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Performance enhancement of relaying techniques for underlay cognitive radio networks / Ahmed Mohamed Hassan Elshaarany ; Supervised Mohamed M. Khairy , Mohamed M. Abdallah

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Ahmed Mohamed Hassan Elshaarany , 2014Description: 71 P. : charts , facsimiles ; 30cmOther title:
  • تحسين اداء تقنيات الترحيل لشبكات راديو الطبقة التحتية المعرفى [Added title page title]
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  • Issued also as CD
Dissertation note: Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Electronics and Communications Summary: In this thesis, we propose and investigate di{uFB00}erent relay selection algorithms in underlay cognitive radio networks. Firstly, we consider a multiple relay selection scheme. This scheme is an attempt to reduce the outage probability of the secondary cognitive network. For each channel realization, we allow for multiple relay selection in case the best relay, which provides the highest signal to noise ratio among those that satisfy the interference constraint, does not satisfy the desired signal to noise ratio. A cumulative density function for the signal to noise ratio for two relays is deduced. Secondly, we analyze the bit error rate performance of a secondary cognitive network with a source and multiple decode and forward relays using di{uFB00}erent modulation levels sharing the spectrum with a nearby primary user. We obtain a closed form expression for the bit error rate for two scenarios
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Item type Current library Home library Call number Copy number Status Date due Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.13.08.M.Sc.2014.Ah.P (Browse shelf(Opens below)) Not for loan 01010110065026000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.13.08.M.Sc.2014.Ah.P (Browse shelf(Opens below)) 65026.CD Not for loan 01020110065026000

Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Electronics and Communications

In this thesis, we propose and investigate di{uFB00}erent relay selection algorithms in underlay cognitive radio networks. Firstly, we consider a multiple relay selection scheme. This scheme is an attempt to reduce the outage probability of the secondary cognitive network. For each channel realization, we allow for multiple relay selection in case the best relay, which provides the highest signal to noise ratio among those that satisfy the interference constraint, does not satisfy the desired signal to noise ratio. A cumulative density function for the signal to noise ratio for two relays is deduced. Secondly, we analyze the bit error rate performance of a secondary cognitive network with a source and multiple decode and forward relays using di{uFB00}erent modulation levels sharing the spectrum with a nearby primary user. We obtain a closed form expression for the bit error rate for two scenarios

Issued also as CD

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