Block-Based Crest Factor Reduction
First Claim
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1. An apparatus for generating a multicarrier communication signal having a reduced crest factor, comprising:
- a sampling block unit for storing a block of input samples from a multicarrier communication signal; and
a crest factor reduction unit coupled to the sampling block memory for performing block-based processing to detect one or more signal peaks in the block of input samples stored in the sampling block memory which exceed a specified power threshold, and to cancel at least a first selected signal peak selected from the one or more signal peaks by applying a first cancellation pulse to the block of input samples stored in the sampling block memory which is phase-aligned with the selected signal peak.
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Abstract
A method and apparatus for a radio base station (200) generates a multicarrier communication signal having a reduced crest factor by processing a block of samples (231) with a peak search window (271) to identify and suppress signal peaks exceeding a power threshold value.
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Citations
20 Claims
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1. An apparatus for generating a multicarrier communication signal having a reduced crest factor, comprising:
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a sampling block unit for storing a block of input samples from a multicarrier communication signal; and a crest factor reduction unit coupled to the sampling block memory for performing block-based processing to detect one or more signal peaks in the block of input samples stored in the sampling block memory which exceed a specified power threshold, and to cancel at least a first selected signal peak selected from the one or more signal peaks by applying a first cancellation pulse to the block of input samples stored in the sampling block memory which is phase-aligned with the selected signal peak. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for generating a multicarrier communication signal having a reduced crest factor, comprising:
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generating a first multicarrier communication signal from a plurality of baseband transmission signals; storing a block of input samples from the first multicarrier communication signal in a sampling block memory; performing non-sequential, block-based processing on the block of input samples stored in the sampling block memory to suppress one or more signal peaks in the block of input samples by generating one or more cancellation pulse waveforms; and applying the one or more cancellation pulse waveforms to the block of input samples stored in the sampling block memory to generate a second multicarrier communication signal having a reduced crest factor. - View Dependent Claims (17, 18, 19, 20)
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Specification