Signal assessment system and signal assessment method

• US 10,324,159 B2
• Filed: 01/29/2018
• Issued: 06/18/2019
• Est. Priority Date: 08/02/2017
• Status: Active Grant

• Current Assignee: Rohde & Schwarz GmbH & Company KG
• Original Assignee: Rohde & Schwarz GmbH & Company KG
• Inventors: Marinescu, Radu-Sebastian
• Primary Examiner(s): Nguyen, Hai V
• Application Number:
  US15/882,747
• Publication Number:
  US 20190041486A1
• Time in Patent Office: 505 Days
• Field of Search: 455 677, 455563
• CPC Class Codes: G01S 3/46 using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
• CPC Class Codes: G08G 5/0008 with other aircraft
• CPC Class Codes: G08G 5/0013 with a ground station
• CPC Class Codes: G08G 5/0026 located on the ground
• CPC Class Codes: G08G 5/0043 Traffic management of multiple aircrafts from the ground G08G5/003 takes precedence; data processing specially designed for resource management, e.g. scheduling or allocating time, human or machine resources G06Q10/06
• CPC Class Codes: G08G 5/0078 for monitoring traffic from the aircraft radar or analogous systems specially adapted for traffic control G01S13/91
• CPC Class Codes: G08G 5/0082 for monitoring traffic from a ground station radar or analogous systems specially adapted for traffic control G01S13/91
• CPC Class Codes: G10L 25/03 characterised by the type of extracted parameters
• CPC Class Codes: G10L 25/12 the extracted parameters being prediction coefficients
• CPC Class Codes: G10L 25/51 for comparison or discrimination

Abstract

The present invention provides a signal assessment system for assessing air traffic control signals, the signal assessment system comprising at least two wireless signal receivers configured to receive wireless signals, a signal comparator coupled to the wireless signal receivers and configured to compare the received wireless signals and to provide respective comparison results, and a user indicator coupled to the signal comparator configured to indicate to a user based on the comparison results if the received wireless signals originate from the same wireless source signal or if the received wireless signals originate from different wireless source signals. Further, the present invention provides a signal assessment method.

Claims

1. A signal assessment system for assessing air traffic control signals, the signal assessment system comprising:

at least two wireless signal receivers configured to receive wireless signals,

a signal comparator coupled to the wireless signal receivers and configured to compare the received wireless signals and to provide respective comparison results; and

a user indicator coupled to the signal comparator configured to indicate to a user based on the comparison results if the received wireless signals originate from the same wireless source signal or if the received wireless signals originate from different wireless source signals.

2. The system of claim 1, wherein the signal comparator comprises a server that is communicatively coupled to the single wireless signal receivers.

3. The system of claim 1, wherein the signal comparator comprises a delay compensator that is configured to compensate a time delay of the received wireless signals prior to comparing the received wireless signals.

4. The system of claim 1, wherein the signal comparator comprises a decomposition unit configured to decompose the received wireless signals into Mel Frequency Cepstral Coefficients, and wherein the signal comparator comprises a coefficient comparator that is configured to compare the determined Mel Frequency Cepstral Coefficients and provide respective comparison results.

5. The system of claim 4, wherein the coefficient comparator is configured to determine respective Mel Frequency Cepstral Coefficients of two received wireless signals to match if they comprise less than a predetermined distance to each other.

6. The system of claim 4, wherein the signal comparator comprises a warping unit configured to perform a dynamic time warping on the received wireless signals and to provide respective comparison results.

7. The system of claim 4, wherein the signal comparator comprises a linear predictive coding unit configured to perform a linear predictive coding on the received wireless signals, and wherein the signal comparator comprises a filter coefficient comparator that is configured to compare coefficients resulting from the linear predictive coding to provide respective comparison results.

8. The system of claim 4, further comprising a signal evaluation unit that is configured to determine based on the results provided by the signal comparator if the received wireless signals originate from the same source signal or if the received wireless signals originate from different source signals.

9. A signal assessment method for assessing air traffic control signals, the signal assessment method comprising:

receiving wireless signals with at least two wireless receivers,

comparing the received wireless signals;

providing respective comparison results; and

indicating to a user based on the comparison results if the received wireless signals originate from the same wireless source signal or if the received wireless signals originate from different wireless source signals.

10. The method of claim 9, wherein comparing the received wireless signals and providing respective comparison results is performed with a server that is communicatively coupled to the single wireless signal receivers.

11. The method of claim 9, further comprising compensating a time delay of the received wireless signals prior to comparing the received wireless signals.

12. The method of claim 9, further comprising decomposing the received wireless signals into Mel Frequency Cepstral Coefficients, and comparing the determined Mel Frequency Cepstral Coefficients and providing respective comparison results.

13. The method of claim 12, wherein comparing the Mel Frequency Cepstral Coefficients comprises determining respective Mel Frequency Cepstral Coefficients of two received wireless signals to match if they comprise less than a predetermined distance to each other.

14. The method of claim 12, further comprising performing a dynamic time warping on the received wireless signals and providing respective comparison results.

15. The method of claim 12, further comprising performing a linear predictive coding on the received wireless signals, and comparing coefficients resulting from the linear predictive coding to provide respective comparison results.

16. The method of claim 12, further comprising determining based on the comparison results if the received wireless signals originate from the same source signal or if the received wireless signals originate from different source signals.