Cyclic Prefix Based Cooperative Sequential Spectrum Sensing Algorithms for OFDM

Jayaprakasam, A and Sharma, V and Murthy, CR and Narayanan, P (2010) Cyclic Prefix Based Cooperative Sequential Spectrum Sensing Algorithms for OFDM. In: Communications (ICC), 2010 IEEE International Conference on , 23-27 May 2010 , Cape Town.

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Abstract

This paper considers the problem of spectrum sensing in cognitive radio networks when the primary user is using Orthogonal Frequency Division Multiplexing (OFDM). For this we develop cooperative sequential detection algorithms that use the autocorrelation property of cyclic prefix (CP) used in OFDM systems. We study the effect of timing and frequency offset, IQ-imbalance and uncertainty in noise and transmit power. We also modify the detector to mitigate the effects of these impairments. The performance of the proposed algorithms is studied via simulations. We show that sequential detection can significantly improve the performance over a fixed sample size detector.

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	Copyright 2010 IEEE. Personal use of this material is permitted.However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	20 Dec 2011 06:44
Last Modified:	20 Dec 2011 06:44
URI:	http://eprints.iisc.ac.in/id/eprint/38974

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