Biswas, Sinchan and Shirazinia, Amirpasha and Dey, Subhrakanti (2016) Sensing Throughput Optimization in Cognitive Fading Multiple Access Channels With Energy Harvesting Secondary Transmitters. In: 2016 24th European Signal Processing Conference (EUSIPCO). IEEE, pp. 577-581. ISBN 978-1-5090-1891-8

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Abstract

The paper investigates the problem of maximizing the expected achievable sum rate in a fading multiple access cognitive radio network when secondary user (SU) transmitters have energy harvesting capability, and perform cooperative spectrum sensing. We formulate the problem as maximization of throughput of the cognitive multiple access network over a finite time horizon subject to a time averaged interference constraint at the primary user (PU) and almost sure energy causality constraints at the SUs. The problem is a mixed integer nonlinear program with respect to two decision variables, namely, spectrum access decision and spectrum sensing decision, and the continuous variables sensing time and transmission power. In general, this problem is known to be NP hard. For optimization over these two decision variables, we use an exhaustive search policy when the length of the time horizon is small, and a heuristic policy for longer horizons. For given values of the decision variables, the problem simplifies into a joint optimization on SU transmission power and sensing time, which is non-convex in nature. We present an analytic solution for the resulting optimization problem using an alternating convex optimization problem for non-causal channel state information and harvested energy information patterns at the SU base station (SBS) or fusion center (FC) and infinite battery capacity at the SU transmitters. We formulate the problem with causal information and finite battery capacity as a stochastic control problem and solve it using the technique of dynamic programming. Numerical results are presented to illustrate the performance of the various algorithms.

Item Type:	Book Section
Additional Information:	Cite as: S. Biswas, A. Shirazinia and S. Dey, "Sensing throughput optimization in cognitive fading multiple access channels with energy harvesting secondary transmitters," 2016 24th European Signal Processing Conference (EUSIPCO), 2016, pp. 577-581, doi: 10.1109/EUSIPCO.2016.7760314.
Keywords:	Sensing; throughput; optimization; cognitive fading; multiple access channels; energy harvesting; secondary transmitters;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering Faculty of Science and Engineering > Research Institutes > Hamilton Institute
Item ID:	14540
Identification Number:	https://doi.org/10.1109/EUSIPCO.2016.7760314
Depositing User:	Subhrakanti Dey
Date Deposited:	15 Jun 2021 14:45
Publisher:	IEEE
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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