DEVICE FOR COMPENSATING IN A RADIOFREQUENCY RECEPTOR OF THE DOPPLER EFFECT PRODUCED BY THE RELATIVE MOTION OF A RECEIVER IN RELATION TO A TRANSMITTER ACCORDED ON THE SAME FREQUENCY

摘要

THE DEVICE IS INSERTED INTO THE DEMODULATION CHANNELS OF RECEIVERS COMPOSED BY A FREQUENCY MIXER 6 EXCITED BY A LOCAL OSCILLATOR 7 AND A CARRIER LOCKED LOOP 8. IT INCLUDES MEANS 12, 17 FOR ADDING THE DOPPLER FREQUENCY TO THE D FREQUENCY TUNING OF THE LOCAL OSCILLATOR 7 AND TO THE TUNING FREQUENCY OF THE CARRIER LOCKING LOOP 8. A FILTER 9 IS INSERTED INTO THE CARRIER LOCKING LOOP 8 TO COMPENSATE FOR THE DELAY INTRODUCED BY A COUPLED INTERMEDIATE FILTER 9 AT THE OUTPUT OF THE FREQUENCY MIXER 6. /P P APPLICATION: TELECOMMUNICATION RECEIVER.