Sökning: "cooperative spectrum sensing"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden cooperative spectrum sensing.

  1. 1. Outage Probability Analysis of CooperativeCognitive Radio Networks Over κ − μ Shadowed Fading Channels

    Master-uppsats, Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

    Författare :Mahathi Poreddy; [2016]
    Nyckelord :Cognitive Radio Networks; Cooperative Communications; Decode-and-Forward Relays; Multiple-relay; Outage Probability;

    Sammanfattning : Over time, wireless technology advancements in the field of communications have been attracting every individual to turn into a wireless user. To accommodate the increasing number of users and to avoid the problem of spectrum scarcity, the concept of Cognitive Radio Network (CRN) has been developed. LÄS MER

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

    Master-uppsats, KTH/Radio Systems Laboratory (RS Lab)

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

    Sammanfattning : 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. LÄS MER

  4. 3. Spectrum Sensing Techniques for 2-hop Cooperative Cognitive Radio Networks : Comparative Analysis

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Atti Ur Rehman; Muhammad Asif; [2012]
    Nyckelord :Cognitive Radio; MIMO; Cooperative Communication; OSTBC; Energy Detection; Matched Filter Detetction; Cyclostationary Feature detection; Fuzzy Logic spectrum detection;

    Sammanfattning : 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. LÄS MER

  5. 4. APPLYING DISTRIBUTED ORTHOGONAL SPACE TIME BLOCK CODING IN COOPERATIVE COMMUNICATION NETWORKS

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :James Adu Ansere; Odion Ehimiaghe; [2012]
    Nyckelord :Decode and Forward; BER; DOSTBC; Cooperative communications;

    Sammanfattning : In this research, we investigate cooperative spectrum sensing using distributed orthogonal space time block coding (DOSTBC). Multiple antennas are introduced at the transmitter and the receiver to achieve higher cooperative diversity in the cooperative wireless (CW) networks. LÄS MER

  7. 5. Spectrum Sensing of Cognitive Radio Networks using Amplify and Forward Relay over Correlated Nakagami-m Fading Channel

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Suman Dongol Maharjan; [2011]
    Nyckelord :Amplify-and-forward AF ; orthogonal space-time codes OSTBCs ; correlated Nakagami-m fading; detection probability; cognitive radio.;

    Sammanfattning : In the last ten years, we have been witnessing the vast growth in wireless communications due to the popularity of many wireless devices, mobiles, smart phones etc. As a result, the demand for high data rates, bandwidth, and spectrum utilization has increased. LÄS MER