Essays about: "cognitive radios"

Showing result 1 - 5 of 12 essays containing the words cognitive radios.

  1. 1. 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

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

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

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

    Abstract : 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. READ MORE

  4. 3. An Effecient Scheme in IEEE 802.22 WRAN for Real Time and Non Real Time Traffic Delay

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

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

    Abstract : 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. READ MORE

  5. 4. 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

  6. 5. 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