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: 7 September 2004

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
(2)
School of Electrical and Computer Engineering, Georgia Institute of Technology

Copyright

© Lee and Williams. 2004