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
Methods and systems for sending messages regarding an emergency that occurred at a facility
Systems and methods for detailed error reporting in data storage systems
Locking flange
Automated difference recognition between speaking sounds and music
Generating agricultural information products using remote sensing
Image quality assessment
Methods and apparatus for achieving multiple bit rates in passive optical networks
  Randomly Featured Patents
Stabile invert fuel emulsion compositions and method of making
Thermal recording head
Application and database security and integrity system and method
Method for producing high efficiency light-emitting diodes and resulting diode structures
Memory load balancing for single stream multicast
Container for video and sound recording media
Refrigerator and guide member that guides discharge of defrost water
Apparatus for holding mould side portions in a glassware forming machine
Method and device for the measurement of wind-related stresses on a rotating system
Data transfer scheme using caching and differential compression techniques for reducing network load