Cooperative Cognitive Radio Systems over Nakagami-m Fading Channels

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

This thesis aims to investigate the incorporation of cooperative techniques in cognitive radio networks over Nakagami-m fading channels. These last years, spectrum sharing mechanisms has gained a lot of interest in the wireless communication domain. Using cooperation in a cognitive set up make the use of spectrum much more efficient. Moreover, it helps to extend the coverage area of the cognitive network and also to reduce the transmitting power and, thus, the generated interference. In this work, we consider two particular scenarios for cooperative cognitive radio systems. The first scenario consider multihop regenerative relaying in an underlay cognitive set up. The cooperation is performed in the secondary system, in the presence of multiple primary users. Both interference power and peak power constraints are taking into account. Closed-form expressions for the statistical characteristics and multiple end- to-end performance metrics are derived. Different scenarios are presented to illustrate the obtained results and Monte Carlo simulations confirm the accuracy of our analytical derivations. In the second part of this work, we consider an overlay cognitive network with the spectrally efficient two-phase two-way relaying protocol. Two relay selection techniques, optimizing both the primary and the secondary communication, are presented. The overall outage performance is investigated and an optimal power allocation scheme, that ameliorate the outage performance of the system, is proposed. Numerical simulations are presented to illustrate and compare the obtained results.

روابط وملفات

التعريف والنوع

رقم الوثيقة

ee109404-e038-4101-aca4-d8bf3f970f28

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1700549_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":" Mohamed-Slim Alouini","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Amal Hyadi","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

Cooperative Cognitive Radio Systems over Nakagami-m Fading Channels

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

Cognitive , Cooperation, Fading , Nakagami-m

إشراف وإعداد

الإشراف

Mohamed-Slim Alouini

الإعداد

Amal Hyadi

الاقتباسات الببليوغرافية