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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.
Email: j.armstrong@ee.latrobe.edu.au
This work was supported in part by the Australian Research Council
ABSTRACT
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.
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