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Cyclic delay transmission for unique word OFDM systems

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Abstract

In this article, we propose a cyclic delay diversity (CDD) transmission scheme for unique word (UW) OFDM system, which is denoted as CDD-UW-OFDM. In our proposed CDD-UW-OFDM system, the first transmit antenna transmits a UW-OFDM and then, for every UW-OFDM block, the i-th transmit antenna transmits a cyclically delayed version of the symbols transmitted at the first transmit antenna. With this proposed CDD-OFDM system, each antenna transmission is a UW-OFDM. Also, at the receiver under a certain condition on the cyclic delay amounts, the received signal is equivalent to that of a single transmit antenna UW-OFDM transmission with a longer multipath channel. We design the lengths of UW and cyclic delays to achieve the full multipath and spatial diversities for the CDD-UW-OFDM system when the linear MMSE receiver is used. We then present some simulation results to illustrate the claimed performance of the proposed system.

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Authors and Affiliations

  1. School of Electronic Information Engineering, Beihang University, Beijing, 100191, China

    Mang Liao & YouGuang Zhang

  2. Department of Electrical and Computer Engineering, University of Delaware, Newark, DE, 19711, USA

    XiangGen Xia

Authors
  1. Mang Liao
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  2. XiangGen Xia
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  3. YouGuang Zhang
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Correspondence to XiangGen Xia.

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Liao, M., Xia, X. & Zhang, Y. Cyclic delay transmission for unique word OFDM systems. Sci. China Inf. Sci. 57, 1–9 (2014). https://doi.org/10.1007/s11432-014-5093-9

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  • DOI: https://doi.org/10.1007/s11432-014-5093-9

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