Peak to average power ratio reduction
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United States of America Patent
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-
Nov 6, 2001
Grant Date -
N/A
app pub date -
Jun 5, 1998
filing date -
Jun 5, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present inventions provide methods and systems for reducing the peak to average power ratio of a multi-carrier signal. Reducing the peak to average power ratio of a signal ensures that amplifiers and transmitters are not saturated, causing loss of data. Further, reducing peak to average power ratios reduces the consumption of power during transmission. Peak to average power ratios is reduced by clipping an original signal at transmission. A receiver receives the clipped signal and makes an estimate of the clipped portions of the signal. Using iterative estimations an approximation is made of the clipped portions of the signal. The approximation of the clipped portions of the signal is used to estimate the original signal. The clipped signal reduces the peak to average power ratio of the transmitted signal, and estimation avoids the need for sending side information in order to decode the clipped signal.
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