: 15
issue: 5
Appears in Collections:2016

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Title: On the Capacity of the Intensity-Modulation Direct-Detection Optical Broadcast Channel
Authors: Anas Chaaban;Zouheir Rezki;Mohamed-Slim Alouini
subject: optical broadcast|discrete inputs|truncated-Gaussian|capacity region|Intensity-modulation
Year: 2016
Publisher: IEEE
Abstract: The capacity of the intensity-modulation direct-detection optical broadcast channel (OBC) is investigated, under both average and peak intensity constraints. An outer bound on the capacity region is derived by adapting Bergmans' approach to the OBC. Inner bounds are derived by using superposition coding with either truncated-Gaussian (TG) distributions or discrete distributions. While the discrete distribution achieves higher rates, the TG distribution leads to a simpler representation of the achievable rate region. At high signal-to-noise ratio (SNR), it is shown that the TG distribution is nearly optimal. It achieves the symmetric-capacity within a constant gap (independent of SNR), which approaches half a bit as the number of users grows. It also achieves the capacity region within a constant gap. At low SNR, it is shown that on-off keying (OOK) with time-division multiple-access (TDMA) is optimal. This is interesting in practice since both OOK and TDMA have low complexity. At moderate SNR (typically [0,8] dB), a discrete distribution with a small alphabet size achieves fairly good performance.
Description: 
URI: http://localhost/handle/Hannan/151749
http://localhost/handle/Hannan/657113
ISSN: 1536-1276
volume: 15
issue: 5
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7378985.pdf809.41 kBAdobe PDFThumbnail
Preview File
Title: On the Capacity of the Intensity-Modulation Direct-Detection Optical Broadcast Channel
Authors: Anas Chaaban;Zouheir Rezki;Mohamed-Slim Alouini
subject: optical broadcast|discrete inputs|truncated-Gaussian|capacity region|Intensity-modulation
Year: 2016
Publisher: IEEE
Abstract: The capacity of the intensity-modulation direct-detection optical broadcast channel (OBC) is investigated, under both average and peak intensity constraints. An outer bound on the capacity region is derived by adapting Bergmans' approach to the OBC. Inner bounds are derived by using superposition coding with either truncated-Gaussian (TG) distributions or discrete distributions. While the discrete distribution achieves higher rates, the TG distribution leads to a simpler representation of the achievable rate region. At high signal-to-noise ratio (SNR), it is shown that the TG distribution is nearly optimal. It achieves the symmetric-capacity within a constant gap (independent of SNR), which approaches half a bit as the number of users grows. It also achieves the capacity region within a constant gap. At low SNR, it is shown that on-off keying (OOK) with time-division multiple-access (TDMA) is optimal. This is interesting in practice since both OOK and TDMA have low complexity. At moderate SNR (typically [0,8] dB), a discrete distribution with a small alphabet size achieves fairly good performance.
Description: 
URI: http://localhost/handle/Hannan/151749
http://localhost/handle/Hannan/657113
ISSN: 1536-1276
volume: 15
issue: 5
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7378985.pdf809.41 kBAdobe PDFThumbnail
Preview File