Cooperative Spectrum Sensing Algorithms For OFDM Systems with Frequency Selective Channels

Jayaprakasam, ArunKumar and Sharma, Vinod and Murthy, Chandra R and Narayanan, Prashant (2010) Cooperative Spectrum Sensing Algorithms For OFDM Systems with Frequency Selective Channels. In: International Conference on Signal Processing and Communications, JUL 18-21, 2010.

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Abstract

This paper considers the problem of spectrum sensing in cognitive radio networks when the primary user employs Orthogonal Frequency Division Multiplexing (OFDM). We specifically consider the scenario when the channel between the primary and a secondary user is frequency selective. We develop cooperative sequential detection algorithms based on energy detectors. We modify the detectors to mitigate the effects of some common model uncertainties such as timing and frequency offset, IQ-imbalance and uncertainty in noise and transmit power. The performance of the proposed algorithms are studied via simulations. We show that the performance of the energy detector is not affected by the frequency selective channel. We also provide a theoretical analysis for some of our algorithms.

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:	01 Apr 2011 08:02
Last Modified:	01 Apr 2011 08:02
URI:	http://eprints.iisc.ac.in/id/eprint/36369

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