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Acquisition method and apparatus for carrying out the method

  • US 7,133,438 B2
  • Filed: 01/22/2001
  • Issued: 11/07/2006
  • Est. Priority Date: 07/21/1998
  • Status: Expired due to Fees
First Claim
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1. A correlator for performing a communications acquisition, comprising:

  • a FIFO memory having a memory input and a memory output, said FIFO memory inputting and outputting a content;

    a shift register with feedback for holding a received signal sequence in serial form, said shift register having register positions connected in parallel to said memory input for parallel storage of a plurality of shift register contents read out in succession, said memory output being connected in parallel with said register positions for parallel transfer of data to said shift register;

    a further memory for holding reference signal sequences; and

    a comparator for comparing the content of said FIFO memory with a content of said further memory;

    the correlator programmed to perform the step of;

    correlating a binary-coded spread sequence arriving at a frequency f and having m bits with a locally generated spread sequence bystoring the received binary-coded spread sequence;

    splitting the stored received binary-coded spread sequence into k sections; and

    correlating the sections of the stored received binary-coded spread sequence at a frequency of k*f with corresponding sections of the locally generated spread sequence.

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