Due to the rapid increase in the use of wireless technologies, we require the appropriate usage of radio spectrum. For the appropriate usage of radio spectrum, one of the technique called cognitive radio come into existence. As we know number of users are increasing progressively but our available spectrum are becoming abundant. Research says that almost of the authorized spectrum persists spare for lots of the time and thus decreasing the efficiency. By using the cognitive radio we can provide this unoccupied spectrum to the unlicensed user without causing any interference to the other network. To accomplish this we need to perform the spectrum sensing and for this many spectrum sensing techniques has been proposed by the researchers. This paper will give the brief introduction about the various spectrum sensing techniques. At last the result is provided in this paper by comparing the functioning of energy detection technique on Rayleigh and AWGN channels by using Receiver Operating Characteristics Curve in MATLAB software by varying SNR and number of samples “n” values.

Cognitive radio, matched filter, energy detection, spectrum sensing

[1] Lu et al., “Ten years of research in spectrum sensing and sharing in cognitive radio,” EURASIP Journal on Wireless Communications and Networking, 2012.
[2] H. Celebi, Ismail Guvenc, S. Gezici and H. Arslan, “Cognitive-Radio Systems for Spectrum, Location and Environmental Awareness”, IEEE Antennas and Propagation Magazine, vol. 52, pp. 41-61, 2010.
[3] Y-C Liang, K-C Chen, G. Ye Li and P. Mahonen, “Cognitive Radio Networking and Communications: An Overview”, IEEE Transactions on Vehicular Technology, vol. 60, no. 7, pp.3386-3407, 2011.
[4] Nazar Radhi, “Implementation of Spectrum Sensing Techniques for Cognitive Radio Systems,” Brunel University, London, July 2011.
[5] Sajjad Ahmad Ghauri, I M Qureshi, M. Farhan Sohail, SherazAlam, M. Anas Ashraf, “Spectrum Sensing for Cognitive Radio Networks over Fading Channels”, IJCER Vol. 2, Issue. 1, 2013
[6] Mr. Pradeep Kumar Verma, Mr. Sachin Taluja, Prof. Rajeshwar Lal Dua, “Performance analysis of Energy detection, Matched filter detection & Cyclostationary feature detection Spectrum Sensing Techniques” IJCER, Vol.2 Issue. 5, 2012
[7] J Ma, GD Zhao, YG Li, “Soft combination and detection for cooperative spectrum sensing in cognitive radio networks”, IEEE Transactions on Wireless Communications, Vol. 7, Issue. 11, pp. 4502–4506 (2008).
[8] Tulika Mehta, Naresh Kumar, Surender S Saini, “Comparison of Spectrum Sensing Techniques in Cognitive Radio Networks”, IJECT Vol. 4, Issue Spl - 3, 2013
[9] Garima Nautiyal, Rajesh Kumar, “Spectrum Sensing In Cognitive Radio Using Matlab”, International Journal of Engineering and Advanced Technology (IJEAT), Vol.2, Issue.5, 2013.
[10] Md. Shamim Hossain, Md. Ibrahim Abdullah, and Mohammad Alamgir Hossain, “Energy Detection Performance of Spectrum Sensing in Cognitive Radio”, I.J. Information Technology and Computer Science, Vol. 4, Issue. 11, pp. 11-17, 2012.
[11] Omkar S. Vaidya, Vijaya M. Kulkarni, “Analysis of Energy Detection based Spectrum Sensing over Wireless Fading Channels in Cognitive Radio Network” , International Journal of Emerging Technology and Advanced Engineering, Vol. 2, Issue. 3, 2013.
[12] Dong-Chan Oh and Yong-Hwan Lee, “Energy Detection Based Spectrum Sensing for Sensing Error Minimization in Cognitive Radio Networks,” International Journal of Communication Networks and Information Security (IJCNIS) Vol. 1, Issue. 1, 2009.
[13] Sajjad Ahmad Ghauri, et al.,” Spectrum Sensing For Cognitive Radio Networks Over Fading Channels” International Journal of Computer and Electronics Research, Vol. 2, Issue. 1, 2013.
[14] F.F.Digham, M.S.Alouini and M.K.Simon,” On the Energy Detection of unknown Signals over Fading Channels” IEEE Transactions on Communications, Vol. 55, Issue. 1, pp.21-24, 2007.
[15] A. Papoulis and S.U.Pillai,” Probability, Random Variables and Stochastic Processes”, New York: McGraw-Hill, ed. 4th,2002.
[16] J.G.Proakis, Digital Communication, New York:McGraw-Hill, ed. 4th,2001.
[17] Z.Han, R.Fan and H.Jang, ”Replacement of Spectrum Sensing in Cognitive radio”, IEEE Transactions on Wireless Communications, Vol. 8, Issue.6, pp.2819-2826, 2009.