Resources Contact Us Home
OFDM pilot tone tracking for wireless LAN

Image Number 5 for United States Patent #7551677.

A pilot phase tracking loop for an OFDM receiver including a phase rotator receiving an incoming signal, a fast Fourier transform coupled to a phase rotator output, and a pilot phase error metric including a discrete Fourier transform portion coupled to the phase rotator output. The pilot phase error metric determines a phase error estimate associated with a received OFDM symbol, e.g., a data symbol, from the phase rotator output. A loop filter is coupled to the pilot phase error metric output and an oscillator is coupled to the loop filter output. The oscillator output is coupled to the phase rotator to adjust the phase of subsequent OFDM symbols of the incoming signal. Phase noise introduced by a radio portion of the OFDM receiver and OFDM transmitter is reduced by the baseband portion of the OFDM receiver improving OFDM signal tracking under poor SNR conditions.

  Recently Added Patents
Surfcraft fin
3D image generating method, 3D animation generating method, and both 3D image generating module and 3D animation generating module thereof
LED light
Personalized dashboard architecture for displaying data display applications
Method and apparatus for performing real time anomaly detection
Transcription factor
Synchronization of sound generated in binaural hearing system
  Randomly Featured Patents
Surf craft
Heat spreader with high heat flux and high thermal conductivity
Pneumatic booster
Device having a long-hair cutting unit
Receivers and methods for reducing interference in radio communications
CD modular frame
Carnation named Digisun
Programmatic discovery of common contacts
Glass fiber reinforced thermoplastic composition and process for its preparation
Connection system enabling the tightening torque of a screw terminal to be indicated