Resources Contact Us Home
Method for calibrating a phase distortion compensated polar modulated radio frequency transmitter

Image Number 10 for United States Patent #8009762.

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.

  Recently Added Patents
Methods and apparatus for low power out-of-band communications
Fine grain voltage scaling of back biasing
Method and apparatus for controlling cardiac resynchronization therapy using cardiac impedance
Method for manufacturing a substrate for a display device
Fishing apparatus
Method for installing industrial components in an environment
Chain link
  Randomly Featured Patents
Method of growing nitride semiconductor material
Refrigerating apparatus
Eraser having a sunburst
Disposable needle electrode with identification, and alterable, connector interface
Bio-hydraulic turbine testing system
Torodial continuous variable transmission
Amide dendrimer compositions
Biphenyl compounds and their use as oestrogenic agents
Verification supporting system
Information processing apparatus and information processing method