Process and device for converting digitally modulate high-frequency reception signals

A method of converting a digitally modulated reception signal from a radio-frequency range, comprising the steps of:

• converting the reception signal, which can be represented as a complex vector, incoherently into a baseband, the reception signal being split into a real component and an imaginary component, continuous in time and amplitude, a phase difference per bit period due to the incoherent conversion being kept to less than half a phase shift caused by a modulation per bit, the real and imaginary components being subsequently amplified, filtered and sampled, a sampling time being determined within a preceding synchronization time, the sampled real and imaginary components being subsequently digitized thereby providing sampled values that are value-converted as a pair of binary numbers for magnitude value and angle value of the vector, using the magnitude value to adjust a level of the real and imaginary components in the step of amplifying, filtering and sampling the real and imaginary components, the magnitude value serving for gain control thereof;
• and recovering reception data from a difference between two successive angle values of respectively two successive sample times after a classification, dependent on a selected modulation method, of the magnitude of the difference between said two successive angle values.