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Space-time block coding for four transmit antennas with closed loop feedback over frequency selective fading channels

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conference contribution
posted on 08.01.2010, 15:16 authored by Cenk Toker, Sangarapillai LambotharanSangarapillai Lambotharan, Jonathon Chambers
Orthogonal space-time block coding is a transmit diversity method that has the potential to enhance forward capacity. For a communication system with a complex alphabet, full diversity and full code rate space-time codes are available only for two antennas, and for more than two antennas full diversity is achieved only when the code rate is lower than one. A quasi-orthogonal code could provide full code rate, but at the expense of loss in diversity, which results in degradation of performance. We propose a closed loop feedback scheme for quasi-orthogonal codes which provides full diversity while achieving the full code rate. We investigate, in particular, the performance of this scheme, when the feedback information is quantised and when the fading of the channel is frequency-selective.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

TOKER, C., LAMBOTHARAN, S. and CHAMBERS, J., 2003. Space-time block coding for four transmit antennas with closed loop feedback over frequency selective fading channels. IN: IEEE Proceedings Information Theory Workshop, 31 March-4 April, pp. 195-198

Publisher

© IEEE

Version

VoR (Version of Record)

Publication date

2003

Notes

This is a conference paper [© IEEE]. It is also available from: http://ieeexplore.ieee.org/servlet/opac?punumber=8588. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

ISBN

0780377990

Language

en