A subcarriers allocation scheme for cognitive radio systems based on multi-carrier modulation

Tao Luo, Tao Jiang, Weidong Xiang, Hsiao-Hwa Chen

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Cognitive radio (CR) is a dynamic spectrum access technology as a solution to spectrum under-utilization problem in some licensed bands. Operating over an exceedingly wide spectrum, CR systems usually adopt multi-carrier modulation (MCM) to implement flexible channelization. Consequently, efficient channel allocation scheme becomes extremely important to an MCM based CR (MCM-CR) system. In this paper, a maximum likelihood detection model is developed to detect the presence and locations of licensed users (LUs) signals in the frequency domain. Performance of the detection model, including the optimal detection region, detection probability and false alarm probability, is analyzed. A one-order two-state Markovian chain model is proposed to predict channel status information. In particular, a novel subcarrier allocation scheme for MCM-CR systems is proposed, taking into account the confidence of channel estimation, quality of services (QoS) of rental users (RUs) and throughput To validate the analytical results, simulations have been conducted to show effectiveness of the proposed scheme.

Original languageEnglish
Article number4626307
Pages (from-to)3335-3340
Number of pages6
JournalIEEE Transactions on Wireless Communications
Volume7
Issue number9
DOIs
Publication statusPublished - 2008 Sep 1

Fingerprint

Subcarrier Allocation
Multicarrier
Radio systems
Cognitive Radio
Multicarrier modulation
Cognitive radio
Modulation
Dynamic Spectrum Access
Maximum Likelihood Detection
Channel Allocation
Detection Probability
Channel Estimation
False Alarm
Channel estimation
Maximum likelihood
Quality of Service
Confidence
Frequency Domain
Quality of service
Throughput

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

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abstract = "Cognitive radio (CR) is a dynamic spectrum access technology as a solution to spectrum under-utilization problem in some licensed bands. Operating over an exceedingly wide spectrum, CR systems usually adopt multi-carrier modulation (MCM) to implement flexible channelization. Consequently, efficient channel allocation scheme becomes extremely important to an MCM based CR (MCM-CR) system. In this paper, a maximum likelihood detection model is developed to detect the presence and locations of licensed users (LUs) signals in the frequency domain. Performance of the detection model, including the optimal detection region, detection probability and false alarm probability, is analyzed. A one-order two-state Markovian chain model is proposed to predict channel status information. In particular, a novel subcarrier allocation scheme for MCM-CR systems is proposed, taking into account the confidence of channel estimation, quality of services (QoS) of rental users (RUs) and throughput To validate the analytical results, simulations have been conducted to show effectiveness of the proposed scheme.",
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A subcarriers allocation scheme for cognitive radio systems based on multi-carrier modulation. / Luo, Tao; Jiang, Tao; Xiang, Weidong; Chen, Hsiao-Hwa.

In: IEEE Transactions on Wireless Communications, Vol. 7, No. 9, 4626307, 01.09.2008, p. 3335-3340.

Research output: Contribution to journalArticle

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