Peak-to-average power ratio reduction for OFDM modems

A novel technique of reducing the peak-to-average power ratio (PAPR) of multi-carrier (MC) modulated signals is proposed. The method advocated is spectrally efficient, has a low implementational complexity and hence it is also suitable for low-power, portable implementation. Moreover, it was designed to be compatible with existing standard-based orthogonal frequency division multiplex (OFDM) systems. As an example of the performance of the proposed scheme, the amplifier back-off requirement in a terrestrial digital video broadcast (DVB-T) system can be reduced to 12 to 6 dB, while satisfying the of out-of-band emission specifications imposed by the Federal Communication Commission (FCC) spectral mask.

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