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
Multi-domain dynamic group virtual private networks
Vacuum cleaner
Irreversible thermochromic ink compositions
Performance metrics processing for anticipating unavailability
Anti-phishing system and method
Inter-carrier communications for multimedia-message delivery
Imaging apparatus having selection unit to select focus detection areas
  Randomly Featured Patents
Valve operator
Metal-making apparatus involving the smelting reduction of metallic oxides
Ultrasonic bonding apparatus for bonding a semiconductor device to a tab tape
Hat-type steel sheet pile
Sunless tanning compositions
Magneto-resistance effect type head and information reproducing apparatus
Hammock
Memory system
Access and follower control device for optical disk
Color wheel