Systems and methods for reducing peak to average power ratio
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United States of America Patent
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Issued Date -
Aug 6, 2015
app pub date -
Feb 2, 2014
filing date -
Feb 2, 2014
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Abandoned
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Abstract
Various embodiments of wireless communication systems and methods in which the system applies a clipping and filtering procedures iteratively in order to reduce the peak-to-average power ratio of a transmission. In various embodiments, the clipping level changes in each iteration. In various embodiments, the clipping mechanism is a polar clipping mechanism. In various embodiments, out-of-band signal filtering is executed by a filter. In various embodiments, there is a pre-clipping process, which may be executed by a decimation mechanism, or alternatively by a zero-padding mechanism. In various embodiments, the clipping mechanism and filter are embedded in one or more processors, any one of which may be a DSP processor. In various embodiments, clipping levels are determined by a look-up table.
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