Next Article in Journal
Modified Convolutional Neural Network Based on Dropout and the Stochastic Gradient Descent Optimizer
Previous Article in Journal
A Novel Evolutionary Algorithm for Designing Robust Analog Filters
Article Menu

Export Article

Open AccessArticle
Algorithms 2018, 11(3), 27; https://doi.org/10.3390/a11030027

Spectrum Allocation Based on an Improved Gravitational Search Algorithm†,

School of Software, Central South University, Changsha 410075, China
*
Author to whom correspondence should be addressed.
Received: 8 November 2017 / Revised: 1 March 2018 / Accepted: 2 March 2018 / Published: 5 March 2018
View Full-Text   |   Download PDF [6302 KB, uploaded 5 March 2018]   |  

Abstract

In cognitive radio networks (CRNs), improving system utility and ensuring system fairness are two important issues. In this paper, we propose a spectrum allocation model to construct CRNs based on graph coloring theory, which contains three classes of matrices: available matrix, utility matrix, and interference matrix. Based on the model, we formulate a system objective function by jointly considering two features: system utility and system fairness. Based on the proposed model and the objective problem, we develop an improved gravitational search algorithm (IGSA) from two aspects: first, we introduce the pattern search algorithm (PSA) to improve the global optimization ability of the original gravitational search algorithm (GSA); second, we design the Chebyshev chaotic sequences to enhance the convergence speed and precision of the algorithm. Simulation results demonstrate that the proposed algorithm achieves better performance than traditional methods in spectrum allocation. View Full-Text
Keywords: GSA; spectrum allocation; CRNs; PSA; Chebyshev chaotic sequences GSA; spectrum allocation; CRNs; PSA; Chebyshev chaotic sequences
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Liu, L.; Wang, N.; Chen, Z.; Guo, L. Spectrum Allocation Based on an Improved Gravitational Search Algorithm. Algorithms 2018, 11, 27.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Algorithms EISSN 1999-4893 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top