Method as well as device for timeslot-wise detection of at least one radio signal

Patent metadata

Field	Value
Publication number	US-11096135-B2
Application number	US-201916680276-A
Country	US
Kind code	B2
Filing date	Nov 11, 2019
Priority date	Jan 30, 2019
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

A method of timeslot-wise detection of at least one radio signal in a cellular radio network. A radio signal is received via at least one first radio antenna and at least one second radio antenna. The radio signal received by the respective radio antennas is forwarded to at least one first radio receiver assigned to the first radio antenna and to at least one second radio receiver assigned to the second radio antenna. The radio signal forwarded is evaluated. The radio receivers are synchronized with a preconfigured frame structure. At least one identical time slot is selected out of the frame structure Timing information of the selected time slot is provided from the first radio receiver to the second radio receiver, from the second radio receiver to the first radio receiver and/or from the respective radio receiver to a central unit for calculating a time difference of arrival. Further, a device for timeslot-wise detection is described.

First claim

The invention claimed is:

1. A method of timeslot-wise detection of at least one radio signal in a cellular radio network, wherein a radio signal is received via at least one first radio antenna and at least one second radio antenna, wherein the radio signal received by the respective radio antennas is forwarded to at least one first radio receiver assigned to the first radio antenna and to at least one second radio receiver assigned to the second radio antenna, and wherein the radio signal forwarded is evaluated by the following steps:
synchronizing the first radio receiver with a preconfigured frame structure and synchronizing the second radio receiver with a preconfigured frame structure;
selecting at least one identical time slot out of the frame structure at the first radio receiver and the second radio receiver; and
providing timing information of the selected time slot from the first radio receiver to the second radio receiver, from the second radio receiver to the first radio receiver and/or from the respective radio receiver to a central unit for calculating a time difference of arrival.

2. The method according to claim 1 , wherein the radio receivers are synchronized with a system clock and/or a timing source of the cellular radio network.

3. The method according to claim 1 , wherein the preconfigured frame structure corresponds to a communication standard to be investigated that is used by the cellular radio network.

4. The method according to claim 1 , wherein at least one interference is detected in the at least one radio signal such that an interfering emitter is identified.

5. The method according to claim 4 , wherein the interfering emitter detected is displayed graphically and/or wherein the interfering emitter detected is written to a flag.

6. The method according to claim 1 , wherein the time difference of arrival calculated is post-processed.

7. The method according claim 1 , wherein the location of the emitter identified by direction finding is graphically displayed and/or wherein a flag for a correct or faulty signal is set.

8. A device for timeslot-wise detection of at least one radio signal in a cellular radio network, comprising at least one first radio antenna configured to receive the radio signal, at least one second radio antenna configured to receive the radio signal, at least one first radio receiver configured to process the radio signal, at least one second radio receiver configured to process the radio signal and at least one evaluation unit, wherein the evaluation unit is configured to evaluate the at least one radio signal, wherein the evaluation unit is configured to synchronize the respective radio receivers with a preconfigured frame structure and to select at least one identical time slot out of the frame structure at the respective radio receivers, and wherein the evaluation unit is configured to provide timing information of the selected time slot from the first radio receiver to the second radio receiver, from the second radio receiver to the first radio receiver and/or from the respective radio receiver to a central unit for calculating a time difference of arrival.

9. The device according to claim 8 , wherein one evaluation unit is provided for each radio receiver so that each radio receiver is assigned to its own evaluation unit.

10. The device according to claim 9 , wherein the at least two evaluation units are interconnected with each other.

11. The device according to claim 8 , wherein the respective radio antenna and the corresponding radio receiver are connected with each other so that the radio signal received by the respective radio antenna is forwarded to the corresponding radio receiver.

12. The device according to claim 8 , wherein the radio receivers are synchronized with a system clock and/or a timing source of the cellular radio network.

13. The device according to claim 8 , wherein the preconfigured frame structure corresponds to a communication standard to be investigated that is used by the cellular radio network.

14. The device according to claim 8 , wherein a post-processor is provided that is connected to the evaluation unit, wherein the post-processor is configured to post-process the time difference of arrival calculated.

15. The device according to claim 14 , wherein the post-processor is configured to set a flag for a correct or faulty signal is set.

16. The device according to claim 8 , wherein a display is provided with which the evaluation unit is connected.

17. The device according to claim 16 , wherein the evaluation unit and the display are configured to graphically display the identified location of the emitter on the display.

18. The device according to claim 8 , wherein the evaluation unit is configured to detect at least one interference in the at least one radio signal in order to identify an interfering emitter.

19. The device according to claim 18 , wherein the evaluation unit and the display are configured to graphically display the interfering emitter detected on the display and/or wherein the evaluation unit and the display are configured to write the interfering emitter detected to a flag.

Assignees

• Rohde & Schwarz

Inventors

• Hisch Martin

Classifications

• H04W72/541

  using the level of interference · CPC title

• H04W84/042

  Public Land Mobile systems, e.g. cellular systems · CPC title

• H04W56/001 Primary

  Synchronization between nodes · CPC title

• H04L43/045

  for graphical visualisation of monitoring data · CPC title

• G01S5/04

  Position of source determined by a plurality of spaced direction-finders · CPC title