Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2011-08-30
2011-08-30
Ha, Dac V (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
C455S114300
Reexamination Certificate
active
08009762
ABSTRACT:
The present invention is a method for calibrating a phase distortion compensated polar modulated RF transmitter, which uses amplitude pre-distortion to compensate for phase distortion, called AMPM compensation. Some embodiments of the present invention may include a method for calibrating polar modulated RF transmitters that use amplitude pre-distortion to compensate for amplitude non-linearities, called AMAM compensation. The AMPM and AMAM compensations may enable the polar modulated RF transmitter to conform to RF output power tolerances, meet EVM specifications, and meet ORFS requirements. The pre-distortion calibration methods may be used to determine calibration constants by measuring phase distortion and amplitude non-linearities. During normal operation, the calibration constants may be used to provide the AMPM and AMAM compensations.
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Al-Qaq Wael A.
Mahoney Dennis
Ha Dac V
Panwalkar Vineeta S
RF Micro Devices, Inc.
Withrow & Terranova, P.L.L.C.
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