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Adaptive Bit Loading and Transmit Diversity for Iterative OFDM Receivers

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Abstract

In this paper, we consider a transmission system employing orthogonal frequency division multiplexing with bit-interleaved coded modulation and perfect channel state information at both transmitter and receiver. An adaptive bit loading scheme in combination with cyclic delay diversity and discontinuous Doppler diversity is proposed at the transmitter and iterative demapping and decoding at the receiver. The loading procedure minimizes the bit-error rate at the decoder output, and the transmit diversity schemes mitigate channel correlations. We analyze the iterative receiver with extrinsic information transfer charts and present the achievable gains.

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Authors and Affiliations

  1. Institute of Communications and Navigation, German Aerospace Center (DLR), Oberpfaffenhofen, 82234, Wessling, Germany

    Stephan Sand & Christian Mensing

  2. Communication Technology Laboratory, Swiss Federal Institute of Technology (ETH) Zurich, Sternwartstrasse 7, Zurich, CH-8092, Switzerland

    Carlo Mutti & Armin Wittneben

Authors
  1. Stephan Sand
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  2. Christian Mensing
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  3. Carlo Mutti
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  4. Armin Wittneben
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Correspondence to Stephan Sand.

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Sand, S., Mensing, C., Mutti, C. et al. Adaptive Bit Loading and Transmit Diversity for Iterative OFDM Receivers. Wireless Pers Commun 47, 51–61 (2008). https://doi.org/10.1007/s11277-007-9390-0

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  • DOI: https://doi.org/10.1007/s11277-007-9390-0

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