Two-channel satellite navigational system - has in each channel series circuit of extrapolator and changeover switch, one with input coupled to phase detector output

摘要

The system contains a radio device for receiving and processing of signals from a navigation satellite. It is of two-channel type, each channel (1, 2) containing a mixer (4) whose input (3) receives the signal of a navigation satellite frequency. The output of the mixer is coupled to the input (5) of a phase detector (8). Each channel contains also a series circuit of an extrapolator (12) and a change-over switch (14). The output of the phase detector is connected to an input (11) of the extrapolator and to a second input (13) of the change-over switch, whose output is connected to an input (16) of a controlled since generator (17). The second input (32) of the extrapolator and the third input (33) of the change-over switch are connected to an output of the level analyser (27) for the signal from the satellite. The navigational satellite system is pref. used for detecting and positioning of a stationary or mobile object on the earth surface.