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

Image Number 6 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
Printed circuit board including electromagnetic bandgap structure
Retransmission control method, base station and mobile station
Method for producing organo-oligo silsesquioxanes
Cathode material for lithium ion secondary battery and lithium ion secondary battery using it
Pyrrolidine derivatives, pharmaceutical compositions containing the same, and methods of using the same
Analog to digital converter with increased sub-range resolution
  Randomly Featured Patents
Adaptive sectorization in a spread spectrum communication system
Mounting a high pressure turbine nozzle in leaktight manner to one end of a combustion chamber in a gas turbine
Large scale integrated package structure
Piston valve with proportional solenoid controlled pilot valve
High speed network switch
Device for producing a block-built picture
Surface modifications for rotary drill bits
Pomice containing composition
Lubricant control in disc drive
Polymer compound for biomedical use and biochip substrate using such a polymer compound