Method and apparatus for peak to average power ratio...

Details Method and apparatus for peak to average power ratio... Method and apparatus for peak to average power ratio...

2007-11-06

2007-11-06

Vo, Don N. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S346000

Reexamination Certificate

active

10455513

ABSTRACT:
A multi-stage signal processing method is provided that reduces the Peak to Average Power Ratio (PAPR) of an Orthogonal Frequency Division Multiplexed (OFDM) signal without increasing the bit error rate of the system. The multi-stage processing system apportions the tones into a number of types, and processes the tones in an order and by a process consistent with their determined type. Advantageously, preprocessing of the time domain signal may be used to condition the data tones for optimal PAPR reduction during the multi-stage process.

REFERENCES:
patent: 6366555 (2002-04-01), Gatherer et al.
patent: 6674810 (2004-01-01), Cheng
patent: 7136423 (2006-11-01), Duvaut et al.
patent: 2002/0176510 (2002-11-01), Laroia
patent: 2003/0189893 (2003-10-01), Richardson

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