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
Linerless labels
Buildable dinnerware
Adaptive switch mode LED system
Radio communication system, base station device and mobile station device utilizing an intermittent reception
Configuration method and system of complex network and configuration and management module of server resources
Photoacoustic joulemeter utilizing beam deflection technique
Linked area parameter adjustment for spinal cord stimulation and associated systems and methods
  Randomly Featured Patents
Method of translating free-format data records into a normalized format based on weighted attribute variants
Method of treating subterranean formations to enhance hydrocarbon production using proppants
Advertising display device for newspapers and analogous articles
Single layer thin film transistor static random access memory cell
Portable temperature and pulse monitor
Paint ball land mine
Plasma display panel including a chassis base with a reinforcing member
Skier alert system
Portable communication apparatus
Self-aligned retaining clip for automotive components