Measurement method for analysing the propagation of eletromagnetic navigation signals

Abstract

A measuring method for analyzing the propagation of electromagnetic navigation signals, wherein at least one representative transmitting unit, having a chronological signal feed scheme unambiguously assigned to the navigation signal, is assigned to each of the navigation signals. The representative transmitting units are at least intermittently operated offset in time. A characteristic transmission-free leader pause duration and transmission-free trailer pause duration or a characteristic transmitting duration is assigned to each representative transmitting unit. An analysis unit is coupled to a receiving unit and a time-dependent amplitude detection is carried out, wherein the time curve of the received amplitude values is analyzed by the analysis unit to assign the representative transmitting unit to timeslots of the received amplitude values. The pause durations and/or the transmitting durations in the time curve are analyzed and the origin transmitting units of the signal are ascertained on the basis of these items of information.

The invention claimed is: 
     
       1. A measuring method for analyzing the propagation of components of electromagnetic navigation signals,
 wherein at least one representative transmitting unit is assigned to each navigation signal component, resulting in a plurality of transmitting units, 
 wherein an analysis unit is coupled to a receiving unit and carries out an amplitude detection at a first frequency, characterized in that the multiple representative transmitting units are operated offset in time without time overlap, 
 wherein every representative transmitting unit of the plurality of transmitting units is assigned a characteristic transmission-free leader pause duration and/or transmission-free trailer pause duration for each of its assigned navigation signal components, which is respectively maintained between operating phases of the representative transmitting units, 
 wherein the analysis unit carries out a time-dependent amplitude detection, 
 wherein a time curve of received amplitude values is analyzed by the analysis unit to assign the representative transmitting unit and the assigned navigation signal components to timeslots of the received amplitude values, in that the pause durations in the time curve of the amplitude values are assigned to the leader pause durations and/or trailer pause durations of the representative transmitting unit. 
 
     
     
       2. The measuring method according to  claim 1  , wherein the propagation of the electromagnetic navigation signal components is analyzed with the aid of the representative transmitting units in scaled measuring environments, wherein the scaled measuring environments are shrunken in relation to the original environments to be analyzed, and
 wherein the representative transmitting units assigned to the navigation signal components are operated using scaled, higher frequencies. 
 
     
     
       3. The method according to  claim 1 , wherein, for the amplitude detection, received signals around the first frequency are first converted to a lower intermediate frequency before the amplitude analysis is performed. 
     
     
       4. The method according to  claim 1 , wherein the representative transmitting units are operated using an identical first frequency. 
     
     
       5. The method according to  claim 1 , wherein the representative transmitting units are operated at various frequencies, which lie within the bandwidth of the amplitude detection. 
     
     
       6. The method according to  claim 1  , wherein a plurality of representative transmitting units along a variable emission front is assigned to at least one navigation signal component, to simulate a position change or movement of the navigation signal components. 
     
     
       7. The method according to  claim 1 , wherein at least two of the representative transmitting units are oriented for emission in different spatial directions. 
     
     
       8. The method according to  claim 1 , wherein at least two sequential pause durations and/or signal receiving durations in the amplitude values are analyzed by the analysis unit to assign the representative transmitting units to timeslots of the received amplitude values. 
     
     
       9. The method according to  claim 1 , wherein the representative transmitting units emit signals in the gigahertz range. 
     
     
       10. The method according to  claim 1 , wherein the amplitude detection occurs in the zero span mode of the analysis unit. 
     
     
       11. The method according to  claim 1 , wherein either active transmitting durations of the representative transmitting units or pause durations of the representative transmitting units are equal. 
     
     
       12. The method according to  claim 1 , wherein the chronological activation of the representative transmitting units is performed using HF switches and/or delay lines. 
     
     
       13. The method according to  claim 1 , wherein the analysis unit is additionally implemented to analyze the frequency of received signals, in particular to detect Doppler shifts on the signal path. 
     
     
       14. A measuring method for analyzing the propagation of components of electromagnetic navigation signals,
 wherein at least one representative transmitting unit is assigned to each navigation signal component, resulting in a plurality of transmitting units, 
 wherein an analysis unit is coupled to a receiving unit and carries out an amplitude detection at a first frequency, characterized in that the multiple representative transmitting units are operated offset in time without time overlap, 
 wherein each representative transmitting unit of the plurality of transmitting units is assigned a characteristic transmitting duration for each of its assigned navigation signal components, which is respectively maintained in operating phases of the representative transmitting units, 
 wherein the analysis unit carries out a time-dependent amplitude detection, 
 wherein a time curve of received amplitude values is analyzed by the analysis unit to assign the representative transmitting unit and the assigned navigation signal components to timeslots of the received amplitude values, in that the durations of the received signals in the time curve of amplitude values are assigned to the transmitting durations of the representative transmitting unit. 
 
     
     
       15. The measuring method according to  claim 14 , wherein the propagation of the electromagnetic navigation signal components is analyzed with the aid of the representative transmitting units in scaled measuring environments, wherein the scaled measuring environments are shrunken in relation to the original environments to be analyzed, and
 wherein the representative transmitting units assigned to the navigation signal components are operated using scaled, higher frequencies. 
 
     
     
       16. The method according to  claim 15 , wherein at least one representative transmitting unit is fed using various chronological feed schemes, wherein the coupling of the feed is performed in a different manner for each of the feed schemes. 
     
     
       17. The method according to  claim 14 , wherein, for the amplitude detection, received signals around the first frequency are first converted to a lower intermediate frequency before the amplitude analysis is performed. 
     
     
       18. The method according to  claim 14 , wherein the representative transmitting units are operated using an identical first frequency. 
     
     
       19. The method according to  claim 14 , wherein the representative transmitting units are operated at various frequencies, which lie within the bandwidth of the amplitude detection. 
     
     
       20. The method according to  claim 14 , wherein at least one representative transmitting unit is fed using various chronological feed schemes, wherein the coupling of the feed is performed in a different manner for each of the feed schemes. 
     
     
       21. The method according to  claim 14 , wherein a plurality of representative transmitting units along a variable emission front is assigned to at least one navigation signal, to simulate a position change or movement of the navigation signal components. 
     
     
       22. The method according to  claim 14 , wherein at least two of the representative transmitting units are oriented for emission in different spatial directions. 
     
     
       23. The method according to  claim 14 , wherein at least two sequential pause durations and/or signal receiving durations in the amplitude values are analyzed by the analysis unit to assign the representative transmitting units to timeslots of the received amplitude values. 
     
     
       24. The method according to  claim 14 , wherein the representative transmitting units emit signals in the gigahertz range. 
     
     
       25. The method according to  claim 14 , wherein the amplitude detection occurs in the zero span mode of the analysis unit. 
     
     
       26. The method according to  claim 14 , wherein either active transmitting durations of the representative transmitting units or pause durations of the representative transmitting units are equal. 
     
     
       27. The method according to  claim 14 , wherein the chronological activation of the representative transmitting units is performed using HF switches and/or delay lines. 
     
     
       28. The method according to  claim 14 , wherein the analysis unit is additionally implemented to analyze the frequency of received signals, in particular to detect Doppler shifts on the signal path.