Crest factor reduction with phase optimization
AssigneeNetLogic Microsystems, Inc.
InventorFarrokh Farrokhi
Life of this patent
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Abstract
A system for reducing peaks comprises a processor and a memory. The processor is configured to determine phase offsets for a plurality of input signals. The phase offsets are determined using trials of phase offsets to determine a selected set of phase offsets. The processor is further configured to modulate the input data signals using the selected set of phase offsets to produce modulated phase offset data signals and to generate a sum of modulated phase offset data signals, such that the sum has a lower peak value as compared to the sum not using the selected set of phase offset signals.
Claims20
A system for reducing peaks, comprising:
- a processor configured to perform a plurality of trials to:
- determine a plurality of phase offsets for a plurality of input data signals to determine a selected set of phase offsets;
- modulate the plurality of input data signals using a corresponding phase offset from the selected set of phase offsets to produce a plurality of modulated phase offset data signals;
- generate a sum of the plurality of modulated phase offset data signals,
- adjust the plurality of phase offsets for each trial of the plurality of trials;
- and
- select the plurality of phase offsets that produces a lowest sum.
A method for reducing peaks, comprising:
- performing a plurality of trials to determine a plurality of phase offsets for a plurality of input data signals to determine a selected set of phase offsets;
- modulating the plurality of input data signals using a corresponding phase offset from the selected set of phase offsets to produce a plurality of modulated phase offset data signals;
- generating a sum of the plurality of modulated phase offset data signals,
- adjusting the plurality of phase offsets for each trial of the plurality of trials;
- and
- selecting the plurality of phase offsets that produces a lowest sum.
Dependencies are inferred from the claim text.