Open Access

Space-Time Coded OFDM with Low PAPR

EURASIP Journal on Advances in Signal Processing20062006:087125

https://doi.org/10.1155/ASP/2006/87125

Received: 11 January 2005

Accepted: 1 September 2005

Published: 23 February 2006

Abstract

Recently the use of multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems has been proposed for signaling over frequency-selective fading channels. Although various aspects of these systems have been considered in the literature, the problem of the inherent high peak-to-average power ratio (PAPR) is not examined. In this paper, we consider PAPR reduction for MIMO-OFDM systems and propose alternate low-complexity algorithms that can be used in conjunction with the trellis shaping method. We show that a PAPR reduction in the order of 4- can be achieved at the cost of a slight reduction in the spectral efficiency. Furthermore, we compare the trellis shaping technique with other PAPR reduction techniques such as tone reservation and partial transmit sequences.

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Authors’ Affiliations

(1)
Department of Electrical Engineering, Arizona State University

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Copyright

© Venkataraman et al. 2006