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
Analog to digital converter with increased sub-range resolution
Mass spectrometry method
Multiple carrier compression scheme
Error protection for pipeline resources
Chain link
Apparatus, method and program for image receipt, processing, conversion, and delivery to and from a plurality of external apparatuses
  Randomly Featured Patents
MR imaging method and apparatus
Percutaneous fixation of hollow organs
Thermal nasal dilator and method of treatment for relief of nasal congestion and other symptoms associated with common cold and allergies
Sealed antifriction bearing with sealing element
Mini case erector
Exhaust system for combustion-powered fastener-driving tool
Compensation for radar path length variation and phase error
Ophthalmic roughing wheel
Part-load control in a split-cycle engine
Method and apparatus for combining CT scanner system detector outputs