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
Method and apparatus for controlling cardiac resynchronization therapy using cardiac impedance
Method and system for physical verification using network segment current
Optoelectronic semiconductor chip and method for manufacturing a contact structure for such a chip
Train car for proppant containers
Plasma doping method and plasma doping apparatus
Method of and apparatus for image denoising
Collaborative computing community role mapping system and method
  Randomly Featured Patents
Nanoparticles biosensor
Apparatus for the manufacture of nonwoven webs and laminates
Accumulator
Simple high tension capacitor
Device for simultaneous creation and detection of markings
Copper phthalocyanine dyestuffs and their use
Respirator mask
Inbred corn line GS05-32431
Method and device for the qualitative and/or quantitative analysis of a protein and/or peptide pattern of a liquid sample that is derived from the human or animal body
Quadrature modulator with integrated distributed RC filters