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Summary: 668 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 3, NO. 2, MARCH 2004
Effects of Clipping on the Error Performance of
OFDM in Frequency Selective Fading Channels
Kusha R. Panta and Jean Armstrong
Abstract--Previous studies on the effect of the clipping noise
on the error performance of orthogonal frequency-division
multiplexing (OFDM) systems in frequency selective fading
channels provide pessimistic results. They do not consider the
effect of channel fading on the clipping noise. The clipping noise
is added at the transmitter and hence fades with the signal. Here,
the authors show that the "bad" subcarriers that dominate the
error performance of the OFDM system are least affected by
the clipping noise and, as a result, the degradation in the error
performance of OFDM system in fading channels is very small.
Index Terms--Frequency selective fading channel, in-band dis-
tortion and clipping noise, orthogonal frequency-division multi-
plexing (OFDM), peak-to-average power ratio (PAPR).
I. INTRODUCTION
AMAJOR disadvantage of orthogonal frequency division
multiplexing (OFDM) is that it has a high peak-to-average
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