Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2007-12-25
2007-12-25
Payne, David C. (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
C375S295000, C375S301000
Reexamination Certificate
active
10096460
ABSTRACT:
A transmit path correction system (34) for compensating for digital DC offsets, I/Q gain imbalances and I/Q phase imbalances includes a mixed signal forward path (36) and a mixed signal feedback path (38). The forward pat (36), which is operable to process input data symbols to produce at least one analog output signal, preferably includes a digital DC offset correction circuit (86) for compensating for digital DC offsets in the forward path (36) using at least one digital feedback signal (82, 84), an I/Q phase equalization circuit (90) for compensating for the I/Q phase imbalances in the forward path (36), and an I/Q gain equalization circuit (88) for compensating for the I/Q gain imbalances in the forward path (36) using the digital feedback signal(s) (82, 84). The feedback pat (38) processes the analog output of the forward path (36) to produce the digital feedback signal(s) (82, 84).
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Rahman Mahibur
Talwalkar Sumit Anil
Zocher Andrew Gerald
Brinkley, Morgan et al.
Chen Sylvia
Karpinia Randi L.
Motorola Inc.
Payne David C.
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