Optimal power allocation in OFDM-based cognitive radio systems

Peng Wang; Xiaofeng Zhong; Limin Xiao; Shidong Zhou; Jing Wang

Optimal power allocation in OFDM-based cognitive radio systems

Peng Wang
, Xiaofeng Zhong
, Limin Xiao
, Shidong Zhou
, Jing Wang

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

1 Scopus citations

Abstract

The primary user (PU) suffers interference from both in-band subcarriers and out-band subcarriers' sidelobes of secondary users (SU) in OFDM-based cognitive radio systems. An optimal power allocation scheme was developed to protect the PUs' performance while efficiently exploiting the spectrum opportunities. The scheme was obtained by solving a convex optimization problem. The effects of the subcarrier side lobe are included unlike in the iterative partitioned water-filling algorithm. Simulations show that the optimal power allocation scheme maximizes the channel capacity while satisfying the PUs' interference power constraints.

Original language	English
Pages (from-to)	1144-1147
Number of pages	4
Journal	Qinghua Daxue Xuebao/Journal of Tsinghua University
Volume	49
Issue number	8
State	Published - Aug 2009
Externally published	Yes

Keywords

Cognitive radio
Mobile communication
Opportunistic spectrum access
Orthogonal frequency-division multiplexing (OFDM)
Power allocation
Subcarrier sidelobe

Cite this

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title = "Optimal power allocation in OFDM-based cognitive radio systems",

abstract = "The primary user (PU) suffers interference from both in-band subcarriers and out-band subcarriers' sidelobes of secondary users (SU) in OFDM-based cognitive radio systems. An optimal power allocation scheme was developed to protect the PUs' performance while efficiently exploiting the spectrum opportunities. The scheme was obtained by solving a convex optimization problem. The effects of the subcarrier side lobe are included unlike in the iterative partitioned water-filling algorithm. Simulations show that the optimal power allocation scheme maximizes the channel capacity while satisfying the PUs' interference power constraints.",

keywords = "Cognitive radio, Mobile communication, Opportunistic spectrum access, Orthogonal frequency-division multiplexing (OFDM), Power allocation, Subcarrier sidelobe",

author = "Peng Wang and Xiaofeng Zhong and Limin Xiao and Shidong Zhou and Jing Wang",

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T1 - Optimal power allocation in OFDM-based cognitive radio systems

AU - Wang, Peng

AU - Zhong, Xiaofeng

AU - Xiao, Limin

AU - Zhou, Shidong

AU - Wang, Jing

PY - 2009/8

Y1 - 2009/8

N2 - The primary user (PU) suffers interference from both in-band subcarriers and out-band subcarriers' sidelobes of secondary users (SU) in OFDM-based cognitive radio systems. An optimal power allocation scheme was developed to protect the PUs' performance while efficiently exploiting the spectrum opportunities. The scheme was obtained by solving a convex optimization problem. The effects of the subcarrier side lobe are included unlike in the iterative partitioned water-filling algorithm. Simulations show that the optimal power allocation scheme maximizes the channel capacity while satisfying the PUs' interference power constraints.

AB - The primary user (PU) suffers interference from both in-band subcarriers and out-band subcarriers' sidelobes of secondary users (SU) in OFDM-based cognitive radio systems. An optimal power allocation scheme was developed to protect the PUs' performance while efficiently exploiting the spectrum opportunities. The scheme was obtained by solving a convex optimization problem. The effects of the subcarrier side lobe are included unlike in the iterative partitioned water-filling algorithm. Simulations show that the optimal power allocation scheme maximizes the channel capacity while satisfying the PUs' interference power constraints.

KW - Cognitive radio

KW - Mobile communication

KW - Opportunistic spectrum access

KW - Orthogonal frequency-division multiplexing (OFDM)

KW - Power allocation

KW - Subcarrier sidelobe

UR - https://www.scopus.com/pages/publications/69249222965

M3 - Article

AN - SCOPUS:69249222965

SN - 1000-0054

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JO - Qinghua Daxue Xuebao/Journal of Tsinghua University

JF - Qinghua Daxue Xuebao/Journal of Tsinghua University

IS - 8

ER -

Optimal power allocation in OFDM-based cognitive radio systems

Abstract

Keywords

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