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Method for the synchronization of a radio receiver, and adapted receiver for the implementation of said method

  • US 7,991,100 B2
  • Filed: 10/25/2005
  • Issued: 08/02/2011
  • Est. Priority Date: 10/27/2004
  • Status: Active Grant
First Claim
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1. A method of synchronizing a radio receiver suitable for receiving coded symbols in the form of radio pulses, each transmitted in a predetermined time slot within a respective frame, said slot being determined by a value selected from a set of ordered values forming a code stored in the receiver, the method comprising the following steps, performed within the receiver:

  • a—

    detecting received pulses;

    b—

    storing moments of reception of said pulses;

    c—

    associating a first value selected from the code with a first received pulse;

    d—

    selecting a second value from the code;

    e—

    estimating at least one moment of reception by combining the moment of reception stored for said first received pulse with said first and second selected code values;

    f—

    if the estimated moment matches the moment of reception stored for a second received pulse, validating the associations of said first and second code values with said first and second received pulses,otherwise repeating steps c to f by varying at least one of said first and second selected code values; and

    g—

    deducing, from at least one of the values of the code whose selection has been validated, a moment of transmission start for a symbol,wherein, in step f, the moment of reception estimated for a second received pulse matches the moment of reception stored for said second received pulse if an absolute value of a difference between the estimated and stored moments of reception for the second received pulse is less than a predetermined fraction of the duration of a time slot.

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