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
Removable case
Nozzle
Flame-retardant polyamide composition
Paper product with surface pattern
Using storage cells to perform computation
Wireless communication system
Method for transferring inventory between virtual universes
  Randomly Featured Patents
Tetrahydropyridoquinolone derivatives useful as anxiolytic agents
Polythioetheralkyleneoxide epoxides
Output port determining apparatus
Method and apparatus for aerosol particle absorption spectroscopy
System for selling, buying, lending, and renting virtual region and method thereof
Fast-turnoff photodiodes with switched-gain preamplifiers in photoplethysmographic measurement instruments
Method for constructing holograms
Gate valve
Capacitor, method of producing the same, semiconductor device, and liquid crystal display device
Adjustable drive chain saw woodworking machine