Telecommunications – Receiver or analog modulated signal frequency converter
Reexamination Certificate
2006-06-29
2008-09-30
Nguyen, Simon D (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
C455S067130, C455S226100, C455S296000, C375S325000, C375S329000
Reexamination Certificate
active
07430402
ABSTRACT:
Counter-clockwise and clockwise quadrant transitions are detected and accumulated with respect to a received complex signal over a certain time period. These transitions may then be compared in order to obtain information indicative of both a magnitude and phase of a frequency offset error. Additionally, zero-crossings of the received complex signal over the same certain time period are detected and accumulated. The accumulated crossings provide information indicative of frequency offset magnitude. The determined magnitude and phase of the frequency offset error may then be used to adjust a local oscillator frequency to provide for improved receiver performance.
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Jorgenson Lisa K.
Kubida William J.
Nguyen Simon D
STMicroelectronics Inc.
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