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Multi-stage crest factor reduction (CFR) techniques are provided for multi-channel multi-standard radio (MSR). A multi-stage crest factor reduction method comprises applying one or more data samples associated with at least one channel of a first technology type to a first individual crest factor reduction block; applying one or more data samples associated with at least one channel of a second technology type to a second individual crest factor reduction block; aggregating outputs of the first and second individual crest factor reduction blocks to generate an aggregated output; and applying the aggregated output to a composite crest factor reduction block. The individual crest factor reduction blocks can be implemented using a sampling rate appropriate for the corresponding technology type. The composite crest factor reduction block operates at a higher sampling rate than the individual crest factor reduction blocks.

Titel:	MULTI-STAGE CREST FACTOR REDUCTION (CFR) FOR MULTI-CHANNEL MULTI-STANDARD RADIO
Link:	View record in USPTO Patent Applications (Volltext)
Veröffentlichung:	2013
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Applications Sprachen: English Document Number: 20130114761 Publication Date: May 9, 2013 Appl. No: 13/661351 Application Filed: October 26, 2012 Assignees: LSI Corporation (Milpitas, CA, US) Claim: 1. A multi-stage crest factor reduction method, comprising: applying one or more data samples associated with at least one channel of a first technology type to a first individual crest factor reduction block; applying one or more data samples associated with at least one channel of a second technology type to a second individual crest factor reduction block; aggregating outputs of said first and second individual crest factor reduction blocks to generate an aggregated output; and applying said aggregated output to a composite crest factor reduction block. Claim: 2. The method of claim 1, wherein said technology type comprises one or more of Global System for Mobile Communications (GSM), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), Worldwide interoperability for Microwave Access (WiMAX) and Long Term Evolution (LTE). Claim: 3. The method of claim 1, wherein said individual crest factor reduction blocks are implemented using a sampling rate appropriate for said corresponding technology type. Claim: 4. The method of claim 1, wherein said composite crest factor reduction block operates at a higher sampling rate than said individual crest factor reduction blocks. Claim: 5. The method of claim 1, wherein said one or more data samples are processed one or more of sample-by-sample and as a block of data samples. Claim: 6. A digital processor configured to perform multi-stage crest factor reduction, comprising: a memory; and at least one hardware device, coupled to the memory, operative to: apply one or more data samples associated with at least one channel of a first technology type to a first individual crest factor reduction algorithm; apply one or more data samples associated with at least one channel of a second technology type to a second individual crest factor reduction algorithm; aggregate outputs of said first and second individual crest factor reduction algorithms to generate an aggregated output; and apply said aggregated output to a composite crest factor reduction algorithm. Claim: 7. The digital processor of claim 6, wherein said technology type comprises one or more of Global System for Mobile Communications (GSM), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), Worldwide Interoperability for Microwave Access (WiMAX) and Long Term Evolution (LTE). Claim: 8. The digital processor of claim 6, wherein said individual crest factor reduction algorithms are implemented using a sampling rate appropriate for said corresponding technology type. Claim: 9. The digital processor of claim 6, wherein said composite crest factor reduction algorithm operates at a higher sampling rate than said individual crest factor reduction blocks. Claim: 10. The digital processor of claim 6, wherein said one or more data samples are processed one or more of sample-by-sample and as a block of data samples. Claim: 11. A multi-stage crest factor reduction block, comprising: a first individual crest factor reduction block for processing one or more data samples associated with at least one channel of a first technology type; a second individual crest factor reduction block for processing one or more data samples associated with at least one channel of a second technology type; a combiner for aggregating outputs of said first and second individual crest factor reduction blocks to generate an aggregated output; and a composite crest factor reduction block for processing said aggregated output. Claim: 12. The multi-stage crest factor reduction block of claim 11, wherein said technology type comprises one or more of Global System for Mobile Communications (GSM), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), Worldwide Interoperability for Microwave Access (WiMAX) and Long Term Evolution (LTE). Claim: 13. The multi-stage crest factor reduction block of claim 11, wherein said individual crest factor reduction blocks are implemented using a sampling rate appropriate for said corresponding technology type. Claim: 14. The multi-stage crest factor reduction block of claim 11, wherein said composite crest factor reduction block operates at a higher sampling rate than said individual crest factor reduction blocks. Claim: 15. The multi-stage crest factor reduction block of claim 11, wherein said one or more data samples are processed one or more of sample-by-sample and as a block of data samples. Current U.S. Class: 375/296 Current International Class: 04

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MULTI-STAGE CREST FACTOR REDUCTION (CFR) FOR MULTI-CHANNEL MULTI-STANDARD RADIO