Method and arrangement for an alternative signal path in a navigation transmitter
AssigneeEADS Deutschland GmbH
InventorHans Dodel
Life of this patent
Estimating the term…
Abstract
Navigation signals emitted by a navigation transmitter (46), in a first signal path (41), have a time reference generated and, based on this time reference, navigation signals are generated which are subsequently emitted by way of a transmitting device (39, 40). In the event of interferences in the first signal path (41), a switch-over takes place to a second signal path (45) parallel to the first signal path (41). The navigation transmitter (46) receives time reference signals and/or navigation signals, and the received signals are guided by way of the second signal path (45) to the transmitting device (39, 40) and emitted.
Claims20
Navigation satellite system comprising:
- at least one receiving device for receiving at least control signals;
- a transmitting device for emitting navigation signals;
- a first signal path circuit between the receiving device and the transmitting device, said first signal path circuit including a signal generating device for generating navigation signals and a time reference device which is connected with the signal generating device,
- a second signal path circuit provided parallel to the first signal path circuit while bypassing the signal generating device and the time reference device;
- and
- at least one change-over device that connects one of the first signal path circuit and the second signal path circuit with the receiving device and the transmitting device based on whether navigation and/or time reference signals can no longer be generated by the first signal path circuit or can only be generated in a faulty manner.
Method of emitting navigation signals by a navigation transmitter comprising the steps:
- generating a time reference in a first signal path;
- generating navigation signals in said first signal path as a function of said time reference which are subsequently emitted by a transmitting device;
- switching over in the event of interferences in the first signal path to a second signal path parallel to the first signal path wherein when the navigation transmitter receives at least one of time reference signals and navigation signals, the received signals are guided by way of the second signal path to the transmitting device and are emitted.
A navigation satellite system comprising:
- a receiving device;
- a transmitting device;
- a first signal circuit connected between the receiving device and the transmitting device;
- a second signal circuit connected between the receiving device and the transmitting device in parallel with the first signal circuit;
- a control device which when receiving first input signal as control signals outputs said control signals to said first signal circuit for transmission to said transmitting device and wherein said first signal circuit converts said control signals to at least one of navigation signals and time reference signals and, when said control device receives at least one of navigation and time reference signals said control device outputs said at least one of navigation and time reference signals to said transmitter through said second signal circuit.
Dependencies are inferred from the claim text.