Title page for ETD etd-06082011-154750

Type of Document Master's Thesis
Author Patcha, Venkat vinod
Author's Email Address venkatvinod@gmail.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
  • Software-defined Radios
  • Cogntive Radio
Date of Defense 2011-05-10
Availability unrestricted
Cognitive 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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