Measuring device and method for phase-coherent analysis of frequency-hopping signals

Patent metadata

Field	Value
Publication number	US-10348361-B2
Application number	US-201815938838-A
Country	US
Kind code	B2
Filing date	Mar 28, 2018
Priority date	Sep 29, 2017
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

A measuring device for phase-coherent analysis of frequency-hopping signals is provided. The measuring device comprises a signal acquisition unit and an analyzing unit. Whereas the signal acquisition unit is configured to obtain an In-phase/Quadrature-phase-signal (I/Q-signal) and to provide said I/Q-signal for the analyzing unit, the analyzing unit is configured to detect hop occurrences at nominal hop frequencies based on the provided I/Q-signal. In addition to this, the analyzing unit is further configured to specify at least one common reference frequency with respect to the hop occurrences.

First claim

What is claimed is:

1. A measuring device for phase-coherent analysis of frequency-hopping signals, the measuring device comprising:
a signal acquirer obtaining an In-phase/Quadrature-phase-signal (I/Q-signal), and
an analyzer receiving the I/Q-signal from the signal acquirer, detecting hop occurrences at nominal hop frequencies based on the provided I/Q-signal, specifying at least one common reference frequency with respect to the hop occurrences, and specifying at least one common reference phase with respect to the hop occurrences detected by the analyzer.

2. The measuring device according to claim 1 ,
wherein the at least one common reference frequency is based on an user-defined value or on at least one hop occurrence of the hop occurrences.

3. The measuring device according to claim 1 ,
wherein the at least one common reference phase is based on an at least one hop occurrence of the hop occurrences detected by the analyzer.

4. The measuring device according to claim 1 ,
wherein the analyzer is further configured to calculate a coherent reference phase trajectory over time based on at least one time stamp of the hop occurrences detected by the analyzer, and the at least one common reference frequency specified by the analyzer, and the at least one common reference phase.

5. The measuring device according to claim 4 ,
wherein the analyzer comprises a phase accumulator, and wherein with the aid of the information provided by the phase accumulator, the analyzer extrapolates the coherent reference phase trajectory.

6. The measuring device according to claim 4 ,
wherein the analyzer is further configured to calculate a deviation of the coherent reference phase trajectory to the at least one common reference phase.

7. The measuring device according to claim 6 ,
wherein the measuring device further comprises a display, wherein the display is configured to display the deviation as at least one measurement result.

8. The measuring device according to claim 6 ,
wherein the analyzer is further configured to apply at least one of the following further processing operations to the deviation: investigating the deviation with respect to its statistical characteristics, conducting trend analysis, fitting the deviation to an arbitrary curve or an user-defined curve.

9. A measuring method for phase-coherent analysis of frequency-hopping signals, the measuring method comprises the steps of:
obtaining an In-phase/Quadrature-phase-signal (I/Q-signal),
detecting hop occurrences at nominal hop frequencies based on the I/Q-signal,
specifying at least one common reference frequency with respect to the hop occurrences, and
specifying at least one common reference phase with respect to the detected hop occurrences.

10. The measuring method according to claim 9 ,
wherein the at least one common reference frequency is based on an user-defined value or on at least one hop occurrence of the hop occurrences.

11. The measuring method according to claim 9 ,
wherein the at least one common reference phase is based on an at least one hop occurrence of the detected hop occurrences.

12. The measuring method according to claim 9 ,
wherein the method further comprises the step of calculating a coherent reference phase trajectory over time based on at least one time stamp of the detected hop occurrences, and the at least one specified common reference frequency, and the at least one specified common reference phase.

13. The measuring method according to claim 12 ,
wherein the method further comprises the step of using a phase accumulator in order to extrapolate the coherent reference phase trajectory with the aid of the information provided by the phase accumulator.

14. The measuring method according to claim 12 ,
wherein the method further comprises the step of calculating a deviation of the coherent reference phase trajectory to the at least one common reference phase.

15. The measuring method according to claim 14 ,
wherein the method further comprises the step of displaying the deviation as at least one measurement result.

16. The measuring method according to claim 14 ,
wherein the method further comprises the step of applying at least one of the following further processing operations to the deviation: investigating the deviation with respect to its statistical characteristics, conducting trend analysis, fitting the deviation to an arbitrary curve or an user-defined curve.

Assignees

• Rohde & Schwarz

Inventors

• Lagler Andreas
• Cirillo Luke

Classifications

• H04B1/7156 Primary

  Arrangements for sequence synchronisation · CPC title

• H04B2001/71563

  Acquisition · CPC title

• G01R23/02 Primary

  Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage · CPC title

• H04B17/104

  of other parameters, e.g. DC offset, delay or propagation times · CPC title

• H03D7/165

  at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature (combined with amplitude demodulation H03D1/2245, combined with angle demodulation H03D3/007; N-path filters H03H19/002) · CPC title