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
Apparatus and methods for providing efficient space-time structures for preambles, pilots and data for multi-input, multi-output communications systems
Lifting apparatus
Methods and systems for improved engine speed control during engine starting
Pose-variant face recognition using multiscale local descriptors
Approaching object detection system
Quantum dot template for fast and simultaneous detection of different infectious agents
  Randomly Featured Patents
Method for carrying out a high-pressure start of an internal combustion engine, control facility and internal combustion engine
Catharanthus plant named `Sunnichiroin`
Apparatus and methods for controlling the transmission of messages
Preparation of aryl-substituted aliphatic carboxylic acid esters by catalytic carbonylation
Footwear sole
Systems and methods of inventory management utilizing unattended facilities
Test chip for semiconductor fault analysis
Fishing lure
Rapid cooking oven with broadband communication capability to increase ease of use