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Simultaneous Power and Subchannel Allocation in Interference Limited OFDM-Based Cognitive Radio Network with Quality of Service Considerations

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Abstract

Despite the ever increasing demand for radio spectrum we are not able to achieve complete efficiency in utilizing the spectrum. The spectrum itself being restricted can only accommodate limited number of users. Therefore, it is very critical to efficiently utilize it. Cognitive radio is perceived as a crucial mechanism for improving spectral efficiency. In this paper we focus on allocating resources to secondary users (SU) which co-exist with primary user (PU) in orthogonal frequency division multiplexed based cognitive radio network. Simultaneous power and subchannel allocation for each SU is considered with the aim to maximize the total throughput or capacity of the system. We also aim to maximize the power efficiency of system and simultaneously keeping a check on total interference caused to PUs. The flexible rate demand for each SU is considered and hence categorized as real time and non real time secondary users. The problem is solved using non-dominant sorting genetic algorithm version II. The results procured are compared with existing solution and optimal solution.

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Authors and Affiliations

  1. BITS-Pilani Goa Campus, Zuarinagar, Goa, India

    Nitin Sharma & Divyakumar Badheka

  2. Department of Electrical and Computer Engineering, Ryerson University, Toronto, Canada

    Alagan Anpalagan

Authors
  1. Nitin Sharma
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  2. Divyakumar Badheka
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  3. Alagan Anpalagan
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Correspondence to Alagan Anpalagan.

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Sharma, N., Badheka, D. & Anpalagan, A. Simultaneous Power and Subchannel Allocation in Interference Limited OFDM-Based Cognitive Radio Network with Quality of Service Considerations. Wireless Pers Commun 96, 1691–1710 (2017). https://doi.org/10.1007/s11277-017-4263-7

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  • DOI: https://doi.org/10.1007/s11277-017-4263-7

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