Relay Selection and Resource Allocation in One-Way and Two-Way Cognitive Relay Networks

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

In this work, the problem of relay selection and resource power allocation in one- way and two-way cognitive relay networks using half duplex channels with different relaying protocols is investigated. Optimization problems for both single and multiple relay selection that maximize the sum rate of the secondary network without degrading the quality of service of the primary network by respecting a tolerated interference threshold were formulated. Single relay selection and optimal power allocation for two-way relaying cognitive radio networks using decode-and-forward and amplify-and-forward protocols were studied. Dual decomposition and subgradient methods were used to find the optimal power allocation. The transmission process to exchange two different messages between two transceivers for two-way relaying technique takes place in two time slots. In the first slot, the transceivers transmit their signals simultaneously to the relay. Then, during the second slot the relay broadcasts its signal to the terminals. Moreover, improvement of both spectral and energy efficiency can be achieved compared with the one-way relaying technique. As an extension, a multiple relay selection for both one-way and two-way relaying under cognitive radio scenario using amplify-and-forward were discussed. A strong optimization tool based on genetic and iterative algorithms was employed to solve the
formulated optimization problems for both single and multiple relay selection, wherediscrete relay power levels were considered. Simulation results show that the practical and low-complexity heuristic approaches achieve almost the same performance of the optimal relay selection schemes either with discrete or continuous power distributions while providing a considerable saving in terms of computational complexity.

روابط وملفات

التعريف والنوع

رقم الوثيقة

0323385f-c469-48e3-82bb-cbadb206c163

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1700551_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"احمد مصطفى الشروع","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"محمد سليم علويني","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

English

المصدر والدورية

اسم المصدر

Relay Selection and Resource Allocation in One-Way and Two-Way Cognitive Relay Networks

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

Cognitive Radio , genetic algorithm , Iterative algorithm , one-way relaying , Relay Selection, two-way relaying

إشراف وإعداد

الإشراف

محمد سليم علويني

الإعداد

احمد مصطفى الشروع

الاقتباسات الببليوغرافية