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K. Panta and J. Armstrong: Spectral Analysis of OFDM Signals and its Improvement by Polynomial Cancellation Coding Contributed Paper
 

Summary: K. Panta and J. Armstrong: Spectral Analysis of OFDM Signals and its Improvement by Polynomial Cancellation Coding
Contributed Paper
Manuscript received July 11, 2003 0098 3063/00 $10.00 2003 IEEE
939
Abstract-- In orthogonal frequency division multiplexing
(OFDM) systems, the subcarriers are generated by an inverse
discrete Fourier transform. In the literature, the spectra of
these subcarriers are often represented by a sequence of sinc
functions of the same polarity. This is not consistent with the
intercarrier interference (ICI) cancellation properties of
polynomial cancellation coding (PCC) or similar self-ICI
cancellation schemes in OFDM. This paper shows the spectra
of these subcarriers are more accurately represented by a
sequence of sinc functions with alternating polarity. It is
shown that the spectral rolloff of OFDM signals can be
improved by PCC and the resultant OOB power is much
reduced.
Index Terms-- Spectral Analysis, OFDM, Out-of-band
(OOB) power.
I. INTRODUCTION

  

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

 

Collections: Engineering