Essays about: "Spectrum Sensing"

Showing result 21 - 25 of 59 essays containing the words Spectrum Sensing.

  1. 21. Fuzzy Based power control system Using ANFIS and MIMO-OFDM Techniques in Cognitive Radio Networks

    University essay from Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

    Author : Mahesh Aleti; Rahamatulla Syed; Rajendra Prasad Chennupati; [2014]
    Keywords : Cognitive Radio; Power Control; the Fuzzy Interference System FIS ; ANFIS; “MIMO” “Multiple Input Multiple Output” ; “OFDM” “Orthogonal Frequency Division Multiplexing” ; AWGN; BER; SNR; Eb N0;

    Abstract : Cognitive Radio technology is used for efficient utilization of the spectrum. There are two types of users, one is the Primary user (PU), and the second one is the Secondary user (SU). In those users, PU is having the license to use the spectrum. The SU does not have the license to use the spectrum. READ MORE

  3. 22. Combining hyperspectral UAV and mulitspectral FORMOSAT-2 imagery for precision agriculture applications

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Caroline Gevaert; [2014]
    Keywords : Physical Geography and Ecosystem analysis; GIS; precision agriculture; crop monitoring; data fusion; Earth and Environmental Sciences;

    Abstract : Precision agriculture requires detailed information regarding the crop status variability within a field. Remote sensing provides an efficient way to obtain such information through observing biophysical parameters, such as canopy nitrogen content, leaf coverage, and plant biomass. READ MORE

  4. 23. Study and Comparison of Spectrum Sensing Methods

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

    Author : Huimei Lu; [2014]
    Keywords : cognitive radio; spectrum sensing; PSE; MTSE; FBSE;

    Abstract : Efficient utilization of frequency bands has attracted more and more attention. Most of the licensed spectrum nowadays is under-utilized and some unlicensed services are allowed to use the available spectrum without causing harmful interference to the primary users. Therefore, unlicensed users should be able to detect spectrum holes reliably. READ MORE

  5. 24. Evaluation of Analytic Interference, Reception and Detection Modeling forIEEE 802.15.4 Networks with theMiXiM Omnet++ Framework

    University essay from KTH/Kommunikationsnät

    Author : Pedro Jorge Teixeira Sousa; [2013]
    Keywords : network simulation; omnet;

    Abstract : WirelessSensor Networks have emerged among the different wireless technologies sharingthe ISM spectrum band. This band sharing between the technologies started toraise coexistence issues in accessing the overpopulated spectrum. The WSN powerconstrains make them vulnerable to higher power devices, such as WLAN. READ MORE

  6. 25. 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