Nirav A. Patel

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ALL RIGHTS RESERVED ii ACKNOWLEDGEMENTS I would like to express my deep and sincere gratitude to my advisor, Professor Huiping Guo, for her invaluable guidance and encouragement, without which this thesis would not have been completed. Her advice and knowledge have been invaluable. I would also like to thank Professor Raj suggestions and support. I would(More)
The instant messaging system is an application based system used for communication using the internet service, in real time. Its use and popularity is increasing day by day. Many services and applications have been developed for real time communication so far, among them XMPP and SIP are the widely used. The key functionalities of instant messaging system(More)
In this paper, we shall consider the problem of secondary users' selection for cooperative spectrum sensing in cognitive radio networks. To this end we use the probability of detection as a criterion subject to a false alarm constraint for a linear combination based fusion technique at the fusion center. Owing to the high computational complexity involved(More)
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