Optimal power allocation scheme for distributed antenna system with OFDM in frequency-selective fading channels

Xiangbin Yu; Hao Wang; Shu-Hung Leung; Tao Teng

doi:10.1049/el.2017.4513

Optimal power allocation scheme for distributed antenna system with OFDM in frequency-selective fading channels

Xiangbin Yu^*
, Hao Wang
, Shu-Hung Leung
, Tao Teng

^*Corresponding author for this work

Department of Electrical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

8 Citations (Scopus)

Abstract

Optimal power allocation (PA) scheme for distributed antenna systems with orthogonal frequency division multiplexing (DAS-OFDM) over frequency-selective fading channels is presented. The PA design is to optimise the transmit powers of subcarriers to maximise the capacity subject to the total power constraint. Based on the Karush–Kuhn–Tucker optimality conditions, the optimal PA to the distributed nodes for a subcarrier can be simplified to allocating the power to the node of the largest channel gain. With this result, an efficient algorithm is derived to obtain the optimal PA to the nodes for all the subcarriers of the DAS-OFDM. Compared with an existing suboptimal scheme, the developed scheme can obtain higher capacity and has lower complexity. By computer simulations, the effectiveness of the proposed scheme is verified.

Original language	English
Pages (from-to)	454-456
Journal	Electronics Letters
Volume	54
Issue number	7
Online published	27 Feb 2018
DOIs	https://doi.org/10.1049/el.2017.4513
Publication status	Published - 5 Apr 2018

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Full text of this publication does not contain sufficient affiliation information. With consent from the author(s) concerned, the Research Unit(s) information for this record is based on the existing academic department affiliation of the author(s).

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title = "Optimal power allocation scheme for distributed antenna system with OFDM in frequency-selective fading channels",

abstract = "Optimal power allocation (PA) scheme for distributed antenna systems with orthogonal frequency division multiplexing (DAS-OFDM) over frequency-selective fading channels is presented. The PA design is to optimise the transmit powers of subcarriers to maximise the capacity subject to the total power constraint. Based on the Karush–Kuhn–Tucker optimality conditions, the optimal PA to the distributed nodes for a subcarrier can be simplified to allocating the power to the node of the largest channel gain. With this result, an efficient algorithm is derived to obtain the optimal PA to the nodes for all the subcarriers of the DAS-OFDM. Compared with an existing suboptimal scheme, the developed scheme can obtain higher capacity and has lower complexity. By computer simulations, the effectiveness of the proposed scheme is verified.",

author = "Xiangbin Yu and Hao Wang and Shu-Hung Leung and Tao Teng",

note = "Full text of this publication does not contain sufficient affiliation information. With consent from the author(s) concerned, the Research Unit(s) information for this record is based on the existing academic department affiliation of the author(s).",

year = "2018",

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doi = "10.1049/el.2017.4513",

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journal = "Electronics Letters",

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TY - JOUR

T1 - Optimal power allocation scheme for distributed antenna system with OFDM in frequency-selective fading channels

AU - Yu, Xiangbin

AU - Wang, Hao

AU - Leung, Shu-Hung

AU - Teng, Tao

N1 - Full text of this publication does not contain sufficient affiliation information. With consent from the author(s) concerned, the Research Unit(s) information for this record is based on the existing academic department affiliation of the author(s).

PY - 2018/4/5

Y1 - 2018/4/5

N2 - Optimal power allocation (PA) scheme for distributed antenna systems with orthogonal frequency division multiplexing (DAS-OFDM) over frequency-selective fading channels is presented. The PA design is to optimise the transmit powers of subcarriers to maximise the capacity subject to the total power constraint. Based on the Karush–Kuhn–Tucker optimality conditions, the optimal PA to the distributed nodes for a subcarrier can be simplified to allocating the power to the node of the largest channel gain. With this result, an efficient algorithm is derived to obtain the optimal PA to the nodes for all the subcarriers of the DAS-OFDM. Compared with an existing suboptimal scheme, the developed scheme can obtain higher capacity and has lower complexity. By computer simulations, the effectiveness of the proposed scheme is verified.

AB - Optimal power allocation (PA) scheme for distributed antenna systems with orthogonal frequency division multiplexing (DAS-OFDM) over frequency-selective fading channels is presented. The PA design is to optimise the transmit powers of subcarriers to maximise the capacity subject to the total power constraint. Based on the Karush–Kuhn–Tucker optimality conditions, the optimal PA to the distributed nodes for a subcarrier can be simplified to allocating the power to the node of the largest channel gain. With this result, an efficient algorithm is derived to obtain the optimal PA to the nodes for all the subcarriers of the DAS-OFDM. Compared with an existing suboptimal scheme, the developed scheme can obtain higher capacity and has lower complexity. By computer simulations, the effectiveness of the proposed scheme is verified.

UR - https://www.scopus.com/pages/publications/85044657864

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U2 - 10.1049/el.2017.4513

DO - 10.1049/el.2017.4513

M3 - RGC 21 - Publication in refereed journal

SN - 0013-5194

VL - 54

SP - 454

EP - 456

JO - Electronics Letters

JF - Electronics Letters

IS - 7

ER -

Optimal power allocation scheme for distributed antenna system with OFDM in frequency-selective fading channels

Abstract

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GRF: Distributed MIMO Coordination for Next Generation Small-cell Networks

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Optimal power allocation scheme for distributed antenna system with OFDM in frequency-selective fading channels

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