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
Stool
Display apparatus having a semi-penetration layer and a sealing unit
Substrate processing apparatus and display method of substrate processing apparatus
Active constant power supply apparatus
Coated article and method for making the same
Configurable memory controller/memory module communication system
Semiconductor device
  Randomly Featured Patents
Log splitting attachment for tractor three point hitch members
Prosthetic element for the treatment of inguinal hernias, in particular by the celioscopic route
High power fiber isolator
Metering fluid sprinkling container
Method and apparatus for endpoint detection for chemical mechanical polishing using electrical lapping
Portable file case holder with removable wheels and stackable compartments
Biodegradable magnetic microclusters and methods for making them
Pattern formation methods combining light lithography and electron-beam lithography and manufacturing methods using the same
Multicolored fabric printing ribbon including nonbleeding, nonmigrating flushed pigment
Screening methods for compounds useful in the regulation of cell proliferation