Peak power reduction using windowing and filtering

Details Peak power reduction using windowing and filtering Peak power reduction using windowing and filtering

2006-03-14

2006-03-14

Corsaro, Nick (Department: 2682)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S108000, C455S126000, C455S127100, C455S069000, C455S571000, C375S285000, C375S261000, C375S296000, C375S297000, C375S298000

Reexamination Certificate

active

07013161

ABSTRACT:
Large signal peaks (for example, peaks105and110) can dramatically increase the cost of a communications device by requiring high grade power amplifiers. Peak reduction can reduce the large peaks at a cost of increasing spurious emissions. A circuit (for example, circuit500) combining a scaling window peak reducing unit (for example, unit507) and a filter (for example, filter509) can effectively reduce the signal peaks without significantly increasing spurious emissions.

REFERENCES:
patent: 5287387 (1994-02-01), Birchler
patent: 5638403 (1997-06-01), Birchler et al.
patent: 5694431 (1997-12-01), McCoy
patent: 6236864 (2001-05-01), McGowan et al.
NEE, et al., “Reducing the Peak-To-Average Power Ratio of OFDM” VTC '98; pp 2072-2076; 1998 IEEE.

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