Resources Contact Us Home
FFT-size detection and cell search for a cellular communication system

Image Number 5 for United States Patent #8116806.

An apparatus and method for cell acquisition and downlink synchronization acquisition in an OFDMA wireless communication system are provided. In an SS apparatus in a broadband wireless communication system, a preamble subcarrier acquirer extracts subcarrier values having a preamble code from an FFT signal. A multiplier code-demodulates the subcarrier values by multiplying the subcarrier values by a preamble code. A correlator calculates a plurality of differential correlations in the code-demodulated signal. An IFFT processor IFFT-processes the differential correlations by mapping the differential correlations to subcarriers. A maximum value detector detects a maximum value from the IFFT signal and calculates a timing offset using an IFFT output index having the maximum value.

  Recently Added Patents
Image enhancement based on multiple frames and motion estimation
Medical device arm
Methods and apparatuses for configuring and operating graphics processing units
Lid for a container
Nonvolatile semiconductor storage device having conductive and insulative charge storage films
Electronic component and reflected-wave cancelling method
Interferer region identification using image processing
  Randomly Featured Patents
Crosslinking outer layer and process for preparing the same
One-piece pushbutton dispensing cap for pressurized container
Phase meter using a permuter and matched filter
Portable alarm
Adjustable sensor for safety belt retractor
Mowing machine having disk blade cutters
Luminaire reflector mounting for rotation of asymmetric reflector
Polarizing beam splitter and method for manufacturing same
Window-containing assemblies having a molded plastic frame
Automobile ventilator