Rate and power allocation for discrete-rate link adaptation

Anders Gjendemsjø; Geir E. Øien; Henrik Holm; Mohamed Slim Alouini; David Gesbert; Kjell J. Hole; Pål Orten

doi:10.1155/2008/394124

Rate and power allocation for discrete-rate link adaptation

Anders Gjendemsjø^*, Geir E. Øien, Henrik Holm, Mohamed Slim Alouini, David Gesbert, Kjell J. Hole, Pål Orten

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Link adaptation, in particular adaptive coded modulation (ACM), is a promising tool for bandwidth-efficient transmission in a fading environment. The main motivation behind employing ACM schemes is to improve the spectral efficiency of wireless communication systems. In this paper, using a finite number of capacity achieving component codes, we propose new transmission schemes employing constant power transmission, as well as discrete- and continuous-power adaptation, for slowly varying flat-fading channels. We show that the proposed transmission schemes can achieve throughputs close to the Shannon limits of flat-fading channels using only a small number of codes. Specifically, using a fully discrete scheme with just four codes, each associated with four power levels, we achieve a spectral efficiency within 1dB of the continuous-rate continuous-power Shannon capacity. Furthermore, when restricted to a fixed number of codes, the introduction of power adaptation has significant gains with respect to average spectral efficiency and probability of no transmission compared to a constant power scheme.

Original language	English (US)
Article number	394124
Journal	EURASIP Journal on Wireless Communications and Networking
Volume	2008
DOIs	https://doi.org/10.1155/2008/394124
State	Published - 2008
Externally published	Yes

Bibliographical note

Funding Information:
The Project Wonderland is supported by Darkstar and jVoiceBridge for distribution of multimedia information. Project Wonderland technology visualizes information in 3D by showing dynamically generated 3D graphics. Darkstar gives it ability to run on large servers and support massive databases, and jVoiceBridge handles audio communication (VoIP).The proposed enriching cyberspace or enriching Web is based on assessing situations of remote users through fusing information of multiple biological sensors and the related user profile. Our approach is evaluated by checking if the cyberspace environment of the Project Wonderland can be enriched to prevent/deal with misunderstandings in web-based collaborative systems, using multiple biological sensors that are handy in operation and reasonable in cost for web users.

ASJC Scopus subject areas

Signal Processing
Computer Science Applications
Computer Networks and Communications

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10.1155/2008/394124

Cite this

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title = "Rate and power allocation for discrete-rate link adaptation",

abstract = "Link adaptation, in particular adaptive coded modulation (ACM), is a promising tool for bandwidth-efficient transmission in a fading environment. The main motivation behind employing ACM schemes is to improve the spectral efficiency of wireless communication systems. In this paper, using a finite number of capacity achieving component codes, we propose new transmission schemes employing constant power transmission, as well as discrete- and continuous-power adaptation, for slowly varying flat-fading channels. We show that the proposed transmission schemes can achieve throughputs close to the Shannon limits of flat-fading channels using only a small number of codes. Specifically, using a fully discrete scheme with just four codes, each associated with four power levels, we achieve a spectral efficiency within 1dB of the continuous-rate continuous-power Shannon capacity. Furthermore, when restricted to a fixed number of codes, the introduction of power adaptation has significant gains with respect to average spectral efficiency and probability of no transmission compared to a constant power scheme.",

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note = "Funding Information: The Project Wonderland is supported by Darkstar and jVoiceBridge for distribution of multimedia information. Project Wonderland technology visualizes information in 3D by showing dynamically generated 3D graphics. Darkstar gives it ability to run on large servers and support massive databases, and jVoiceBridge handles audio communication (VoIP).The proposed enriching cyberspace or enriching Web is based on assessing situations of remote users through fusing information of multiple biological sensors and the related user profile. Our approach is evaluated by checking if the cyberspace environment of the Project Wonderland can be enriched to prevent/deal with misunderstandings in web-based collaborative systems, using multiple biological sensors that are handy in operation and reasonable in cost for web users.",

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AU - Holm, Henrik

AU - Alouini, Mohamed Slim

AU - Gesbert, David

AU - Hole, Kjell J.

AU - Orten, Pål

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N2 - Link adaptation, in particular adaptive coded modulation (ACM), is a promising tool for bandwidth-efficient transmission in a fading environment. The main motivation behind employing ACM schemes is to improve the spectral efficiency of wireless communication systems. In this paper, using a finite number of capacity achieving component codes, we propose new transmission schemes employing constant power transmission, as well as discrete- and continuous-power adaptation, for slowly varying flat-fading channels. We show that the proposed transmission schemes can achieve throughputs close to the Shannon limits of flat-fading channels using only a small number of codes. Specifically, using a fully discrete scheme with just four codes, each associated with four power levels, we achieve a spectral efficiency within 1dB of the continuous-rate continuous-power Shannon capacity. Furthermore, when restricted to a fixed number of codes, the introduction of power adaptation has significant gains with respect to average spectral efficiency and probability of no transmission compared to a constant power scheme.

AB - Link adaptation, in particular adaptive coded modulation (ACM), is a promising tool for bandwidth-efficient transmission in a fading environment. The main motivation behind employing ACM schemes is to improve the spectral efficiency of wireless communication systems. In this paper, using a finite number of capacity achieving component codes, we propose new transmission schemes employing constant power transmission, as well as discrete- and continuous-power adaptation, for slowly varying flat-fading channels. We show that the proposed transmission schemes can achieve throughputs close to the Shannon limits of flat-fading channels using only a small number of codes. Specifically, using a fully discrete scheme with just four codes, each associated with four power levels, we achieve a spectral efficiency within 1dB of the continuous-rate continuous-power Shannon capacity. Furthermore, when restricted to a fixed number of codes, the introduction of power adaptation has significant gains with respect to average spectral efficiency and probability of no transmission compared to a constant power scheme.

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Rate and power allocation for discrete-rate link adaptation

Abstract

Bibliographical note

ASJC Scopus subject areas

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