Throughput Optimization in OFDMA Cognitive Radio Networks Based on Node Selection and Power Allocation
محل انتشار: مجله سیستم های برق و سیگنال، دوره: 2، شماره: 2
سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 393
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شناسه ملی سند علمی:
JR_JESS-2-2_004
تاریخ نمایه سازی: 19 شهریور 1396
چکیده مقاله:
Node selection and resource management are two key issues in cognitive radio networks. Due to channel impairments in wireless networks, cooperative spectrum sensing is used in orthogonal frequency division multiple access (OFDMA) cognitive radio networks. The problem is designed to maximize the system throughput under the constraints of power budget and detection performance. This problem is solved using convex optimization methods and the priority of nodes for participating in sensing and transmission processes and also the optimal power of transmission nodes are obtained. For implementing this solution, three algorithms are proposed. The results reveal the benefits of the proposed algorithms in terms of throughput and sensing performance.
کلیدواژه ها:
نویسندگان
Paria Shaghaghivand
Department of Electrical and Computer Engineering, Noshirvani University of Technology, Babol, Iran.
Ataollah Ebrahimzadeh
Department of Electrical and Computer Engineering, Noshirvani University of Technology, Babol, Iran.
Maryam Najimi
University of Science and Technology of Mazandaran (USTM) Behshahr, Iran,
Bijan Abbasi Arand
Tarbit Modares University, Tehran, Iran.