Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus to compensate AM-PM delay mismatch in envelope restoration transmitter










Image Number 6 for United States Patent #7453927.

An RF transceiver includes an Envelope Restoration (ER) transmitter (TX) and a receiver (RX). A method includes providing the TX with a programmable delay element in at least one of an AM path and a PM path; making an RF connection between an output of the TX and an input of the RX; and when receiving a signal through the RF connection, determining a delay value for use in programming the programmable delay element. The method includes measuring an effect on a parameter of a delay mismatch between the AM path and the PM path for use in determining the delay value. Adjacent Channel Leakage Ratio (ACLR); Own-Channel Power (OCP) or Bit Error Ratio (BER) may be measured in this regard. When measuring ACLR, delay is adjusted to minimize ACLR; when measuring OCP, delay is adjusted to maximize OCP; and when measuring BER, delay is adjusted to minimize BER.








 
 
  Recently Added Patents
Optical scanner and image-forming device
Alkaline battery
Method and system for associating a cell-sector with time-dependent location parameters
Device for increasing chip testing efficiency and method thereof
Particles with high surface charge for crystalline colloidal arrays
Vehicle exterior
Authenticated secret sharing
  Randomly Featured Patents
Graphical user interface with method and apparatus for interfacing to remote devices
Transparent polycarbonate polyester composition and process
Blind cutting machine
Method and system for optimizing audio imaging in an automotive listening environment
Container for packaging and unwinding a coil of wire
Image forming apparatus having a force-converting mechanism to detach a rotary body
Method of producing rough strains of bacteria and uses thereof
System and method to control communication of data
Methods, systems, and products for electronic purchases
Manufacture of factor H (FH) and FH-derivatives from plasma