Essays about: "Cognitive Radio Networks"

Showing result 16 - 20 of 32 essays containing the words Cognitive Radio Networks.

1. 16. Capacity Analysis of Cognitive Radio Relay Networks under Transmission and Interference Power Constraints

   University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Author : Abhijith Gopalakrishna; [2012]
   Keywords : effective capacity; outage capacity; ergodic capacity; cognitive radio; relay networks;

   Abstract : This thesis investigates the performance of cognitive radio relay networks (CRRN) in Rayleigh fading channel under various power constraints. Here spectrum sharing approach is considered, whereby a secondary user (SU) may be allowed to transmit simultaneously with a primary user (PU) as long as SU interference to PU remains below a tolerable level. READ MORE

3. 17. PERFORMANCE ANALYSIS OF HYBRID DECODE-AMPLIFY FORWARD RELAYING PROTOCOLS IN COGNITIVE NETWORKS

   University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Author : Awais Salman Qazi; Muhammad Shoaib; Muhammad Shahan Saleem; [2012]
   Keywords : MIMOs; PU; SU; CRs; CC; Maximum Likelihood estimation ;

   Abstract : Nowadays, the world has observed a tremendous increase in the demand of radio spectrum in wireless communication. Services like broadband internet, telecommunication, videoconferencing, mobile IP, online multimedia gaming and other applications have been deployed using wireless services. READ MORE

4. 18. Impact of Interference from Primary User on the Performance of Cognitive Radio Networks

   University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Author : Maarig Aregawi Hagos; Marshed Mohamed; [2012]
   Keywords : cognitive radio; ergodic capacity; outage probability; SIMO; SINR;

   Abstract : This thesis report presents background knowledge about cognitive radio network (CRN) and investigates performance of underlay cognitive radio networks based on an adaptive power allocation policy of secondary transmitter (SU-Tx). In particular, it has been assumed that SU-Tx and primary user transmitter (PU-Tx) are equipped with a single antenna, while the corresponding receivers are equipped with multiple antennas. READ MORE

5. 19. Centralized Support Node for Mobility Management in Cognitive Radio Networks

   University essay from Blekinge Tekniska Högskola/Sektionen för datavetenskap och kommunikation

   Author : Srinivasan Jayaraman; Hemachandra Chowdari Gonuguntla; [2012]
   Keywords : Keywords: Cognitive radio; Signaling; Common control channel; mobility management;

   Abstract : Cognitive radio is expected to address several operational challenges like dynamic spectrum access, spectral heterogeneity and facilitate end-to-end Quality of Service (QOS). The complex nature of cognitive radio is due to its dependency on various network parameters at different levels and ambiguous standards. READ MORE

6. 20. Spectrum Sensing Techniques for 2-hop Cooperative Cognitive Radio Networks : Comparative Analysis

   University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Author : Atti Ur Rehman; Muhammad Asif; [2012]
   Keywords : Cognitive Radio; MIMO; Cooperative Communication; OSTBC; Energy Detection; Matched Filter Detetction; Cyclostationary Feature detection; Fuzzy Logic spectrum detection;

   Abstract : Spectrum sensing is an important aspect of cognitive radio systems. In order to efficiently utilize the spectrum, the role of spectrum sensing is essential in cognitive radio networks. READ MORE