Type of Document Master's Thesis Author Patcha, Venkat vinod Author's Email Address email@example.com URN etd-06082011-154750 Title Experimental Study of Cognitive Radio Test-bed Using USRP Degree Master of Science in Electrical Engineering (M.S.E.E.) Department Electrical & Computer Engineering Advisory Committee
Advisor Name Title Wei, Shuangqing Committee Chair Kannan, Rajgopal Committee Member Liang, Xue-Bin Committee Member Keywords
- Software-defined Radios
- Cogntive Radio
Date of Defense 2011-05-10 Availability unrestricted AbstractCognitive Radio is an emerging technology that enables efficient utilization of the spectrum. As
such, it has created great interests in industrial and research fields. Many people have proposed
test-bed models for the performance analysis of primary and secondary users in a real-time noise
environment. However, these test-beds are generally lacking in their range of capabilities as well as accurate implementation of the proposed models. In this thesis, we develop our test-bed on
USRP to achieve the spectrum sensing and co-existence of primary and secondary users, while
implementing the rendezvous protocols for secondary traffic coordination.
We first demonstrate the spectrum sensing on the primary users using an energy detector(Average periodogram analysis) to obtain the average power of the primary channel under two different channel conditions (busy or idle). The focus is extended on developing the Markov traffic model and the Coded OFDM transceivers, while discussing the practical limitations for Markov traffic and viable solutions for reducing the burst errors for Coded OFDM. Finally, a four-node test-bed model of primary and secondary users is analyzed with the
interference metrics (packet loss and error rate) for different scenarios. Also, the throughput and
the interference metrics are compared for different rendezvous protocols of the secondary users.
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