Essays about: "CRN"

Showing result 11 - 15 of 19 essays containing the word CRN.

  1. 11. Increasing model robustness for stem cell regulation in plant shoots

    University essay from Lunds universitet/Beräkningsbiologi och biologisk fysik - Genomgår omorganisation

    Author : Niklas Korsbo; [2013]
    Keywords : WUSCHEL; CLAVATA; CLAVATA3; CORYNE; WUS; CLV3; CRN; meristem; stem cells; stem cell; model; feedback; network; Arabidopsis; signal; signaling; buffering; promoter; Physics and Astronomy;

    Abstract : The transcription factor WUSCHEL and the peptide CLAVATA3 have key roles to plat in the regulatory network effecting the differentiation of the stem cells at the shoot apical meristem of Arabidopsis. The signal pathway of this network has been under investigation for several years and models utilizing the already identified parts of the network have been developed. READ MORE

  3. 12. OPTIMIZED FUZZY BASED POWER CONTROL STRATEGY IN COGNITIVE RADIO NETWORKS IN MULTI FADING PROPAGATION ENVIRONMENTS

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Praneeth Kumar Bejjenki; Muneeb Ahmed Goraya; Syed Fovad Moid; [2013]
    Keywords : Cognitive Radio Networks; Spectrum Sharing Networks; Power Control; Takagi-Sugeno Fuzzy Inference System; m-Nakagami fading channel; OFDM.;

    Abstract : In this thesis we have considered a cognitive radio network (CRN) with a pair of primary user (PU) and secondary user (SU) in spectrum sharing networks in path-loss and without path-loss propagation environments under identically distributed m-Nakagami fading channel. The thesis consists of three parts. READ MORE

  4. 13. Effect of Primary Network on Performance of Spectrum Sharing System over Nakagami-m Fading Channel

    University essay from Blekinge Tekniska Högskola/Institutionen för kommunikationssystem

    Author : Fahim Khan; Pierre Celestin Mazarati; Nasir Khan; [2013]
    Keywords : Cognitive Radio Network CRN ; Amplify and Forward AF ; Nakagami-m fading channel; Cooperative Spectrum Sharing.;

    Abstract : During the last few years, we have witnessed that radio spectrum is becoming a valuable and scarce resource due to the increasing demand of multimedia services. However, recent research has shown that most of the available radio spectrum is not used effectively and is wasted. READ MORE

  5. 14. Spectrum Management in Cognitive Radio Ad Hoc Networks (CRAHNs) Using Bio-inspired Optimization Algorithms

    University essay from Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE)

    Author : Mahboobeh Parsapoor; [2013]
    Keywords : CRN; spectrum;

    Abstract : Cognitive Radio Network (CRN) has an important role in next generation wireless networks; it can potentially provide higher performance of wireless communication networks in terms of reliability, scalability, stability and spectrum efficiency. Cognitive radio networks are on the basis of radio nodes equipped with a cognitive engine (CE); it can manage spectrum and change transmission parameters using artificial intelligence methods in particular bio-inspired optimization methods. READ MORE

  6. 15. Impact of Interference from Primary User on the Performance of Cognitive Radio Networks

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Maarig Aregawi Hagos; Marshed Mohamed; [2012]
    Keywords : cognitive radio; ergodic capacity; outage probability; SIMO; SINR;

    Abstract : This thesis report presents background knowledge about cognitive radio network (CRN) and investigates performance of underlay cognitive radio networks based on an adaptive power allocation policy of secondary transmitter (SU-Tx). In particular, it has been assumed that SU-Tx and primary user transmitter (PU-Tx) are equipped with a single antenna, while the corresponding receivers are equipped with multiple antennas. READ MORE