Now showing items 1-9 of 9

    • Antenna analysis 

      Tunç, Celal Alp (Bilkent University, 2009)
      Multiple-input-multiple-output (MIMO) wireless communication systems have been attracting huge interest, since a boost in the data rate was shown to be possible, using multiple antennas both at the transmitter and receiver. ...
    • Efficient channel estimation for reconfigurable MIMO antennas: training techniques and performance analysis 

      Bahceci, I.; Hasan, M.; Duman, T. M.; Cetiner, B. A. (Institute of Electrical and Electronics Engineers Inc., 2017)
      Multifunctional and reconfigurable multiple-input multiple-output (MR-MIMO) antennas are capable of dynamically changing the operation frequencies, polarizations, and radiation patterns, and can remarkably enhance system ...
    • Investigation of planar and conformal printed arrays for MIMO performance analysis 

      Tunc, C.A.; Irci, E.; Bakir O.; Aktas, D.; Erturk V.B.; Altintas, A. (2006)
      MIMO channel capacity of printed arrays with dipole elements is analyzed. A MIMO channel model based on electric fields is used. The effects of mutual interactions among the array elements through space and surface waves ...
    • A model with electric fields for the inclusion of mutual coupling effects in the MIMO channel 

      Tunç, Celal Alp; Ircı, Erdinç; Bakır, Onur; Aktaş, Defne; Ertürk, Vakur B.; Altıntaş, Ayhan (IEEE, 2007)
      Multiple input multiple output (MIMO) wireless communication systems have been a focus of interest, due to their ability to increase the capacity in rich scattering environments by using multi-element antenna arrays both ...
    • Multi-input multi-output deletion channel 

      Wang F.; Duman, T. M. (Institute of Electrical and Electronics Engineers, 2012)
      We describe a new channel model suitable in certain applications, namely the multi-input multi-output (MIMO) deletion channel. This channel models the scenarios where multiple transmitters and receivers suffering from ...
    • Optimization of linear wire antenna arrays to increase MIMO capacity using swarm intelligence 

      Olgun, Uğur; Tunç, Celal Alp; Aktaş, Defne; Ertürk, Vakur B.; Altıntaş, Ayhan (Institution of Engineering and Technology, 2007)
      Free standing linear arrays (FSLA) are analyzed and optimized to increase MIMO capacity. A MIMO channel model based on electric fields is used. The effects of mutual interactions among the array elements are included into ...
    • Particle swarm optimization of dipole arrays for superior MIMO capacity 

      Olgun, U.; Tunc, C. A.; Aktas, D.; Ertürk, V. B.; Altintas, A. (WILEY, 2009)
      The particle swarm optimization (PSO) technique is employed to design MIMO arrays for superior capacity. A channel model based on the method of moments solution of the electric field integral equation is utilized with PSO ...
    • A Performance comparision of polar codes with convolutional turbo codes 

      Özgür, Üstün (Bilkent University, 2009)
      Polar codes introduced recently by Arıkan are the first low-complexity codes achieving symmetric capacity for arbitrary binary-input discrete memoryless channels (B-DMCs). Although being theoretically significant, their ...
    • V-BLAST/MAP : a new symbol detection algorithm for mimo channels 

      Yapıcı, Yavuz (Bilkent University, 2005)
      In this thesis, we introduce a new symbol detection algorithm for MIMO channels. This algorithm is an extension of the well-known V-BLAST algorithm. The new algorithm, V-BLAST/MAP, combines elements of the V-BLAST ...