Pulse or digital communications – Synchronizers
Reexamination Certificate
2006-08-29
2006-08-29
Patel, Jay K. (Department: 2637)
Pulse or digital communications
Synchronizers
C375S256000, C375S259000
Reexamination Certificate
active
07099422
ABSTRACT:
A method and apparatus of initial synchronization, or acquisition, of time modulated ultra-wideband (UWB) communications uses a transmitted-reference preamble. The method and apparatus require that the transmitter first send a time-reference, delay-hopped (TR/DH) burst; such a burst is easily detected and can be processed to provide a time mark accurate to within a few nanoseconds. Following the transmission of the TR/DH burst, the transmitter waits a fixed period of time, the duration of which is known to the receiver, and then the transmitter sends a burst of pulse position modulation, time hopped (PPM/TH) or other time modulated UWB. After the reception of the first burst, the receiver can estimate the time of reception of the second burst to the accuracy of the time mark.
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Hladik Stephen Michael
Hoctor Ralph Thomas
Fletcher Yoder
General Electric Company
Patel Jay K.
Vlahos Sophia
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