Open Access

Space-Time Coded OFDM with Low PAPR

EURASIP Journal on Advances in Signal Processing20062006:087125

Received: 11 January 2005

Accepted: 1 September 2005

Published: 23 February 2006


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.


Authors’ Affiliations

Department of Electrical Engineering, Arizona State University


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© Venkataraman et al. 2006