Didon digital demodulator

摘要

A DIDON Digital demodulator includes an input analog-to-digital conversion device which supplies n samples (n being at least equal to 4) during a DIDON period, and an identification device which involves shifts at the sampling frequency in order to search and detect groups of n successive samples which are probably representative of DIDON signals. The probability criteria are a function of the structure of the group under study and of the nature of the DIDON signal which said group may represent in comparison with the nature of the DIDON signal represented by the group which precedes this signal by a DIDON period. The identification device outputs a configuration probability signal and a configuration signal. The configuration signal is received by a data regenerating circuit which then regenerates a data signal and a clock signal when the identification device determines that the configurations are probably DIDON signals.