METHOD FOR LOCATING A RADIO CENTER AND SYSTEM FOR LOCATING A RADIO CENTER AND DATA PROCESSING UNIT

• US 20130141283A1
• Filed: 09/08/2010
• Published: 06/06/2013
• Est. Priority Date: 03/03/2010
• Status: Abandoned Application

• Current Assignee: Alexander S. Galov, Alexey P. Moshchevikin, Alexey V. Solovyev, Denis E. Gordeev
• Original Assignee: Alexander S. Galov, Alexey P. Moshchevikin, Alexey V. Solovyev, Denis E. Gordeev
• Inventors: Galov, Alexander S., Gordeev, Denis E., Moshchevikin, Alexey P., Solovyev, Alexey V.
• Application Number:
  US13/261,428
• Publication Number:
  US 20130141283A1
• Time in Patent Office: Days
• US Class Current: 342/464
• CPC Class Codes: G01S 5/08 Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location

Abstract

The present invention group is related to wireless radio communication and, in particular, to devices and methods for determining the location (position) of a radio center relative to radio centers with known location. A method and a system for locating a radio center are proposed, as well as data processing unit that allows to improve the accuracy of localization by selecting minimum distance values as measured by the radio signal propagation time for the entire period of immobility of the radio center. The technical result consists of the increase of the immunity of the localization method, reducing the duration of measuring period, the possibility of locating radio centers that are heterogeneous in terms of the method being used for determining their motion.

Claims

1. The method of the radio center localization by measuring the distances between the said radio center and radio centers with known locations (RCKL) by the signal propagation time between them that is characterized by the fact that in it

parameters of movement of the said radio center are measured,

radio signal strength from the said radio center is measured,

displacement of the radio center with the preset speed limit is calculated for the period of time between localization points,

accuracy of localization is calculated depending on the size of the overlapping area of circles with centers in these RCKL and radii that are equal to the measured distance between them and the said radio center,

these parameters of movement and change in the radio signal strength are compared with predefined threshold values, and the said displacement—

with the said localization accuracy and

location is calculated while taking into account minimum distance measured over the whole period of immobility, during which these movement parameters and changes in the said strength are less than the said threshold values, and the said displacement is less than the said accuracy of localization.

2. The method according to claim 1 is characterized by the fact that it measures the distance by the method of symmetric double-sided two-way ranging

3. The method according to claim 1 is characterized by the fact that it measures the distance by RTT method.

4. The method according to claim 1 is characterized by the fact that it uses previously positioned radio centers as RCKL.

5. The method according to any one of the claims 1-4, characterized by the fact that it measures the distance to at least one RCKL.

6. The method according to any one of the claims 1-4, characterized by the fact that it measures the distance to at least three RCKL that are installed at a distance from each other.

7. The method according to any one of claims 1-4, characterized by the fact that in it, if the said location accuracy is below the preset value, the distance between the said radio center and additional RCKL is measured.

8. The method according to any one of the claims 1-4, characterized by the fact that it uses such number of RCKL that is sufficient to achieve the pre-specified accuracy of localization.

9. The method according to claim 1, characterized by the fact that the RCKL used in it are selected based on the radio signal strength.

10. The method according to claim 1, characterized by the fact that the RCKL to be used are selected based on the accuracy of localization.

11. Method per claim 1 that is characterized by the fact that the location is calculated as a geometric locus of an internal point of the overlapping area of circles with centers in these RCKL and radii that are equal to the measured distances between them and the said radio center.

12. Method per claim 11 that is characterized by the fact that the location is calculated as the geometric locus of an internal point equidistant from the boundaries of the said area.

13. Method per claim 11 that is characterized by the fact that the location is calculated as the geometric locus of an internal point that is a provisional center of the weight of the said area.

14. The method according to any one of claims 11-13 that is characterized by the fact that the said area is formed with distances that were pre-adjusted depending on the signal strength.

15. The method according to any one of claims 11-13 that is characterized by the fact that according to it, to calculate the location of the said circles overlap area, some pre-defined areas, where the said radio center cannot be located, were excluded.

16. The method according to claim 1, characterized by the fact that according to it, measurement of the said motion parameters is performed by a magnetometer, accelerometer, odometer, tachometer and/or speedometer.

17. The method according to claim 1, characterized by the fact that according to it, measurement of the said motion parameters is performed by the Doppler frequency shift of the radio signal.

18. The method according to claim 1, characterized by the fact that according to it, to determine the direction of radio signal propagation, the difference of phases of the radio signal from the radio center is measured.

19. The method according to claim 1 that is characterized by the fact that according to it, to measure the distance and strength, a single radio signal is used.

