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Energy-Efficient Power Allocation with Guaranteed QoS Under Imperfect Sensing for OFDM-Based Heterogeneous Cognitive Radio Networks

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Abstract

This paper investigates the energy efficient resource allocation scheme for orthogonal frequency division multiplexing based heterogeneous cognitive radio network (HCRN) under imperfect spectrum sensing scenario with guaranteed quality of service (QoS). The objective of this paper is to maximize the energy efficiency (EE) of the HCRN subject to total transmission power, interference and QoS Constraints. To solve the mixed integer nonlinear programming problem efficiently, the primal problem has been transformed into a linear programming problem by separating the resource allocation scheme into two steps, i.e., subcarrier assignment and power allocation. Consequently an energy efficient power allocation (EEPA) algorithm has been anticipated based on fractional programming and sub-gradient method. Numerical results confirm that the proposed EEPA algorithm can achieve higher EE than conventional equal power allocation method.

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Authors and Affiliations

  1. Thiagarajar College of Engineering, Madurai, 625015, India

    Cynthia Anbuselvi Thangaraj & T. Aruna

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  1. Cynthia Anbuselvi Thangaraj
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  2. T. Aruna
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Correspondence to Cynthia Anbuselvi Thangaraj.

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Thangaraj, C.A., Aruna, T. Energy-Efficient Power Allocation with Guaranteed QoS Under Imperfect Sensing for OFDM-Based Heterogeneous Cognitive Radio Networks. Wireless Pers Commun 109, 1845–1862 (2019). https://doi.org/10.1007/s11277-019-06655-w

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