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
Terminal box assembly
Hoists
Representations of compressed video
SRAM cells using shared gate electrode configuration
Randomly accessible visual information recording medium and recording method, and reproducing device and reproducing method
Maintenance guidance display device, maintenance guidance display method, and maintenance guidance display program
Method for adapting a contact point of a clutch in a drivetrain of a motor vehicle
  Randomly Featured Patents
Mail thickness measuring apparatus
Method for treating flax fibre
High speed power factor controller
Solid state power controller with power switch protection apparatus
Bulk backfill in situ liner for hard rock environment
System and method for recording and displaying a graphical path in a video game
CMOS structures and processes based on selective thinning
Receptacle connector
Device for handling objects, for example hygienic and sanitary articles
Computer-based method and apparatus for verifying an electronic voting process