On power allocation for dual-hop amplify-and-forward OFDM relay systems

Masato Saito; Chandra R N Athaudage; Jamie Scott Evans

doi:10.1109/GLOCOM.2008.ECP.789

On power allocation for dual-hop amplify-and-forward OFDM relay systems

Masato Saito
, Chandra R N Athaudage
, Jamie Scott Evans

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

10 Citations (Scopus)

Abstract

The solutions to an optimal power allocation problem in dual-hop amplify-and-forward (non-regenerative) OFDM relay systems over given channel gains are provided with a joint transmit power constraint. We analytically derive the allocated power to each hop/subcarrier that satisfies the Karush-Kuhn-Tucker (KKT) conditions by solving simultaneous equations. The solutions imply that at most 3(N) - 1 possible power allocation candidates could exist on both source and relay nodes satisfying KKT conditions when N is the number of subcarriers. Based on the solution, a sub-optimal power allocation method that selects only significant allocated power in strong subcarriers is proposed and achieves higher capacity (achievable rate) than conventional sub-optimal methods. As for the feasibility, the number of candidates to be evaluated is N in the proposed method.

Original language	English
Title of host publication	IEEE Global Telecommunications Conference (Globecom)
Editors	Kaminsky Bourgeois, Francis B Grosz
Place of Publication	New York NY USA
Publisher	IEEE, Institute of Electrical and Electronics Engineers
Pages	4112 - 4117
Number of pages	6
ISBN (Print)	9781424423248
DOIs	https://doi.org/10.1109/GLOCOM.2008.ECP.789
Publication status	Published - 2008
Externally published	Yes
Event	IEEE Global Telecommunications Conference 2008 - New Orleans, United States of America Duration: 30 Nov 2008 → 4 Dec 2008 https://ieeexplore.ieee.org/xpl/conhome/4697774/proceeding (Proceedings)

Conference

Conference	IEEE Global Telecommunications Conference 2008
Abbreviated title	IEEE GLOBECOM 2008
Country/Territory	United States of America
City	New Orleans
Period	30/11/08 → 4/12/08
Internet address	https://ieeexplore.ieee.org/xpl/conhome/4697774/proceeding (Proceedings)

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10.1109/GLOCOM.2008.ECP.789

Cite this

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title = "On power allocation for dual-hop amplify-and-forward OFDM relay systems",

abstract = "The solutions to an optimal power allocation problem in dual-hop amplify-and-forward (non-regenerative) OFDM relay systems over given channel gains are provided with a joint transmit power constraint. We analytically derive the allocated power to each hop/subcarrier that satisfies the Karush-Kuhn-Tucker (KKT) conditions by solving simultaneous equations. The solutions imply that at most 3(N) - 1 possible power allocation candidates could exist on both source and relay nodes satisfying KKT conditions when N is the number of subcarriers. Based on the solution, a sub-optimal power allocation method that selects only significant allocated power in strong subcarriers is proposed and achieves higher capacity (achievable rate) than conventional sub-optimal methods. As for the feasibility, the number of candidates to be evaluated is N in the proposed method.",

author = "Masato Saito and Athaudage, \{Chandra R N\} and Evans, \{Jamie Scott\}",

year = "2008",

doi = "10.1109/GLOCOM.2008.ECP.789",

language = "English",

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pages = "4112 -- 4117",

editor = "Kaminsky Bourgeois and Grosz, \{Francis B\}",

booktitle = "IEEE Global Telecommunications Conference (Globecom)",

publisher = "IEEE, Institute of Electrical and Electronics Engineers",

address = "United States of America",

note = "IEEE Global Telecommunications Conference 2008, IEEE GLOBECOM 2008 ; Conference date: 30-11-2008 Through 04-12-2008",

url = "https://ieeexplore.ieee.org/xpl/conhome/4697774/proceeding",

}

Saito, M, Athaudage, CRN & Evans, JS 2008, On power allocation for dual-hop amplify-and-forward OFDM relay systems. in K Bourgeois & FB Grosz (eds), IEEE Global Telecommunications Conference (Globecom). IEEE, Institute of Electrical and Electronics Engineers, New York NY USA, pp. 4112 - 4117, IEEE Global Telecommunications Conference 2008, New Orleans, Louisiana, United States of America, 30/11/08. https://doi.org/10.1109/GLOCOM.2008.ECP.789

On power allocation for dual-hop amplify-and-forward OFDM relay systems. / Saito, Masato; Athaudage, Chandra R N; Evans, Jamie Scott.
IEEE Global Telecommunications Conference (Globecom). ed. / Kaminsky Bourgeois; Francis B Grosz. New York NY USA: IEEE, Institute of Electrical and Electronics Engineers, 2008. p. 4112 - 4117.

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

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T1 - On power allocation for dual-hop amplify-and-forward OFDM relay systems

AU - Saito, Masato

AU - Athaudage, Chandra R N

AU - Evans, Jamie Scott

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Y1 - 2008

N2 - The solutions to an optimal power allocation problem in dual-hop amplify-and-forward (non-regenerative) OFDM relay systems over given channel gains are provided with a joint transmit power constraint. We analytically derive the allocated power to each hop/subcarrier that satisfies the Karush-Kuhn-Tucker (KKT) conditions by solving simultaneous equations. The solutions imply that at most 3(N) - 1 possible power allocation candidates could exist on both source and relay nodes satisfying KKT conditions when N is the number of subcarriers. Based on the solution, a sub-optimal power allocation method that selects only significant allocated power in strong subcarriers is proposed and achieves higher capacity (achievable rate) than conventional sub-optimal methods. As for the feasibility, the number of candidates to be evaluated is N in the proposed method.

AB - The solutions to an optimal power allocation problem in dual-hop amplify-and-forward (non-regenerative) OFDM relay systems over given channel gains are provided with a joint transmit power constraint. We analytically derive the allocated power to each hop/subcarrier that satisfies the Karush-Kuhn-Tucker (KKT) conditions by solving simultaneous equations. The solutions imply that at most 3(N) - 1 possible power allocation candidates could exist on both source and relay nodes satisfying KKT conditions when N is the number of subcarriers. Based on the solution, a sub-optimal power allocation method that selects only significant allocated power in strong subcarriers is proposed and achieves higher capacity (achievable rate) than conventional sub-optimal methods. As for the feasibility, the number of candidates to be evaluated is N in the proposed method.

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BT - IEEE Global Telecommunications Conference (Globecom)

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ER -

On power allocation for dual-hop amplify-and-forward OFDM relay systems

Abstract

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