27. Data processing unit for implementing the radio center localization method according to claim 1, containing the following:

telecommunications interface (TI) for receiving motion parameters of the said broadcasting center, parameters of the said radio center radio signal strength, and parameters of the distance between the said radio center and the radio center with known location (RCKL),

location calculator (LC) for the radio center within the parameters of the distance between the radio center and RCKL,

accuracy calculator (AC) of the said radio center locations, depending on the area of the overlapping circles with centers in RCKL and radii equal to the distances between the radio center and RCKL,

movement calculator (MC) of the said radio center with the preset speed limit for the period of time between consecutive localization points,

first comparator (FC) configured to compare the said parameters with predetermined threshold values,

second comparator (SC) configured to compare the said radio signal strength parameters with predetermined threshold values,

third comparator (TC) connected to the MC and AC and configured to compare the input values to each other,

memory device (MD),

forth comparator (4C) connected to the DC and configured to compare changes in the input value with the MD value,

first logical calculator (FLC), with the option to compute the Boolean function “

NOR”

,

second logical calculator (SLC), with the option to compute the Boolean functions “

AND”

,

recording unit (RU) configured to record the parameters of distances between RCKL and the said radio center in the MD,

characterized by the fact that according to it

FC, SC and TC outputs are connected to the FLC input, FLC output and 4C output are connected to the SLC input, and SLC output is connected to the RU.

28. The unit according to claim 27 that is characterized by the fact that in it at least two of the LC, DC, AC, MC, FLC, SLC, FC, SC, TC, 4C, and RU are arranged into a single integrated circuit.

29. The unit according to any one of the claim 27 or 28 that is characterized by the fact that in it at least one of the LC, DC, AC, MC, FLC, SLC, FC, SC, TC, 4C and RU was made on the basis of at least one general purpose processor, ASIC-processor, DSP-processor, programmable logic integrated circuit (PLIC) and/or electronic analog computing device.

30. The unit according to any of one of the claim 27 or 28 that is characterized by the fact that in it RCKL and LC, DC, AC, MC, FLC, SLC, FC, SC, TC, 4C and RU are linked by a single wired and/or wireless network.

31. The unit according to any of one of the claim 27 or 28 that is characterized by the fact that it further comprises distance calculator (DC) between RCKL and the said radio station.

20. Radio center localization system containing:

radio centers with a known location (RCKL),

time meter (TM) for signal propagation between the RCKL and the said radio centers by signal propagation time between them,

distance calculator (DC) between the RCKL and the said radio center that is connected to the said DC,

location calculator (LC) of the said radio center taking into account the distances between the RCKL and the said radio center,

accuracy calculator (AC) of the said radio center locations, depending on the area of the overlapping circles with centers in RCKL and radii equal to the distances between the radio center and RCKL,

movement calculator (MC) of the said radio center with the preset speed limit for the period of time between consecutive localization points,

meter of movement parameters for the said radio center (MMPR)

meter of radio signal strength parameters (MS) of the said radio center,

first comparator (FC) connected to the MMPR and configured to compare changes in the input value with a predetermined threshold value,

second comparator (SC) connected to the MS and configured to compare changes in the input value with a predetermined threshold value,

third comparator (TC) connected to the MC and AC and configured to compare the input values to each other,

memory device (MD),

forth comparator (4C) connected to the DC and configured to compare changes in the input value with the MD value,

first logical calculator (FLC), with the option to compute the Boolean function “

NOR”

,

second logical calculator (SLC), with the option to compute the Boolean functions “

AND”

,

recording unit (RU) configured to record the distances between RCKL and the said radio center in the MD,

characterized by the fact that in it

FC, SC and TC outputs are connected to the FLC input, FLC output and 4C output are connected to the SLC input, and SLC output is connected to the RU.

21. The system according to paragraph 20 is characterized by the fact that it further contains a fifth comparator (5C) that has the ability to compare accuracy of the said localization with a predetermined threshold value, and the sixth comparator (6C) with the ability to compare influence of the RCKL on the said localization accuracy, as well as the control unit (CU) configured to activate as many RCKL as necessary to ensure the accuracy of localization above the said threshold.

22. The system according to paragraph 20 is characterized by the fact that in it at least two of the LC, DC, AC, MC, FLC, SLC, FC, SC, TC, 4C, RU, 5C, 6C, CU are arranged into a single integrated circuit.

23. The system according to any of paragraphs 20-22 is characterized by the fact that in it at least one of the LC, DC, AC, MC, FLC, SLC, FC, SC, TC, 4C, RU, 5C, 6C, CU was made on the basis of at least one general purpose processor, ASIC-processor, DSP-processor, programmable logic integrated circuit (PLIC) and/or electronic analog computing device.

24. The system according to any of paragraphs 20-22 is characterized by the fact that in it RCKL and LC, DC, AC, MC, FLC, SLC, FC, SC, TC, 4C, RU, 5C, 6C, CU are linked by a single wired and/or wireless network.

25. The system according to paragraph 20 is characterized by the fact that in it the MMPR is a magnetometer, accelerometer, odometer, tachometer and/or speedometer.

26. The system according to paragraph 20 is characterized by the fact that in it the MMPR is based on the meters of the Doppler shift.