Method for detecting an interfering signal for a digital data demodulator and apparatus for the implementation of such a method.

摘要

The invention relates to a method of detecting an interfering signal for a digital data demodulator, in which this signal detection takes place with regard to the modulated signal transposed into baseband by virtue of the periodic insertion of known signals and by means of delaying the signals received by a guard time fixed prior to demodulation; the said method comprising: … …  - a step of estimating the square of the coefficient of cross-correlation between the reference signal received and the expected signal at a specified instant at which the reference signal is assumed to be present; …  - a step of estimating the square of the correlation of the signal received at the same instant, of multiplying by a coefficient which represents the square of the threshold of the estimate of the correlation coefficient and of multiplying by the number of reference symbols used in a reference burst; …  - a step of comparing against one another the quantities obtained simultaneously during the two preceding steps. … …The invention also relates to a device for implementing this method. …Application in particular to the field of digital radiowave links. ……