Time synchronisation method, insensitive to power variations, associated receiver and computer program

A receiver for synchronising an input signal, the input signal carrying data frames and each data frame comprising a learning symbol formed of N repetitions of a learning sequence, the receiver comprising:

• circuitry configured to
• determine a total correlation signal by correlating the input signal with a correlation symbol formed of N repetitions of a correlation sequence corresponding to all or part of the learning sequence,
• determine a partial correlation signal by correlating the input signal with the correlation sequence,
• identify a peak of the total correlation signal at an instant tpct, called total correlation peak date,
• define at least one threshold from a power of the peak of the total correlation signal,
• compare a power of the partial correlation signal to the at least one threshold, and
• according to a result of comparing, validate a synchronisation and determine a start time of a first symbol following the learning symbol in a data frame from the total correlation peak date.

A non-transitory computer-readable storage medium including computer executable instructions, wherein the instructions, when executed by a computer, cause the computer to perform a method for synchronising an input signal, the input signal carrying data frames and each data frame comprising a learning symbol formed of N repetitions of a learning sequence, the method comprising:

• determining a total correlation signal by correlating the input signal with a correlation symbol formed of N repetitions of a correlation sequence corresponding to all or part of the learning sequence;
• determining a partial correlation signal by correlating the input signal with the correlation sequence;
• identifying a peak of the total correlation signal at an instant tpct, called total correlation peak date;
• defining at least one threshold from a power of the peak of the total correlation signal;
• comparing a power of the partial correlation signal to the at least one threshold;
• and
• according to a result of the comparing, validating a synchronisation and determining a start time of a first symbol following the learning symbol in a data frame from the total correlation peak date.