Pulse or digital communications – Receivers – Angle modulation
Patent
1996-04-18
1999-08-03
Chin, Stephen
Pulse or digital communications
Receivers
Angle modulation
375326, 375344, 375329, 329304, 348607, 348726, H04L 2722, H04L 2714
Patent
active
059334606
ABSTRACT:
A phase detecting method and associated apparatus for use in a digital vestigial sideband modulation communication device. The phase detecting method has the steps of: digital-filtering I channel data applied from the exterior to restore Q channel data; compensating for a phase of the I and Q channel data by a prescribed phase error value; estimating an I channel level value which approximates the I channel data from the phase-compensated I channel data; and obtaining a difference between the phase-compensated I channel data and the estimated I channel level value, and generating as the phase error value an operation value obtained by multiplying the difference by a sign of the Q channel data.
REFERENCES:
patent: 5406587 (1995-04-01), Horwitz et al.
patent: 5533070 (1996-07-01), Krishnamurthy et al.
patent: 5533071 (1996-07-01), Krishnamurthy et al.
patent: 5602601 (1997-02-01), Kim et al.
patent: 5796786 (1998-08-01), Lee
Chin Stephen
Deppe Betsy L.
Samsung Electronics Co,. Ltd.
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