Pulse or digital communications – Transmitters
Reexamination Certificate
2007-09-11
2007-09-11
Bocure, Tesfladet (Department: 2611)
Pulse or digital communications
Transmitters
C375S213000
Reexamination Certificate
active
11171592
ABSTRACT:
Systems and methods for transmitting information at very high data rates through narrowband communication channels are provided. The systems and methods involve modulating a message signal with a novel return-to-zero, abrupt phase modulation technique and filtering the modulated signal with a sophisticated high-precision digital filter. The digital filter is designed based on fractal modeling of the frequency spectrum of the modulated signal. The systems and methods of the present invention enable data rates exceeding 5 Mbps to be delivered through frequency channels as narrow as 50 KHz under a variety of channel conditions.
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Kluesing Alvin Dale
Manapragada Sai C.
Bocure Tesfladet
Morgan & Lewis & Bockius, LLP
Photron Research and Development PTE Ltd.
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