Browsing by Keywords "Block codes"

Now showing items 1-6 of 6

    • EM based MAP channel estimation for turbo/convolutional coded SFBC/STBC-OFDM systems 

      Doǧan H.; Çirpan H.A.; Panayirci, E. (2006)
      We consider the design of turbo receiver structures for space-frequency block coded (SFBC/STBC) OFDM systems in unknown frequency selective fading channels. The Turbo receiver structures for SFBC/STBC-OFDM systems under ...

    • Guessing subject to distortion 

      Arikan, E.; Merhav, N. (Institute of Electrical and Electronics Engineers, 1998-05)
      We investigate the problem of guessing a random vector X within distortion level D. Our aim is to characterize the best attainable performance in the sense of minimizing, in some probabilistic sense, the number of required ...

    • Improved DST cryptanalysis of IDEA 

      Ayaz, E. S.; Selçuk, A. A. (Springer, 2007)
      In this paper, we show how the Demirci-Selcuk-Ture attack, which is currently the deepest penetrating attack on the IDEA block cipher, can be improved significantly in performance. The improvements presented reduce the ...

    • A low-complexity time-domain MMSE channel estimator for space-time/frequency block-coded OFDM systems 

      Şenol, H.; Çırpan, H. A.; Panayırcı, E.; Çevik, M. (Hindawi Publishing Corporation, 2006)
      Focusing on transmit diversity orthogonal frequency-division multiplexing (OFDM) transmission through frequency-selective channels, this paper pursues a channel estimation approach in time domain for both space-frequency ...

    • Multiresolution block coding method for visualization of compressed images in multimedia applications 

      Gerek, O. N.; Cetin, E. A. (Society of Photo-Optical Instrumentation Engineers, 1994)
      Multimedia and Picture Archiving and Communication System (PACS) applications require efficient ways of handling images for communication and visualization. In many Visual Information and Management Systems (VIMS), it may ...

    • On probability of success in linear and differential cryptanalysis 

      Selçuk, A. A. (Springer New York LLC, 2008-01)
      Despite their widespread usage in block cipher security, linear and differential cryptanalysis still lack a robust treatment of their success probability, and the success chances of these attacks have commonly been estimated ...