Method and a measuring device for investigating signal parameters

Patent metadata

Field	Value
Publication number	US-10670631-B2
Application number	US-201615166627-A
Country	US
Kind code	B2
Filing date	May 27, 2016
Priority date	Sep 2, 2015
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

The invention relates to a method for investigating signal parameters in an electrical measuring device with a display element with the method steps: display of a detected signal on the display element, manual masking of at least one signal component of the signal by a user by means of a masking element of the measuring device and investigation of signal parameters from the masked signal component or from the unmasked signal component of the signal by the measuring device. At least one further signal parameter is also investigated alongside the time duration and the bandwidth of the masked signal component. According to the invention, a corresponding measuring device is also provided.

First claim

What is claimed is:

1. A method of automatically determining signal parameters in an electrical measuring device with a display element, the method comprising:
displaying a detected signal that includes at least one unmasked signal component or masked signal component on the display element, wherein an amplitude information or a power information of the detected signal is displayed on a two-dimensional frequency and time plane,
manual masking to make a manually masked signal component of at least one unmasked signal component or masked signal component of the detected signal by means of a masking element of the measuring device, the manual masking comprising applying a window function line-wise or block-wise in the frequency and time plane to the at least one unmasked signal component or masked signal component,
determining grid points in the manually masked signal component, wherein determining a grid point of the grid points comprises determining at least one of a local minimum or a local maximum associated with the manually masked signal component;
interpolating, based on the grid points, a polynomial representing the manually, masked signal component, and
determining, based on the polynomial representing the manually masked signal component, signal parameters of the manually masked signal component by the measuring device, wherein the signal parameters comprise a time duration and a bandwidth of the manually masked signal component.

2. The method according to claim 1 ,
wherein a user masks the at least one masked signal component or unmasked signal component by means of a finger touch on a touch-sensitive screen as the masking element of the measuring device.

3. The method according to claim 1 ,
wherein at least one further signal parameter is determined alongside a time duration and a bandwidth of a masked signal component.

4. The method according to claim 1 ,
wherein the detected signal is analyzed by means of the determined signal parameters, wherein signal components of the detected signal with similar or identical determined signal parameters are determined by means of the measuring device.

5. The method according to claim 4 ,
wherein the determined, analyzed signal components are recognizably marked on the display element of the measuring device.

6. The method according to claim 1 ,
wherein the determined signal parameters are output on the display element.

7. The method according to claim 1 ,
wherein the at least one unmasked signal component or masked signal component is approximated by the polynomial.

8. The method according to claim 7 ,
wherein polynomial coefficients approximate the phase of the at least one unmasked signal component or masked signal component with the polynomial.

9. The method according to claim 1 ,
wherein the grid points for an approximation of the polynomial are determined by means of the window function applied line-wise or block-wise in the frequency/time plane, wherein smallest errors squared are determined.

10. The method according to claim 5 ,
wherein the window function is aligned with a gradient of a power or amplitude of a signal in the masked signal component or in the unmasked signal component.

11. The method according to claim 1 ,
wherein the masked signal component defines a time duration and a bandwidth as signal parameters, which are obtained from the signal data of the detected signal.

12. The method according to claim 1 ,
wherein signal components which are rejected for the determining of the signal parameters are determined by the masking.

13. The method according to claim 1 ,
wherein a threshold-value filter is applied to the masked signal components or the unmasked signal components.

14. A measuring device, comprising
a signal input, for connection of an analog signal to be detected;
an analog-digital converter, for the conversion of the analog signal into a digital signal to be detected;
a display element for the display of the detected digital signal that includes at least one unmasked signal component or masked signal component, wherein an amplitude information or a power information of the signal to be detected is displayed on a two-dimensional frequency and time plane;
a masking element for manual masking to make a manually masked signal component of the at least one unmasked signal component or masked signal component of the detected signal, the manual masking comprising applying a window function line-wise or block-wise in the frequency and time plane to the at least one unmasked signal corn orient or masked signal component;

a computer unit for:
determining grid points in the manually masked signal component, wherein determining a grid point of the grid points comprises determining at least one of a local minimum or a local maximum associated with the manually masked signal component are determined;
interpolating, based on the grid points, a polynomial representing the manually masked signal component; and

determining, based on the polynomial representing the manually masked signal component signal parameters of the manually masked signal component, wherein the signal parameters comprise a time duration and a bandwidth of the manually masked signal component.

15. The measuring device according to claim 14 ,
wherein the masking element is a touch-sensitive screen of the display element or an input device of the measuring device.

16. The measuring device according to claim 14 ,
wherein a marking unit is provided in the measuring device, and
wherein the determined signal parameters are supplied to the marking unit, wherein the marking unit marks signal components of the detected signal with similar or identical signal parameters.

Assignees

• Rohde & Schwarz

Inventors

• Cirillo Luke
• Lagler Andreas
• Lohmer Clemens

Classifications

• G01R29/0892

  Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value · CPC title

• G01R13/0245

  for inserting reference markers · CPC title

• G01R13/0218 Primary

  Circuits therefor · CPC title