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Title: Closed-loop quasi-orthogonal STBCs and their performance in multipath fading environments and when combined with turbo codes
Authors: Toker, Cenk
Lambotharan, Sangarapillai
Chambers, Jonathon
Keywords: Antenna selection
Beamformers
Closed loop feedback
Frequency selective channel
Quasi-orthogonal space-time block codes (QO-STBCs)
Transmit diversity
Turbo codes
Issue Date: 2004
Publisher: © IEEE
Citation: TOKER, C., LAMBOTHARAN, S. and CHAMBERS, J., 2004. Closed-loop quasi-orthogonal STBCs and their performance in multipath fading environments and when combined with turbo codes. IEEE Transactions on Wireless Communication, 3 (6), pp. 1890-1896
Abstract: Quasi-orthogonal space-time block codes (QO-STBCs) achieve full code rate at the expense of loss in diversity gain. We propose two feedback methods for QO-STBCs to achieve full diversity and full code rate. In the first method, signals radiated from various antennas are rotated by phasors according to feedback from the receiver, whereas the second method is based upon antenna weighting/selection. For high to moderate feedback error rates, it is demonstrated that the proposed methods outperform the quantized transmit beamformer. The performance improvement is also investigated for these closed-loop methods when the transmitted signal is error control coded.
Description: This is an article from the journal, IEEE Transactions on Wireless Communications [© IEEE]. It is also available at: http://ieeexplore.ieee.org/ 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.
Version: Published
DOI: 10.1109/TWC.2004.837401
URI: https://dspace.lboro.ac.uk/2134/5788
ISSN: 1536-1276
Appears in Collections:Published Articles (Electronic, Electrical and Systems Engineering)

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