Apparatus and method for performing initial cell search in wireless communication systems

  • US 20050221848A1
  • Filed: 05/16/2005
  • Published: 10/06/2005
  • Est. Priority Date: 06/22/2001
  • Status: Abandoned Application
First Claim
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1. A user equipment (UE) configured to perform initial cell search in a wireless communication system having a plurality of base stations, each base station transmitting a common primary synchronization code (PSC) in a primary synchronization channel in conjunction with a base station specific secondary synchronization code (SSC) at a different time within a system frame, said UE receiving an input signal including the PSC and SSC from at least one of the base stations;

  • said UE comprising;

    a step one processor for detecting PSCs within a selected time frame in said received input signal and determining a maximum PSC location, which corresponds to the maximum PSC value detected within the frame, and producing an output complex correlation value;

    a cancellation device for subtracting the PSC value at the maximum PSC location within the frame to enhance detection of the SSC;

    a step two processor, coupled to the step one processor and the cancellation device, configured to determine a scrambling code group number for the cell and a frame timing offset value for locating the frame boundary; and

    a step three processor, coupled to the step two processor, configured to determine the scrambling code of the cell.

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