Essays about: "Cognitive radio"

Showing result 11 - 15 of 60 essays containing the words Cognitive radio.

  1. 11. Performance Analysis of 3-hop using DAF and DF over 2-hop Relaying Protocols

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Faisal Mehmood; Muneeb Ejaz; [2013]
    Keywords : Bit Error Rate; Cognitive Radio; Decode Amplify and Forward; Energy Detection; Probability of Detection; Rayleigh Fading; Relay Network;

    Abstract : In wireless Communication, the need of radio spectrum increases nowadays. But in the system we are losing approximately 82-86% of spectrum most of the time due to the absence of Primary User (PU). To overcome this issue Cognitive Radio (CR) is an admirable approach. READ MORE

  3. 12. Minding the spectrum gaps : First steps toward developing a distributed white space sensor grid for cognitive radios

    University essay from KTH/Radio Systems Laboratory (RS Lab)

    Author : Javier Lara Peinado; [2013]
    Keywords : cognitive radio; cooperative spectrum sensing; energy detector; kognitiv radio; kooperativa spektrum avkänning; energi detektor;

    Abstract : The idea that the radio spectrum is growing ever more scarce has become commonplace, and is being reinforced by the recent bidding wars among telecom operators. New wireless applications tend to be deployed in the relatively narrow unlicensed frequency bands, worsening the problem of interference for all users. READ MORE

  4. 13. Spectrum sensing based on specialized microcontroller based white space sensors : Measuring spectrum occupancy using a distributed sensor grid

    University essay from KTH/Radio Systems Laboratory (RS Lab)

    Author : Julia Alba Tormo Peiró; [2013]
    Keywords : Cognitive radio; spectrum sensing; dynamic spectrum access; radio spectrum utilization; Kognitiv radio; spectrum sensing; dynamiskt spektrum tillgång; radiospektrum utnyttjas;

    Abstract : The continuing increase in the adoption and use of wireless technology aggravates the problem of spectrum scarcity due to the way we utilize the spectrum. The radio spectrum is a limited resource regulated by governmental agencies according to a fixed spectrum assignment policy. READ MORE

  5. 14. Optimization of Cognitive Radio in NLoS Backhauling of Small Cells

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Paresh Kumar Lakhani; Ajay Gul; Fahad Naveed; [2013]
    Keywords : Backhauling; Cognitive Radio; Link Budget; Long Term Evolution LTE ; Non Line of Sight NLoS ; Small Cell.;

    Abstract : The increasing demand of data access and user experience result in deployment of new technologies (3G, LTE, WiMAX, Cognitive Radio), Long Term Evolution (LTE) is one of them which promises to fulfill the variable demand of subscribers through small cells instead of macro cells. The backhauling of the small cells in densely populated urban area is again a very difficult task to handle with Government regulations (eccentricities) and restrictions. READ MORE

  6. 15. Alternative Mobile Broadband Deployment in Countries with Low Spectrum Allocation and Low Fixed Line Penetration

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Juan Pablo Lasso; [2013]
    Keywords : ;

    Abstract : 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. READ MORE