Now showing items 1-13 of 13

    • Base station cooperation in orthogonal frequency division multiple access (OFDMA) systems 

      Tokel, T.B.; Aktaş, D. (2009)
      Achieving the targeted data rates for next generation wireless communication systems requires using frequency reuse ratio 1 in these systems, but this in turn results in significant intercell interference observed especially ...
    • A communication scheme by using synchronized chaotic systems 

      Morgül, Ömer; Feki, Moez (IEEE, 1996)
      A method to synchronize systems with chaotic behavior, in a master-slave configuration adapted to communication systems, is discussed. This work is motivated by the need for secure communication. In this method, the ...
    • Detection of microcalcifications in mammograms using nonlinear subband decomposition and outlier labeling 

      Gürcan, M. Nafi; Yardımcı, Yasemin C.; Çetin, A. Enis; Ansari, R. (SPIE, 1997-02)
      Computer-aided diagnosis will be an important feature of the next generation picture archiving and communication systems. In this paper, computer-aided detection of microcalcifications in mammograms using a nonlinear subband ...
    • Effects of additional independent noise in binary composite hypothesis-testing problems 

      Bayram, Suat; Gezici, Sinan (IEEE, 2009-09)
      Performance of some suboptimal detectors can be improved by adding independent noise to their observations. In this paper, the effects of adding independent noise to observations of a detector are investigated for binary ...
    • Noise-enhanced M-ary hypothesis-testing in the minimax framework 

      Bayram, S.; Gezici, S. (2009)
      In this study, the effects of adding independent noise to observations of a suboptimal detector are studied for M-ary hypothesis-testing problems according to the minimax criterion. It is shown that the optimal additional ...
    • Novel predistortion algorithm for OFDMA 

      Ali, S.; Markarian, G.; Arıkan, Erdal (IEEE, 2009)
      The RF amplifier in a wireless communication system is usually non-linear in nature. If such an amplifier is used in OFDMA based systems, it will cause serious degradation. This degradation will be both in terms of the ...
    • Optimal channel switching for average capacity maximization 

      Sezer, Ahmet Dündar; Gezici, Sinan; İnaltekin, H. (IEEE, 2014-05)
      Optimal channel switching is proposed for average capacity maximization in the presence of average and peak power constraints. A necessary and sufficient condition is derived in order to determine when the proposed optimal ...
    • An optimal network dimensioning and initial energy assignment minimizing the monetary cost of a heterogeneous WSN 

      Sevgi, Cüneyt; Kocyigit, A. (IEEE, 2009)
      In this paper, a novel method is proposed to dimension a randomly deployed heterogeneous Wireless Sensor Network (WSN) of minimum monetary cost satisfying minimum coverage and minimum lifetime requirements. We consider ...
    • Power-source-aware backbone routing in wireless sensor networks 

      Tekkalmaz, Metin; Körpeoğlu, İbrahim (IEEE, 2010-11)
      Due to the limited energy-source and mostly unattended nature of the wireless sensor networks, efficient use of energy has a critical importance on the lifetime of the applications accomplished by such networks. Although ...
    • Pulse shape design using iterative projections 

      Güven, H. Emre; Çetin, A. Enis (IEEE, 2005-09)
      In this paper, the pulse shape design for various communication systems including PAM, FSK, and PSK is considered. The pulse is designed by imposing constraints on the time and frequency domains constraints on the ...
    • Simulation of a digital communication system 

      Güngör, A.; Arıkan, F.; Arıkan, Orhan (IEEE, 2005-09)
      In this paper, basic components of a digital communication system are simulated by a computer program. The simulation program is modular and flexible to incorporate any future additions and updates. The simulation program ...
    • Special Issue on Advances in Channel Coding 

      Arikan, E.; Lentmaier, M.; Montorsi, G. (Korean Institute of Communication Sciences, 2015)
      Since the invention of turbo codes in 1993 there has been an enormous interest and progress in the field of capacity approaching code constructions. Many classical constructions have been replaced by newer, better performing ...
    • Task assignment in heterogeneous computing systems 

      Ucar, B.; Aykanat, C.; Kaya, K.; Ikinci, M. (Academic Press, 2006-01)
      The problem of task assignment in heterogeneous computing systems has been studied for many years with many variations. We consider the version in which communicating tasks are to be assigned to heterogeneous processors ...