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

Image Number 6 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
Credit flow control scheme in a router with flexible link widths utilizing minimal storage
Article based on a composition containing a crosslinked blend of elastomers
Implantable defibrillator systems and methods with mitigations for saturation avoidance and accommodation
Method and system for a low-power client in a wide area network
Braided pull tug pet toy
Packet bundling at the PDCP layer
  Randomly Featured Patents
Power interrupt test equipment
Feed auger attachment
Corrugated strip tray
Insulated heat shield
Anti-human tenascin monoclonal antibody
Container with expandable side walls and method
System and method for communicating system management information during network interface teaming
Cultivator for aerating a ground surface
System using electric furnace exhaust gas to preheat scrap for steelmaking
Freeze-proof hydrant