02619nas a2200265 a 450000500170000000800410001703500150005810000350007324501090010826000670021730000220028449000270030650001670033350200580050052014000055865000290195865000170198765000350200470000370203970000500207670000500212671000520217681000590222885600660228720260817162322.0110219s2010    th uu|m rtt   0|  a1eng d  a.b120903841 aJayasinghe, Laddu Keeth Saliya10aAnalysis of cooperative relay communication with cognitive radio, physical layer network coding and MIMO  aPathum Thani, Thailand :bAsian Institute of Technology,c2010  a68 leaves :bill.1 aThesis ;vno. TC-10-04  aA thesis submitted in partial fulfillment of the requirements for the  degree of Master of Engineering in Telecommunications, School of Engineering and Technology  aThesis (M.Eng.) - Asian Institute of Technology, 2010  aHere, we analyze the relay networks with cognitive radio (CR), physical layer networkcoding (PNC) and multiple-input multiple-output (MIMO) communications.First, we investigate the optimal power allocation of relaynodes which are usedin the secondary user (SU) communication of a CR network. Thepower allocationproblem solves for regenerative, non-regenerative, N series and diversity relay modelsunder Rayleigh fading. The outage probability of SU communication is limited by theinterference power threshold (IPT) constraints of PUs and is affected significantly bythe IPT levels of PUs.An optimal power allocation problem is developed with IPT constraints to max-imize the sum-rate of the two-way communication. Similar behavior is observed as inthe one way transmission.Finally, we investigate OSTBC MIMO transmission with non-coherent amplify-and-forward relaying when the source-relay and relay-destination channels undergoRayleigh and Rician fading respectively. We derive expressions for the moment gener-ating function (MGF), moments, PDF of the SNR at the destination. We analyze thesystem performance by deriving new analytical expressionsfor the BER and amount offading. These performance metrics reveal that strong line of sight component betweenrelay-destination link always limit the performance promised by MIMO scattering en-vironment only when both nodes have multiple antennas. 0aCognitive radio networks 0aMIMO systems 0aWireless communication systems1 aRajatheva, R.M.A.P,eChairperson1 aAhmed, Kazi Mohiuddin,eExamination Committee0 aPoompat Saengudomlert,eExamination Committee2 aThe Government of Finland, eScholarship donor 2 aAsian Institute of Technology.tThesis ;vno. TC-10-04  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B04074