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Space-Time Coded OFDM with Low PAPR


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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Correspondence to Anand Venkataraman.

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Venkataraman, A., Reddy, H. & Duman, T.M. Space-Time Coded OFDM with Low PAPR. EURASIP J. Adv. Signal Process. 2006, 087125 (2006).

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  • Information Technology
  • Orthogonal Frequency Division Multiplex
  • Quantum Information
  • Fading Channel
  • Reduction Technique