Essays about: "Cognitive radio"

Showing result 31 - 35 of 60 essays containing the words Cognitive radio.

1. 31. HELPING COGNITIVE RADIO IN THE SEARCH FOR FREE SPACE

   University essay from Avdelningen för elektronik, matematik och naturvetenskap

   Author : Lee Gonzales Fuentes; [2012]
   Keywords : Discriminant analysis; spectrum sensing; cognitive radio; spectral component; Rice distribution;

   Abstract : Spectrum sensing is an essential pre-processing step of cognitive radio technology for dynamic radio spectrum management. One of the main functions of Cognitive radios is to detect the unused spectrum and share it without harmful interference with other users. READ MORE

3. 32. 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

4. 33. 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

5. 34. 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

6. 35. Directional Spectrum Sensing and Transmission Using a Sector Antenna

   University essay from Institutionen för informationsteknologi och medier

   Author : Bilal Hasan Qureshi; [2012]
   Keywords : Spectrum Sensing; Ray-tracing and Sector Antennas;

   Abstract : Spectrum sensing plays a key role for radio resource awareness in cognitive radio. To enhance the capabilities of cognitive radio nodes, exploiting the spatial resource in addition to frequency and time re-sources seems reasonable. READ MORE