Browse

The Virtual University, Pakistan’s first University based completely on modern Information and Communication Technologies, was established by the Government as a public sector, not-for-profit institution with a clear mission: to provide extremely affordable world class education to aspiring students all over the country.

Using free-to-air satellite television broadcasts and the Internet, the Virtual University allows students to follow its rigorous programs regardless of their physical locations. It thus aims at alleviating the lack of capacity in the existing universities while simultaneously tackling the acute shortage of qualified professors in the country. By identifying the top Professors of the country, regardless of their institutional affiliations, and requesting them to develop and deliver hand-crafted courses, the Virtual University aims at providing the very best courses to not only its own students but also to students of all other universities in the country.

Performance Analysis of Spectrum Sensing Methodologies for Cognitive Radios

Download

Author: AYESHA SAADIA


Citable URI : https://vspace.vu.edu.pk/detail.aspx?id=41

Publisher : Virtual University of Pakistan

Date Issued: 6/29/2012 12:00:00 AM


Abstract

The Radio Spectrum is used to transmit electromagnetic waves of different frequencies. With the passage of time people are getting aware of new technologies and as a result demand for different services has been increased. This results in the shortage of available spectrum. Spectrum utilization has now become a challenging task due to increase in wireless communications. Major licensed bands, such as those allocated for television broadcasting is not been fully utilized which results in spectrum wastage. This led to the idea of cognitive radio, first presented officially by Mitola and Maguire in 1999. Cognitive radio is a software-defined radio system, or SDR, a radio whose functionality is completely defined in software. Changes in SDR can be made by just changing the software. Mitola and Maguire proposed that the unused spectrum can be utilized by Secondary users (Unlicensed users) without creating harmful interference to Primary users (Licensed users). Secondary user can use the spectrum when primary user is inactive and should vacate the channel as soon as the primary user becomes active. An Efficient Signal Detection algorithm can perform this task. Detection of primary user signal is an elementary problem in cognitive radio. Energy detection, Match-filtering and Cyclostationary methods are widely used for spectrum sensing. This thesis will explore spectrum sensing methods and will analyze the performance of different techniques including methods based on the eigenvalue of the covariance matrix of received signals used as the test statistic. Different methods working with and without noise power will be simulated to demonstrate the performance of spectrum sensing techniques.


URI : https://vspace.vu.edu.pk/details.aspx?id=41

Citation: Saadia, A. (2012). Performance Analysis of Spectrum Sensing Methodologies for Cognitive Radios. Virtual University of Pakistan, (Lahore, Pakistan).

Version : Final Version

Terms of Use : All the material and results are copyright of Virtual University of Pakistan

Detailed Terms :

Journal :

Files in this item

Name Size Format
Spring 2012_CS720_ms080400017.pdf 857kb pdf


Copyright 2016 © Virtual University of Pakistan