13645

12408

كارشناسي ارشد

مخابرات

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

۱۳۹۷

دوازده، ۸۴ص.: مصور، جدول، نمودار

مهدي مهدوي

علي محمد دوست حسيني، فروغ السادات طباطبا

1397/04/11

كتابنامه

برق و كامپيوتر

مهندسي برق و كامپيوتر

ID12408

Sum Throughput Increasing of Secondary Users in Cognitive Wireless Powered Communication Networks Reza Jafari Reza jafari1@ec iut ac ir Date of Submission May 12 2018 Isfahan University of Technology Department of Electrical and Computer Engineering Degree M Sc Language Farsi Supervisor Mahdi Mahdavi m mahdavi@cc iut ac irAbstractThe improper operation of the wireless devices due to the sudden depletion of batteries energy and alsobatteries replacing and or recharging difficulties have always been one of the important designconsiderations Because of such reasons and due to the recent advances in wireless energy transfer WET the motivation for investigation on wireless power communication networks WPCNs hasincreased In such types of networks the energy of wireless devices can be permanently suppliedthrough a hybrid access point H AP without human intervening Furthermore due to allocation ofmost of radio spectrum the lack of available spectrum for future application such as WPCNs is anotherchallenging issue A promising solution for this problem is combination of cognitive radio and WPCNsin the new form of cognitive wireless powered communication networks CWPCNs In general dataand energy transmission in the secondary network can be performed in Half Duplex HD mode orInband Full Duplex I FD mode depends on the type of the hardware of the equipment s In HD mode all secondary users first harvest energy in a part of the frame that is called WET phase and then duringthe remaining part of the frame that is called WIT phase transmit their information to the H AP Thisstructure is called HD CWPNC HD Recently to improve spectral and temporal efficiency the interestsin researches about I FD structures in which the devices can transmit and receive energy and datasimultaneously in the same frequency band have increased This structure is called FD CWPNC FD Because of simultaneous energy transmission and data reception self interference cancellation SIC in the H AP is one of design challenges in such a structure In this thesis the model of spectrum sharingis underlay The goal is to maximize the sum throughput of secondary users in both mentionedstructures under different constraints such as interference temperature on primary receiver thetransmitted power of H AP the energy buffer capacity and also the comparison of such structures It isshown that the STM problem is a convex optimization problem that can be solved using HETA andHJOTPA algorithms In contrast with HETA in which equal length time slots are allocated to thesecondary users time slots are optimally allocated to SUs in HJOTPA Numerical implementation inMathab reveals that HJOTPA has better performance when compared with HETA In addition if SICis performed appropriately then FD CWPCN FD structure has higher sum throughput than HD CWPCN HD one keywords Cognitive Wireless Powered Communication Network CWPCN Half Duplex mode HD In band Full Duplex mode I FD Self Interference Cancellation SIC

مهدي مهدوي

علي محمد دوست حسيني، فروغ السادات طباطبا