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

Image Number 8 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
Elastic polypropylene-based film compositions
Isothermal amplification of DNA
Software execution management apparatus, method, and computer-readable medium thereof
Protecting a gaming machine from rogue code
Emergency power-off button with proximity alarm
Supply voltage generating circuit and semiconductor device having the same
Image processing unit, image processing method and program
  Randomly Featured Patents
Disk changer
Stretcher mounting unit
Combination wheel retainer and axle shaft cover
Semiconductor manufacturing method and semiconductor device manufacturing apparatus
Mast mounted omnidirectional phase/phase direction-finding antenna system
Address selection for an I2C bus
Sewing machine
Image forming device
Method and system for virtual representation of currency
Descaling system for the cooling water tubes of a steam condenser