Ahmed Gamal Helmy Mohamed Mohamed Salem <br/><br/>
Adaptive rate transmission and power allocation for spectrum sharing systems in cognitive radio networks /  
 تكييف معدل نقل البيانات وتوزيع الطاقة لنظم تقاسم الطيف فى شبكات الرادية ذاتية الادراك 
Ahmed Gamal Helmy Mohamed Mohamed Salem p Supervised Ahmed F. Shalash , Mohamed M. Abdallah 
 - Cairo :   Ahmed Gamal Helmy Mohamed Mohamed Salem ,   2011 
 - 66P. :   charts ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Electronics and Communication 
<br/><br/> Adaptive modulation can be utilized as a power - efficient technique to maximize the capacity of the secondary link while satisfying QoS constraints at the primary receiver such as average interence , peak interference , primary outage , transmitted power and combined average / peak interference constraints by allowing the secondary user to adapt its power and rate according to the channel state information ( CSI ) of the secondary channel between the secondary transmitter and the secondary receiver and the interference channel between the secondary transmitter and the primary receiver 
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<br/><br/><label>Subjects--Index Terms: </label>Power allocation  Rate adaptation  Spectrum sharing systems