Method and apparatus, which allow it to a modem, to a transmitter of digital data via a radio channel in the presence of noise sources to synchronize

摘要

& br / (see appended drawing in bopi) & br / & & br / signals received from the transmitter on a set of n sensors, & br / (see appended drawing in bopi) & br / & & br / sensors and a signal replica of (k) is known, to calculate a criterion of synchronization (15) by carrying out the products of the vectors of intercorrelation br / (see appended drawing in bopi) & br / & & br / determined in order to place the synchronization on the sample to which the value of the criteria exceeds the threshold value η. In order to estimate the doppler shift, the synchronization sequence is cut into slices of a determined number of symbols in order to perform calculations of the fast fourier transform of intercorrelation vectors determined in each slice. The application: radio transmission of data.