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Analysis of capacity limits over fading environment with imperfect channel state information for cognitive radio network

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Abstract

In this paper, we have explored an optimal power allocation scheme for the spectrum sharing with imperfect channel state information between the cognitive/secondary user (CU) and licensed/primary user (PU) in the Rayleigh fading environment. We have analyzed the ergodic capacity of CU link under the combination of peak transmit power and peak/average interference power constraints with or without the primary user interference. In addition to this, the outage capacity with multiple primary users’ interference is also analyzed with the error variance under the joint peak transmit power and peak interference power constraint as well as individual peak interference power constraint. Moreover, the power disbursement is also investigated to achieve the lower limit of ergodic and outage capacity. The minimum mean square channel estimation technique is used for the channel estimation between CU and PU. Further, the convex optimization method is used for the optimal power allocation.

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Acknowledgments

The authors are very much thankful to the potential reviewers for their critical comments and suggestions to improve the quality of the manuscript. The authors are also sincerely thankful to the Indian Space Research Organization vide Project No. ISRO/RES/4/619/14-15.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Jaypee University of Information Technology, Waknaghat, Solan, -173234, India

    Bindu Bharti & G Singh

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  1. Bindu Bharti
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  2. G Singh
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Correspondence to G Singh.

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Bharti, B., Singh, G. Analysis of capacity limits over fading environment with imperfect channel state information for cognitive radio network. Ann. Telecommun. 72, 469–482 (2017). https://doi.org/10.1007/s12243-016-0556-1

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  • DOI: https://doi.org/10.1007/s12243-016-0556-1

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