Tracking system for vehicle-mounted antenna

Details Tracking system for vehicle-mounted antenna Tracking system for vehicle-mounted antenna

1995-01-24

1996-05-28

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including antenna orientation

H01Q 300

Patent

active

055216048

ABSTRACT:
In a vehicle-mounted antenna tracking system, a bearing error between the bearing angle of the antenna and the direction of arrival of a signal from a satellite, the bearing angle of the antenna, and a vehicle attitude is detected and summed together to produce a satellite position signal. The vehicle attitude and the antenna's bearing angle are summed together to produce an absolute antenna bearing signal. If the antenna is in line of sight to the satellite, the satellite position signal is stored into a memory and the bearing error signal is applied through a filter circuit to an antenna drive system so that the antenna's bearing is controlled to reduce the bearing error to a minimum. If the antenna is not in line of sight to the satellite, the stored signal is read out of the memory and a pseudo-error signal is produced by taking the difference between the signal from the memory and the absolute antenna bearing signal, and applied through the filter circuit to the antenna drive. The filter circuit comprises an autoregressive filter and an integrator whose outputs are combined in an adder.

REFERENCES:
patent: 5241319 (1993-08-01), Shimizu

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