Method and device for the demodulation of a carrier wave modulated in phase by a wave in - carrier which is modulated in the following phase of the base band signals

摘要

The invention relates to a method of the demodulation of a carrier wave modulated in phase by a wave in - carrier which is modulated in the following phase of the signals in baseband. / p & & p & the technical problem posed is that of reduce the degradation of the signal, and, consequently, the power of the dimensions of the reception antenna. / p & & p & according to the invention, firstly, a change of frequency has a lower intermediate frequency f is that of the carrier wave, it performs a demodulation in phase in order to extract the wave in - carrier using a costas loop, a sampling, 1984, the signal demodulates in a costas loop has a frequency twice the intermediate frequency f and regenerated the clock frequency f of the binary elements in a phase lock loop of the first order, by using the frequency of the wave in - carrier as frequency reference. / p & & p & the invention applies in particular, to the transmission of data between a spacecraft and a ground station and