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OFDM Peak-to-Average Power Reduction Scheme with Spectral Masking
 

Summary: OFDM Peak-to-Average Power Reduction Scheme
with Spectral Masking
Himal A. Suraweera, Kusha R. Panta, Michael Feramez and Jean Armstrong
Department of Electronic Engineering, La Trobe University,
Melbourne Victoria 3086, Australia.
E-mail: j.armstrong@latrobe.edu.au
Abstract-- Clipping and filtering can be a simple and effective
method of reducing the peak-to-average power ratio (PAPR) for
an orthogonal frequency division multiplexed (OFDM) signal. To
be effective the clipping must be performed on an oversampled
version of the time domain signal, but this results in out-of-
band (OOB) power. It has previously been shown that the OOB
signals can be filtered out using a discrete Fourier transform
(DFT) based filter. However filtering causes peak regrowth, and
an increase in PAPR. In this paper it is shown that if the
OOB power is limited rather than completely eliminated much
less peak regrowth occurs. Simulation results are presented for
HIPERLAN2.
I. INTRODUCTION
Orthogonal frequency division multiplexing (OFDM) tech-

  

Source: Armstrong, Jean - Department of Electrical and Computer Systems Engineering, Monash University

 

Collections: Engineering