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
Methods and systems for managing electronic messages
Methods and arrangements for realising betting with off-line terminal
Methods of isolating bipotent hepatic progenitor cells
Fabrication of high gradient insulators by stack compression
Nucleic acids for cloning and expressing multiprotein complexes
Method for using directing cells for specific stem/progenitor cell activation and differentiation
Method for facilitating assessment of a coursework answer and moderating the assessment
  Randomly Featured Patents
Vibration driven actuator
Advanced torque stability shoe shank
Methodology for deriving executable low-level structural descriptions and valid physical implementations of circuits and systems from high-level semantic specifications and descriptions thereo
Method for oxidizing precursor compounds of superconducting oxides
Printed circuit board plating process
Tongue cleaner
Hybrid plug-type connector with modular electrical and light waveguide connections
Faucet assembly
Thick pseudomorphic nitride epitaxial layers
Holder for a garage door remote control unit