Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2004-10-27
2009-11-24
Deppe, Betsy L (Department: 2611)
Pulse or digital communications
Receivers
Angle modulation
C375S235000, C375S322000, C375S350000
Reexamination Certificate
active
07623595
ABSTRACT:
Methods and systems for filtering an input signal include receiving a first demodulated signal produced by multiplying a first generated signal with a received input signal, receiving a second demodulated signal produced by multiplying a second generated signal with the received input signal, and producing first and second filtered output signals by applying a transfer function to the first and second demodulated signals, wherein the transfer function comprises a first filtering coefficient, wherein the first filtering coefficient defines a matrix comprising one or more non-symmetrical terms. An application of the transfer function can compensate for one or more of an amplitude mismatch between the first and second generated signals, a phase mismatch between the first and second generated signals, and one or more frequency handling characteristics of channels used to produce the first and second demodulated signals.
REFERENCES:
patent: 6785529 (2004-08-01), Ciccarelli et al.
patent: 7024172 (2006-04-01), Murphy et al.
patent: 7061994 (2006-06-01), Li et al.
IEEE Computer Society, “IEEE Standard for Information Technology—Telecommunications and Information Exchange Between Systems—Local and Metropolitan Area Networks—Specific Requirements—Part 3: Carrier Sense Multiple Access with Collision Detection(CSMA/CD)Access Method and Physical Layer Specifications”, IEEE Std 802.3—2002.
Deppe Betsy L
Marvell International Ltd.
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