Essays about: "Cognitive Radio Networks"

Showing result 21 - 25 of 32 essays containing the words Cognitive Radio Networks.

1. 21. Performance Analysis of Cognitive Radio Network over SIMO System

   University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Author : Iqbal Hasan Haider; MD. Fazla Rabby; [2012]
   Keywords : Cognitive Radio; Outage Probability; Symbol Error Probability; Single Input Multiple Output; Selection Combining; Spectrum Sharing System.;

   Abstract : As resources are limited, radio spectrum becomes congested due to the growth of wireless applications. However, measurements address the fact that most of the licensed spectrums experience low utilization even in intensively teeming areas. READ MORE

3. 22. Spectrum Sensing of Cognitive Radio Networks using Amplify and Forward Relay over Correlated Nakagami-m Fading Channel

   University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Author : Suman Dongol Maharjan; [2011]
   Keywords : Amplify-and-forward AF ; orthogonal space-time codes OSTBCs ; correlated Nakagami-m fading; detection probability; cognitive radio.;

   Abstract : In the last ten years, we have been witnessing the vast growth in wireless communications due to the popularity of many wireless devices, mobiles, smart phones etc. As a result, the demand for high data rates, bandwidth, and spectrum utilization has increased. READ MORE

4. 23. Spectrum Sensing in Cognitive Radio Systems using Energy Detection :  

   University essay from Avdelningen för elektronik, matematik och naturvetenskap

   Author : YUHANG SUN; [2011]
   Keywords : Cognitive radio; spectrum sensing; energy detector;

   Abstract : Cognitive radio is a low-cost communication system, which can choose the available frequencies and waveforms automatically on the premise of avoiding interfering the licensed users. The spectrum sensing is the key enabling technology in cognitive radio networks. READ MORE

5. 24. Spectrum Sensing and Management in Cooperative Cognitive Radio

   University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Author : Ghayoor Abbas Jafri; Ateeq Ur Rehman; Muhammad Tariq Sadiq; [2011]
   Keywords : Cognitive radio networks; Cooperative communication; Dynamic spectrum sharing; Cross layer design ; OC-MAC Protocol ; Opportunistic spectrum access; Spectrum sensing; Spectrum management;

   Abstract : In the last few years, there has been enormous improvement in mobile communication services. Due to this rapid growth in the field of communications, the demand for wireless spectrum has increased rapidly. In the early days in order to remove the interference problem, the spectrum was assigned statically. READ MORE

6. 25. Analysis of OSTBC in Cooperative Cognitive Radio Networks using 2-hop DF Relaying Protocol

   University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Author : Muhammad Mustafa Tahseen; MatiUllah Khan; Farhan Ullah; [2011]
   Keywords : Cognitive Radio; Cooperative Communication; Alamouti STBC; OSTBC; Rayleigh Fading; Energy Detector; DF Relay; Maximum Likelihood; MRC;

   Abstract : To achieve cooperative diversity in cognitive radio network, Decode and Forward (DF) protocol is implemented at Cognitive Radios (CRs) using Orthogonal Space Time Block Coding (OSTBC). The 2-hop communication between source and destination is completed with the help of Cognitive Relays (CRs) using Multiple Input Multiple Output (MIMO) technology within the network. READ MORE