Pulse or digital communications – Synchronizers
Reexamination Certificate
2001-09-19
2010-11-02
Ghayour, Mohammad H (Department: 2611)
Pulse or digital communications
Synchronizers
C375S136000, C375S142000, C375S143000, C375S144000, C375S145000, C375S147000, C375S148000, C375S149000, C375S150000, C375S316000, C375S365000, C375S366000, C375S367000, C375S368000
Reexamination Certificate
active
07826577
ABSTRACT:
A method is provided for frequency acquisition, particularly for initial frequency acquisition, pursuant to a known synchronization sequence for synchronizing a mobile communications device having a local oscillator with previously known transmit frequencies of a base station that transmit in a known channel raster with defined frequency points within a band, wherein the method includes the steps of determining the inband power of the known synchronization sequence via a sensor by scanning a frequency band, performing coarse determination of the local power maximum of the inband power and, thus, of the received carrier frequency over the scanned frequency band, producing a presumed channel frequency at which the base station is transmitting on the basis of knowledge of the channel raster of the transmit frequencies of the base station, performing fine determination of the received carrier frequency by comparison with the known synchronization sequence, and correcting the frequency deviation of the local oscillator from the transmitted carrier frequency.
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Peter Smolka, “GSM-Funkschnittstelle, Elemente and Funktionen”, telekom praxis Heft 4, 1'993, pp. 17-24.
Bienek Bernd
Falkenberg Andreas
Karger Stephan
Kreul Theo
Kunz Albrecht
Ghayour Mohammad H
K&L Gates LLP
Palm Inc.
Vlahos Sophia
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