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A Low Complexity IFFT-Based PTS Technique for PAPR Reduction in OFDM Systems

A low complexity partial transmit sequence (PTS) technique for reducing the peak-to-average power ratio (PAPR) of an orthogonal frequency division multiplexing (OFDM) signal is presented. Signals at the middle stages of an Appoint radix IFFT are considered for PTS subblocking. We use decimation in frequency (DIF) and propose a low complexity technique, called decomposition PTS (D-PTS) subblocking, where subblocks are assigned through different stages of the transform. This new technique reduces the multiplicative complexity, while providing PAPR reduction similar to other techniques such as ordinary PTS (O-PTS). Moreover, it has lower additive complexity.