Frequency offset quantity detecting apparatus

Details Frequency offset quantity detecting apparatus Frequency offset quantity detecting apparatus

2005-11-15

2005-11-15

Chin, Stephen (Department: 2634)

Pulse or digital communications

Receivers

Automatic frequency control

C375S330000, C329S304000

Reexamination Certificate

active

06965654

ABSTRACT:
A frequency offset may be determined by detecting phase information for both a one-symbol difference and a two-symbol difference of a received known signal. Half a value representing the phase information detected for the two-symbol difference is averaged, for a particular interval, with a value representing the phase information detected for the one-symbol difference. The frequency offset is determined from the average.

REFERENCES:
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PCT International Search Report dated Oct. 17, 2000.
Hiroshi Kubo, “A Multiple Open-Loop AFC for MPSK.” Technical Research Report of IEICE, SANE 95-114, SAT 95-92, 1996, pp. 25-32, with English abstract.

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