Summary: Computationally Efficient Implementation of OFDM
Peak-to-Average Power Reduction Technique
Jean Armstrong and Michael Feramez
Department of Electronic Engineering, La Trobe University, Victoria 3086, Australia.
This work was supported in part by the Australian Research Council
The peak-to-average power of an orthogonal
frequency division multiplexed (OFDM) signal can be
reduced without increasing the out-of-band power by
clipping the amplitude of the oversampled baseband
time domain signal and filtering using a frequency
domain filter based on discrete Fourier transforms.
Clipping the amplitude however requires a division
operation and this is undesirable in digital signal
processing (DSP) implementations. In this paper it is
shown that a computationally efficient amplitude
reduction technique based on a look-up table can be
used with little degradation in performance.