Tone Reservation Based on Fourier Transformed Sequence for PAPR Reduction in OFDM Systems

This paper presents a new technique to reduce the peak-to-average power ratio (PAPR) in OFDM system by insertion of extra semi-dummy sequence in frequency domain. The extra sequence is generated via Fourier transform of a number of the data modulated symbols. The proposed technique provides instant frequency domain process for the PAPR problem solution. For the 16PSK-OFDM system using 512 subcarrier, the new technique achieved reduction in PAPR at CCDF≤10-4 by up to 8 dB at a cost of drop in data rate by only 0.4%. With adaptive operation, the proposed PAPR technique restrains significantly the transmission power when the PAPR reduction gain is limited by 2.5 dB.

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