Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Method and system for the geolocation of a radio beacon in a search and rescue system
Positive electrode for secondary battery, and secondary battery
Systems and methods for building axes, co-axes and paleo-geographic coordinates related to a stratified geological volume
Polarity switching member of dot inversion system
Method for producing lactamates by way of thin film evaporation
Multi-user remote health monitoring system with biometrics support
Organic electroluminescence device
  Randomly Featured Patents
Regulator for gas and air mixture
Operational control device for two-cycle engines
Cell culture process
Sensor coil pattern and the coordinate input apparatus thereof
Displacement chromatography of proteins using low molecular weight displacers
Cannula including a valve structure and associated instrument elements
Silver halide photographic material
Optical cable for telecommunications
Camera having vibration correcting function
Heat activatable adhesive composition and adhesive sheet having adhesive layer thereof