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Reseach Article

Legacy User Detection in OFDM Based Cognitive Radio

Published on April 2012 by P. Lingeswari, K. J. Prasanna Venkatesan, V. Vijayarangan
International Conference in Recent trends in Computational Methods, Communication and Controls
Foundation of Computer Science USA
ICON3C - Number 7
April 2012
Authors: P. Lingeswari, K. J. Prasanna Venkatesan, V. Vijayarangan
d276fb19-e466-4f34-9fc0-527e8e303e80

P. Lingeswari, K. J. Prasanna Venkatesan, V. Vijayarangan . Legacy User Detection in OFDM Based Cognitive Radio. International Conference in Recent trends in Computational Methods, Communication and Controls. ICON3C, 7 (April 2012), 23-27.

@article{
author = { P. Lingeswari, K. J. Prasanna Venkatesan, V. Vijayarangan },
title = { Legacy User Detection in OFDM Based Cognitive Radio },
journal = { International Conference in Recent trends in Computational Methods, Communication and Controls },
issue_date = { April 2012 },
volume = { ICON3C },
number = { 7 },
month = { April },
year = { 2012 },
issn = 0975-8887,
pages = { 23-27 },
numpages = 5,
url = { /proceedings/icon3c/number7/6052-1053/ },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Proceeding Article
%1 International Conference in Recent trends in Computational Methods, Communication and Controls
%A P. Lingeswari
%A K. J. Prasanna Venkatesan
%A V. Vijayarangan
%T Legacy User Detection in OFDM Based Cognitive Radio
%J International Conference in Recent trends in Computational Methods, Communication and Controls
%@ 0975-8887
%V ICON3C
%N 7
%P 23-27
%D 2012
%I International Journal of Computer Applications
Abstract

Radio transmission involves the use of part of the electromagnetic spectrum. Use of spectrum is regulated by Federal Communications Commission (FCC). Cognitive Radio (CR) provides solution to spectrum scarcity problem. The biggest challenge related to spectrum sensing is in developing sensing technique which are able to detect Primary User (PU) signals while being sufficiently fast and low cost implementation. In order to detect the presence of primary user signal with high probability, spectrum sensing is a fundamental requirement to achieve the goal of Cognitive Radio. Energy detection is one of the techniques to detect the primary users in CR. In this paper, energy detection technique is used to sense the spectrum so as to improve the detection performance of CR. The performance of energy detection may degrade at very low signal-to-noise (SNR). To overcome this, square law combining (SLC) scheme is proposed to enhance the detection probability. In particularly, the Orthogonal Frequency Division Multiplexing (OFDM) based CR receiver detect the primary user signal, where CR receiver is equipped with energy detector and SLC. Here, energy detection in OFDM based spectrum sensing in CR for single user is examined and simulation results are obtained. Significant improvement is observed in CR for primary user detection with OFDM based energy detector.

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Index Terms

Computer Science
Information Sciences

Keywords

Cognitive Radio Energy Detection Ofdm Spectrum Hole Spectrum Sensing