Multi-user interference and cross correlation effects of spline multiwavelet based cognitive radio network
Premkumar, Annamalai Benjamin
Lau, Chiew Tong
Date of Issue2012
School of Computer Engineering
A multi-user Cognitive Radio (CR) network resolves the problem of spectrum under utilization and enables the deployment of new wireless applications in the fast growing wireless communication area. The unique feature of CR is its ability to use the vacant band while insuring minimum interference to adjacent users. So modulation and multiple access schemes insuring minimum interference are required for CR transmission. Multiwavelets are rarely considered in the field of wireless communication. They are orthogonal and symmetric waveforms with short support and can insure lower multiple access interference in a multi-user environment. Hence a multi-user CR network using B-spline multiwavelets of different orders is considered in this paper for evaluating the performance characteristics. The cross correlation and multi-user interference are derived and its effect on error performance of linear, quadratic and cubic wavelets are analyzed. Simulation results prove that the number of users within a network can be increased by using spline wavelets of different orders without compromising on error performance.
DRNTU::Engineering::Computer science and engineering
Journal of communications
© 2012 Academy Publisher. This paper was published in Journal of Communications and is made available as an electronic reprint (preprint) with permission of Academy Publisher. The paper can be found at the following official DOI: [http://dx.doi.org/10.4304/jcm.7.9.701-711]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.