Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2007-04-03
2007-04-03
Patel, Jay K. (Department: 2611)
Pulse or digital communications
Receivers
Angle modulation
C375S344000
Reexamination Certificate
active
10353103
ABSTRACT:
Frequency offsets between a received carrier signal and a receiver's LO frequency are compensated by determining the offset and adjusting the phase of a demodulated signal derived from the modulated carrier. For frequency offsets that produce DC voltage offsets in I and Q components of the demodulated signal, the phase correction is implemented by operating upon the I and Q components with phase rotation operators in the form of sin θ and cos θ, where θ is an angle whose tangent is the result of dividing the Q by the I frequency offsets.
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Balboni Edmund J.
Fague Daniel E.
Liptay Thomas J.
Prendergast Colm J.
Analog Devices Inc.
Koppel, Patrick, Heybl & Dawson
Lugo David B.
Patel Jay K.
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