Einzeltreffer — DigiBib

Block-based crest factor reduction (CFR) techniques are provided. An exemplary block-based crest factor reduction method comprises obtaining a block of data samples comprised of a plurality of samples; applying the block of data to a crest factor reduction block; and providing a processed block of data from the crest factor reduction block. The block-based crest factor reduction method can optionally be iteratively performed a plurality of times for the block of data. The block of data samples can comprise an expanded block having at least one cursor block. For example, at least two pre-cursor blocks and one post-cursor block can be employed. The peaks can be cancelled, for example, only in the block of data samples and in a first of the pre-cursor blocks.

Titel:	BLOCK-BASED CREST FACTOR REDUCTION (CFR)
Link:	View record in USPTO Patent Applications (Volltext)
Veröffentlichung:	2014
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Applications Sprachen: English Document Number: 20140072073 Publication Date: March 13, 2014 Appl. No: 13/701415 Application Filed: October 26, 2012 Assignees: LSI Corporation (Milpitas, CA, US) Claim: 1. A block-based crest factor reduction method, comprising: obtaining a block of data samples comprised of a plurality of samples; applying said block of data to a crest factor reduction block; and providing a processed block of data from said crest factor reduction block. Claim: 2. The method of claim 1, wherein said crest factor reduction block comprises a processor implementing a crest factor reduction algorithm using software instructions. Claim: 3. The method of claim 1, wherein said crest factor reduction block comprises one or more peak detector and pulse cancellers. Claim: 4. The method of claim 1, wherein said method is iteratively performed a plurality of times for said block of data. Claim: 5. The method of claim 1, wherein said block of data samples comprises an expanded block having at least one cursor block. Claim: 6. The method of claim 5, further comprising the step of dropping said at least one cursor block before providing said processed block of data from said crest factor reduction block. Claim: 7. The method of claim 5, wherein said at least one cursor block comprises at least two pre-cursor blocks and one post-cursor block. Claim: 8. The method of claim 7, wherein peaks are cancelled only in said block of data samples and in a first of said pre-cursor blocks. Claim: 9. A digital processor configured to perform block-based Crest Factor Reduction, comprising: a memory; and at least one hardware device, coupled to the memory, operative to: obtain a block of data samples comprised of a plurality of samples; apply said block of data to a crest factor reduction algorithm; and provide a processed block of data from said crest factor reduction algorithm. Claim: 10. The digital processor method of claim 9, wherein said at least one hardware device implements said crest factor reduction algorithm using software instructions. Claim: 11. The digital processor of claim 9, wherein said crest factor reduction algorithm employs one or more peak detector and pulse cancellers. Claim: 12. The digital processor of claim 9, wherein said crest factor reduction algorithm is iteratively performed a plurality of times for said block of data. Claim: 13. The digital processor of claim 9, wherein said block of data samples comprises an expanded block having at least one cursor block. Claim: 14. The digital processor of claim 13, wherein said at least one hardware device is further configured to drop said at least one cursor block before providing said processed block of data from said crest factor reduction block. Claim: 15. The digital processor of claim 13, wherein said at least one cursor block comprises at least two pre-cursor blocks and one post-cursor block. Claim: 16. The digital processor of claim 15, wherein peaks are cancelled only in said block of data samples and in a first of said pre-cursor blocks. Claim: 17. A block-based crest factor reduction block, comprising: an input port to receive a block of data samples comprised of a plurality of samples; a block-based peak detector and pulse canceller to perform said block-based crest factor reduction: and an output port to provide a processed block of data. Claim: 18. The block-based crest factor reduction block of claim 17, wherein said block-based crest factor reduction is iteratively performed a plurality of times for said block of data. Claim: 19. The block-based crest factor reduction block of claim 17, wherein said block of data samples comprises an expanded block having at least one cursor block. Claim: 20. The block-based crest factor reduction block of claim 19, wherein said provided processed block of data does not include said at least one cursor block. Claim: 21. The block-based crest factor reduction block of claim 19, wherein said at least one is cursor block comprises at least two pre-cursor blocks and one post-cursor block. Claim: 22. The block-based crest factor reduction block of claim 21, wherein peaks are cancelled only in said block of data samples and in a first of said pre-cursor blocks. Current U.S. Class: 375/296 Current International Class: 04

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BLOCK-BASED CREST FACTOR REDUCTION (CFR)