Method for testing the electromagnetic compatibility of a radar detector with at least one onboard pulse signal transmitter

Patent metadata

Field	Value
Publication number	US-11280877-B2
Application number	US-201716348836-A
Country	US
Kind code	B2
Filing date	Nov 10, 2017
Priority date	Nov 10, 2016
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

The invention relates to a method for testing the electromagnetic compatibility of a radar detector with at least one onboard pulse signal transmitter, wherein said radar detector and each onboard transmitter are part of the same platform, by means of eliminating the external echo component in the signals received by the radar detector, said method comprising a training phase allowing the detected pulses to be divided into classes, grouping together the pulses for which at least two characteristics have a common range of values, and a phase of eliminating the pulses that belong to the selected classes.

First claim

The invention claimed is:

1. A method for testing an electromagnetic compatibility of a radar detector with at least one onboard pulse signal transmitter, the radar detector and each onboard transmitter belonging to a same platform, by eliminating an external echo component in signals received by the radar detector, the method comprising:
a training phase including, for each onboard transmitter:
an acquisition subphase seeking to obtain detected pulses, each pulse being characterized by characteristics, the characteristics including at least a date of arrival of the pulse and a carrier frequency of the pulse, the subphase including:
acquiring signals derived from pulses emitted by the onboard transmitter and each corresponding to the external echo component, to obtain the detected pulses, and
acquiring characteristic measurements of the detected pulses,

a computing subphase including:
distributing the detected pulses into classes grouping together the pulses for which at least two characteristics have a shared value range, and
selecting classes including a number of pulses greater than or equal to a predetermined threshold, to obtain selected classes, and

an elimination phase including:
building an elimination range, the elimination range being a set of pulses detectable by the radar detector belonging to the selected classes, and
eliminating, in the signals received by the radar detector, pulses belonging to the elimination range;

wherein the signals received by the radar detector comprise a first component, clutter, that is reflected by the land surface and a second component, the external echo component, that is reflected on external isolated objects.

2. The method according to claim 1 , wherein during each calculation subphase, the number of characteristics is less than 5.

3. The method according to claim 1 , wherein the characteristics include a pulse width and a direction of arrival.

4. The method according to claim 1 , wherein each calculating subphase includes a grouping of classes by using a distance criterion between two classes.

5. The method according to claim 1 , wherein the radar detector includes an attenuator, the elimination being implemented by using the attenuator preventing the detection of pulses belonging to the elimination range.

6. The method according to claim 1 , wherein the radar detector includes a calculator, the elimination being implemented by the calculator by eliminating detected pulses belonging to the elimination range.

7. The method according to claim 1 , wherein each onboard transmitter is capable of producing a synchronization signal, the training and elimination phases being paced using the synchronization signal of each onboard transmitter.

8. The method according to claim 1 , wherein the acquisition subphase includes formation and use of acquisition ranges.

9. A radar detector comprising an electromagnetic wave receiver and a calculator, the radar detector being configured to carry out a method for testing the electromagnetic compatibility of the radar detector with at least one onboard pulse signal transmitter, the radar detector and each onboard transmitter belonging to the same platform, by eliminating an external echo component in signals received by the radar detector, the method comprising:
a training phase including, for each onboard transmitter:
an acquisition subphase seeking to obtain detected pulses, each pulse being characterized by characteristics, the characteristics including at least a date of arrival of the pulse and a carrier frequency of the pulse, the subphase including:
acquiring signals derived from pulses emitted by the onboard transmitter and each corresponding to the external echo component, to obtain the detected pulses, and
acquiring characteristic measurements of the detected pulses,

a computing subphase including:
distributing the detected pulses into classes grouping together the pulses for which at least two characteristics have a shared value range, and
selecting classes including a number of pulses greater than or equal to a predetermined threshold, to obtain selected classes, and

an elimination phase including:
building an elimination range, the elimination range being a set of pulses detectable by the radar detector belonging to the selected classes, and
eliminating, in the signals received by the radar detector, pulses belonging to the elimination range;

wherein the signals received by the radar detector comprise a first component, clutter, reflected by the land surface and a second component, the external echo component, reflected on external isolated objects.

10. A platform equipped with the radar detector according to claim 9 .

Assignees

• Thales Sa

Inventors

• Jahan Daniel
• Quellec Jean-Michel
• Artis Jean-Paul
• Christien Daniel

Classifications

• G01S7/292

  Extracting wanted echo-signals · CPC title

• G01S7/023

  Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques (auxiliary means for detecting or identifying radar signals or the like G01S7/021; means for anti-jamming G01S7/36) · CPC title

• G01S7/021 Primary

  Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals · CPC title

• G01R31/001

  Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing (measuring electromagnetic fields G01R29/08; circuits for generating HV pulses in dielectric strength testing G01R31/14) · CPC title