Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2006-07-11
2006-07-11
Nguyen, Simon (Department: 2685)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C455S067110, C455S226100, C455S295000, C370S503000, C375S149000
Reexamination Certificate
active
07075948
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.
Nguyen Simon
STMicroelectronics Inc.
Szuwalski Andrew M.
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