Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
OFDM pilot tone tracking for wireless LAN










Image Number 12 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
Cycloalkylamine substituted isoquinoline derivatives
Virtual links in a routed ethernet mesh network
Digital photographing apparatus and control method for evaluating validity of an auto-focus operation
Hydrogenolysis of ethyl acetate in alcohol separation processes
Receiving security risk feedback from linked contacts due to a user's system actions and behaviors
Compositions substantially free of sodium chloride and methods for the storage of red blood cells
Vehicle wheel
  Randomly Featured Patents
Crystal structures of neuropilin fragments and neuropilin-antibody complexes
Canine toothbrush
Hair clasp construction
Polishing slurry and polishing method
Instrument for comparing equal temperament and just intonation
Door trim
Swellable packer with variable quantity feed-throughs for lines
Edger and blade therefor
Methods employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables
Method and apparatus for generating a data sampling clock locked to a baud clock contained in a data signal