Combined Time-Reversal Space-Time Block coding and Transmit Beamforming for Frequency-Selective Fading Channels

TitleCombined Time-Reversal Space-Time Block coding and Transmit Beamforming for Frequency-Selective Fading Channels
Publication TypeConference Paper
Year of Publication2008
AuthorsJonietz, C., W. H. Gerstacker, and R. Schober
Conference NameCommunications, 2008. ICC '08. IEEE International Conference on
Pagination3955 -3960
Date Publishedmay.
Keywordsblock codes, channel coding, fading channels, frequency-selective fading channels, reliable channel state information, space-time codes, time-reversal space-time block coding, transmit beamforming, unreliable CSIT pure space-time coding
Abstract

Transmit beamforming (BF) with reliable channel state information at the transmitter (CSIT) can improve the system performance significantly. On the other hand, for unreliable CSIT pure space-time coding outperforms transmit BF. In this paper, the combination of time-reversal space-time block codes (TR-STBCs) and transmit BF for transmission over frequency-selective fading channels is considered. The proposed scheme takes the reliability of the CSIT into account in an optimum way. For unreliable CSIT, the proposed scheme yields the same diversity gains as a TR-STBC, whereas for reliable CSIT significant BF gains can be obtained in addition to the diversity gain of the TR-STBC.

URLhttp://dx.doi.org/10.1109/ICC.2008.743
DOI10.1109/ICC.2008.743

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