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Bandwidth Efficient OFDM Transmitter Diversity Techniques

Abstract

Space-time block-coded orthogonal frequency division multiplexing (OFDM) transmitter diversity techniques have been shown to be efficient means of achieving near-optimal diversity gain in frequency-selective fading channels. However, these known techniques all require a cyclic prefix to be added to the transmitted symbols, resulting in bandwidth expansion. In this paper, iterative space-time and space-frequency block-coded OFDM transmitter diversity techniques are proposed that exploit spatial diversity to improve spectral efficiency by eliminating the need for a cyclic prefix.

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Correspondence to King F. Lee.

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Lee, K.F., Williams, D.B. Bandwidth Efficient OFDM Transmitter Diversity Techniques. EURASIP J. Adv. Signal Process. 2004, 240895 (2004). https://doi.org/10.1155/S1110865704310139

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Keywords and phrases

  • space-time coding
  • space-frequency coding
  • transmitter diversity
  • OFDM
  • channel estimation
  • pilot symbols