PROCESS AND DEVICE FOR CONVERTING DIGITALLY MODULATED HIGH-FREQUENCY RECEPTION SIGNALS

摘要

In a receiver for digitally modulated signals in mobile communication systems, the reception signal can be represented as a complex vector. The signal undergoes homodyne or heterodyne incoherent conversion in a mixing stage with mixers (M) in which it is decomposed into a real component and an imaginary component. The signal components are filtered by low-pass filters (TP) and digitized by analog/digital converters (AD). The scanned values are converted into the magnitude and direction of the vector. The magnitude (B) controls the amplification of the preliminary amplifier (VV) and of the low-pass filters (TP), and the reception data are derived from the difference between two consecutive values of the direction (W).