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  • Research Article
  • Open Access

Bandwidth Efficient OFDM Transmitter Diversity Techniques

EURASIP Journal on Advances in Signal Processing20042004:240895

https://doi.org/10.1155/S1110865704310139

  • Received: 17 December 2002
  • Published:

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.

Keywords and phrases

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

Authors’ Affiliations

(1)
Multimedia Architecture Lab, Motorola Labs, Schaumburg, IL 60196, USA
(2)
School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0250, USA

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