Sökning: "cognitive relay networks"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden cognitive relay networks.

1. 1. Outage Probability Analysis of CooperativeCognitive Radio Networks Over κ − μ Shadowed Fading Channels

   Master-uppsats, Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

   Författare :Mahathi Poreddy; [2016]
   Nyckelord :Cognitive Radio Networks; Cooperative Communications; Decode-and-Forward Relays; Multiple-relay; Outage Probability;

   Sammanfattning : Over time, wireless technology advancements in the field of communications have been attracting every individual to turn into a wireless user. To accommodate the increasing number of users and to avoid the problem of spectrum scarcity, the concept of Cognitive Radio Network (CRN) has been developed. LÄS MER

3. 2. Performance Analysis of a MIMO Cognitive Cooperative Radio Network with Multiple AF Relays

   Master-uppsats, Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

   Författare :Advaita Advaita; Mani Meghala Gali; [2016]
   Nyckelord :Cognitive radio; Cooperative communications; Space time coding; MIMO systems; Outage probability;

   Sammanfattning : With the rapid growth of wireless communications, the demand for the various multimedia services is increasing day by day leading to a deficit in the frequency spectrum resources. To overcome this problem, the concept of cognitive radio technology has been proposed which allows the unlicensed secondary user (SU) to access the licensed spectrum of the primary user (PU), thus improving the spectrum utilization. LÄS MER

4. 3. Exploiting the Direct Communication Link for Enhancing Effective Capacity Performance of Cognitive Radio Relay Networks

   Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Författare :Md Abdul Matin Biswas; [2014]
   Nyckelord :Cognitive Radio; Quality of Service QoS ; Effective Capacity; Cooperative Relaying; Cognitive Relay Networks; Peak Interference Power Constraint; Delay QoS Constraint;

   Sammanfattning : Nowadays, cognitive radio (CR) is a promising concept to improve the radio spectrum exploitation. CR has tremendous ability to enhance spectrum efficiency by allowing secondary users (SUs) to access licensed radio spectrum resource which is currently not being used by primary users (PUs). LÄS MER

5. 4. The Performance of Dual-Hop Decode-and-Forward Underlay Cognitive Relay Networks with Interference Power Constraints over Weibull Fading Channels

   Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Författare :Andawattage Chaminda Janaka Samarasekera; [2014]
   Nyckelord :Cognitive Radio; Weibull Fading Channels; Cooperative Communication; Cognitive Relay Networks;

   Sammanfattning : With the rapid development and the increasing use of wireless devices, spectrum scarcity has become a problem. The higher frequencies have bad propagation characteristics and the lower frequencies have low data rates, therefore the radio spectrum that is available for efficient wireless transmission is a limited resource. LÄS MER

7. 5. Effect of Primary Network on Performance of Spectrum Sharing System over Nakagami-m Fading Channel

   Master-uppsats, Blekinge Tekniska Högskola/Institutionen för kommunikationssystem

   Författare :Fahim Khan; Pierre Celestin Mazarati; Nasir Khan; [2013]
   Nyckelord :Cognitive Radio Network CRN ; Amplify and Forward AF ; Nakagami-m fading channel; Cooperative Spectrum Sharing.;

   Sammanfattning : During the last few years, we have witnessed that radio spectrum is becoming a valuable and scarce resource due to the increasing demand of multimedia services. However, recent research has shown that most of the available radio spectrum is not used effectively and is wasted. LÄS MER