OFDM communications system employing crest factor reduction...

Details OFDM communications system employing crest factor reduction... OFDM communications system employing crest factor reduction...

2011-01-04

2011-01-04

Ghayour, Mohammad H (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C332S107000, C332S123000, C332S159000, C332S162000, C455S063100, C455S114200

Reexamination Certificate

active

07864874

ABSTRACT:
A system and method for providing a peak power reduced OFDM communications signal are disclosed. The system and method provide peak reduction processing in the time domain followed by inter-symbol interference (ISI) control processing in the frequency domain to maintain modulation errors introduced by the peak reduction processing to an acceptable level. The processing is preferably done on a parallel signal path and the peak corrections with ISI control are added into the main signal path to provide the peak reduced OFDM signal.

REFERENCES:
patent: 6175551 (2001-01-01), Awater et al.
patent: 2003/0086507 (2003-05-01), Kim et al.
patent: 2004/0090283 (2004-05-01), Naito
patent: 2004/0165524 (2004-08-01), Chen et al.
patent: 2005/0265479 (2005-12-01), Fujii et al.
patent: 2008/0019453 (2008-01-01), Zhao et al.
patent: 1 168 748 (2001-06-01), None
IEEE VTS 53rd Vehicular Technology Conference, Spring 2001 Proceedings, Jean Armstrong, “New OFDM Peak-to-Average Power Reduction Scheme”.

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