A robust STBC-based transmit diversity scheme for OFDM systems over spatially transmit correlated fading channels

Eunseok Ko, Daesik Hong

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this paper, we propose a robust space-time block coded (STBC)-based transmit diversity scheme with low decoding complexity against spatially transmit-correlated fading channels compared with the conventional STBC orthogonal frequency-division multiplexing (STBC-OFDM) schemes. The proposed scheme is comprised of Alamouti code for spatial diversity and a simple mapping process with subcarrier selection for frequency diversity. Proceeding from a detailed analysis of the rank and determinant of the channel correlation matrix, we present a proper subcarrier selection scheme satisfying the conditions for robustness against spatial transmit correlation. Furthermore, when the receiver employs a low-complexity decoder such as a zero-forcing decoder, the proposed scheme shows improved performance compared with the existing space-frequency coded OFDM schemes.

Original languageEnglish
Pages (from-to)984-991
Number of pages8
JournalIEEE Transactions on Vehicular Technology
Volume56
Issue number2
DOIs
Publication statusPublished - 2007 Mar 1

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Transmit Diversity
Fading Channels
Orthogonal Frequency Division multiplexing (OFDM)
Fading channels
Orthogonal frequency division multiplexing
Space-time
Decoding
Spatial Diversity
Zero-forcing
Correlation Matrix
Low Complexity
Determinant
Receiver
Robustness

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

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abstract = "In this paper, we propose a robust space-time block coded (STBC)-based transmit diversity scheme with low decoding complexity against spatially transmit-correlated fading channels compared with the conventional STBC orthogonal frequency-division multiplexing (STBC-OFDM) schemes. The proposed scheme is comprised of Alamouti code for spatial diversity and a simple mapping process with subcarrier selection for frequency diversity. Proceeding from a detailed analysis of the rank and determinant of the channel correlation matrix, we present a proper subcarrier selection scheme satisfying the conditions for robustness against spatial transmit correlation. Furthermore, when the receiver employs a low-complexity decoder such as a zero-forcing decoder, the proposed scheme shows improved performance compared with the existing space-frequency coded OFDM schemes.",
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A robust STBC-based transmit diversity scheme for OFDM systems over spatially transmit correlated fading channels. / Ko, Eunseok; Hong, Daesik.

In: IEEE Transactions on Vehicular Technology, Vol. 56, No. 2, 01.03.2007, p. 984-991.

Research output: Contribution to journalArticle

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