Joint Subcarrier and Power Allocation for Uplink Spectrum Sharing in Cognitive OFDM Networks: A Waterfilling Based Approach

Yue Huai Ma; Bin  Zhang; Wei  Zhang; Meng Xiang Xu

doi:10.4028/www.scientific.net/AMR.756-759.1979

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 756-759Joint Subcarrier and Power Allocation for Uplink...

Joint Subcarrier and Power Allocation for Uplink Spectrum Sharing in Cognitive OFDM Networks: A Waterfilling Based Approach

Abstract:

In this paper, the subcarrier and power allocation problem for the orthogonal frequency division multiplexing (OFDM) cognitive radio network which coexists with the primary network is studied. A cognitive waterfilling (CWF) power allocation algorithm which based upon the classical waterfilling mechanism is proposed for the single SU scenario. As for multi-SU case, we present an efficient joint subcarrier and power allocation algorithm called MS-CWF algorithm. Simulation results show the effectiveness of the proposed CWF and MS-CWF algorithms.

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Periodical:

Advanced Materials Research (Volumes 756-759)

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1979-1983

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https://doi.org/10.4028/www.scientific.net/AMR.756-759.1979

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September 2013

Authors:

Yue Huai Ma, Bin Zhang, Wei Zhang, Meng Xiang Xu

Keywords:

Cognitive Radio (CR), OFDMA, Power Allocation, Subcarrier, Waterfilling

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