Sökning: "Cognitive Radio"

Visar resultat 16 - 20 av 65 uppsatser innehållade orden Cognitive Radio.

1. 16. Alternative Mobile Broadband Deployment in Countries with Low Spectrum Allocation and Low Fixed Line Penetration

   Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

   Författare :Juan Pablo Lasso; [2013]
   Nyckelord :;

   Sammanfattning : The research work presented in this document deals with the problem of implementing high capacity mobile networks that are able to accommodate the ever increasing amounts of data traffic produced by mobile broadband users, given the dramatic expansion this service has experienced in the recent past due to the popularity of smartphones and tablets. Moreover, the analysis focuses in the feasibility of considering alternative deployment strategies that may render cost-efficient solutions while overcoming the challenges posed by the low amount of spectrum allocated to operators and the limited number of fixed telephone and internet lines available, which are characteristic of developing countries. LÄS MER

3. 17. Inter-Operator Spectrum sharing in Cellular Network using Repeated Game Theory

   Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Författare :Omer Khogali; [2013]
   Nyckelord :Game theory; Repeated game; Spectrum sharing; and Cognitive radio;

   Sammanfattning : Due to the limitation of spectrum in the network and the increasing of the demand of the spectrum in the network, spectrum-sharing techniques are used to increase the efficiency of the network. Dynamic Spectrum Sharing Network is one of the techniques that describe the intelligent networks such as Cognitive Radio networks, Cognitive Radio, and Software Defined Radios. LÄS MER

4. 18. Implementation and Analysis of Spectrum Sensing Algorithms for SIMO Links

   Master-uppsats, Kommunikationssystem; Tekniska högskolan

   Författare :Techin Eamrurksiri; [2013]
   Nyckelord :cognitive radio; USRP; OFDM; Spectrum sensing; GLRT; SDR;

   Sammanfattning : Cognitive radio is an autonomous transceiver that is continuously sensing theongoing communication in its environment, it then starts the communication whenever it is appropriate. Therefore, cognitive radio helps improving the spectrum utilization of the overall communication system. LÄS MER

5. 19. An Effecient Scheme in IEEE 802.22 WRAN for Real Time and Non Real Time Traffic Delay

   Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Författare :Nawfal Al-Zubaidi R-Smith; Khaled Humood; [2013]
   Nyckelord :Channel sensing; Cognitive radio; energy and feature detection; IEEE 802.22; quiet period;

   Sammanfattning : Cognitive radio network has emerged as a prevailing technique and an exciting and promising technology which has the potential of dealing with the inflexible prerequisites and the inadequacy of the radio spectrum usage. In cognitive radios, in-band sensing is fundamental for the protection of the licensed spectrum users, enabling secondary users to vacate channels immediately upon detection of primary users. LÄS MER

7. 20. ANFIS BASED OPPURTUNISTIC POWER CONTROL FOR COGNITIVE RADIO IN SPECTRUM SHARING

   Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Författare :Joyraj Chakraborty; Venkata Krishna chaithanya varma. Jampana; [2013]
   Nyckelord :ANFIS; Fuzzy inference system; spectrum sharing;

   Sammanfattning : Cognitive radio is a intelligent technology that helps in resolving the issue of spectrum scarcity. In a spectrum sharing network, where secondary user can communicate simultaneously along with the primary user in the same frequency band, one of the challenges in cognitive radio is to obtain balance between two conflicting goals that are to minimize the interference to the primary users and to improve the performance of the secondary user. LÄS MER