Pulse or digital communications – Transmitters – Angle modulation
Reexamination Certificate
2006-10-17
2006-10-17
Ha, Dac V. (Department: 2611)
Pulse or digital communications
Transmitters
Angle modulation
C375S272000, C375S274000, C375S295000, C375S296000, C375S305000, C455S043000, C455S063300, C455S067150, C455S113000, C455S115200, C455S126000, C332S126000, C332S127000, C332S162000
Reexamination Certificate
active
07123665
ABSTRACT:
A method and apparatus for generating a burst FSK signal having precisely shaped transitions between modulation states. The apparatus uses feedforward compensation of phase gain and phase preemphasis coefficients for compensating the frequency conversion gain of the apparatus, and the phase gain coefficient is used for stabilizing a frequency synthesis loop. The phase gain and preemphasis coefficients are determined in a calibration within the time constraints of on-line signal bursts based upon measured phase errors and accelerated predicted phase gain and preemphasis phase errors.
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Daniel R. McMahill & Charles G. Sodini, “Automatic Calibration of Modulated Frequency Synthesizers”, IEEE Transactions On Circuits and Systems—II: Analog and Digital Signal Processing, vol. 49, No. 5, pp. 301-311, May 2002.
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Brown James E. C.
Rothenberg Bret
Brady W. James
Ha Dac V.
Shaw Steven A.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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