Space-time codes

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2010

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Karaçayır, Murat

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The phenomenon of fading constitutes a fundamental problem in wireless communications. Researchers have proposed many methods to improve the reliability of communication over wireless channels in the presence of fading. Many studies on this topic have focused on diversity techniques. Transmit diversity is a common diversity type in which multiple antennas are employed at the transmitter. Space-time coding is a technique based on transmit diversity introduced by Tarokh et alii in 1998. In this thesis, various types of space-time codes are examined. Since they were originally introduced in the form of trellis codes, a major part is devoted to space-time trellis codes where the fundamental design criteria are established. Then, space-time block coding, which presents a different approach, is introduced and orthogonal spacetime block codes are analyzed in some detail. Lastly, rank codes from coding theory are studied and their relation to space-time coding are investigated.

Subject Keywords

Cryptography.

URI

http://etd.lib.metu.edu.tr/upload/12612028/index.pdf
https://hdl.handle.net/11511/19685

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Graduate School of Applied Mathematics, Thesis

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Citation Formats

M. Karaçayır, “Space-time codes,” M.S. - Master of Science, Middle East Technical University, 2010.