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QoS-Based Spectrum Access Control in MIMO Cognitive Radio Networks

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Wireless Internet (WICON 2011)

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Abstract

Cognitive radio (CR) is a promising technique to solve the conflict between the scarcity and underutilization of spectrum. Underlay spectrum sharing is one of the most attractive schemes to increase the sum rate of cognitive users (CUs) as well as reduce the interference at primary users (PUs). However, the adoption of an empirical value as interference constraint may result in outage of PUs or degrade the performance of CUs. By introducing interference variables and calculating interference constraints according to the quality of service (QoS) of PUs with different transmission requirements in every slot, a QoS-based spectrum access control (QSAC) scheme for multi-input multi-output (MIMO) cognitive radio networks is proposed. Besides, CUs with larger signal-to- interference-ratio (SIR) are selected and block diagonalization (BD) is applied to enhance the sum rate of CR system. Performance analysis and simulation results show that, compared with previous methods, the QSAC scheme leads to improved performance of both achievable sum rate of CUs and outage probability of PUs with the same order of complexity, and the gain of achievable sum rate of CUs is about 33% when the total power of CR system is 100w.

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Authors and Affiliations

  1. Department of Information and Communication Engineering, Xi’an Jiaotong University, Xi’an, P.R. China

    Mei Rong & Shihua Zhu

Authors
  1. Mei Rong
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  2. Shihua Zhu
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Editor information

Editors and Affiliations

  1. Xi’an Jiaotong University, Xianning West Road 28, 710049, Xi’an, Shaanxi, China

    Pinyi Ren  & Chao Zhang  & 

  2. University of California, 3013 Kemper Hall, 95616, Davis, CA, USA

    Xin Liu

  3. Polytechnic Institute of New York University, 6 Metrotech Center, 11201, New York, NY, USA

    Pei Liu

  4. University of Nebraska-Lincoln, 200B Peter Kiewit Institute, 68588, Omaha, NE, USA

    Song Ci

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© 2012 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering

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Rong, M., Zhu, S. (2012). QoS-Based Spectrum Access Control in MIMO Cognitive Radio Networks. In: Ren, P., Zhang, C., Liu, X., Liu, P., Ci, S. (eds) Wireless Internet. WICON 2011. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 98. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30493-4_52

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  • DOI: https://doi.org/10.1007/978-3-642-30493-4_52

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-30492-7

  • Online ISBN: 978-3-642-30493-4

  • eBook Packages: Computer ScienceComputer Science (R0)

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