MSK decoding sensitivity accurate test method applied to interrogator

A test method and interrogator technology, applied in the field of interrogators, can solve problems such as one-sided test content, incomplete MSK decoding sensitivity test objects, and inaccurate test results, so as to achieve complete test objects, accurate and comprehensive test results, and reduce effect of error

Active Publication Date: 2021-02-26
四川九洲空管科技有限责任公司
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  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to: aim at the above-mentioned existing problems, provide a kind of MSK decoding sensitivity precision testing method that is applied to interrogator; The present invention solves the problem of MSK decoding The problem of incomplete code sensitivity test object; solved the problem of inaccurate test results; also solved the problem of one-sided test content

Method used

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  • MSK decoding sensitivity accurate test method applied to interrogator
  • MSK decoding sensitivity accurate test method applied to interrogator
  • MSK decoding sensitivity accurate test method applied to interrogator

Examples

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Embodiment 1

[0043] A method for accurately testing MSK decoding sensitivity applied to an interrogator, characterized in that it includes:

[0044] S1: Determine the test equipment.

[0045] In the above steps, the test equipment includes a response simulator, a circulator, a variable attenuator, a fixed attenuator, a peak power meter and a network analyzer.

[0046] In the MSK working mode, the interrogation signal of the interrogator is encrypted, and the code changes all the time, and the response signal must also change accordingly to decode, but the analog response signal compiled by the general instrument cannot change accordingly, so only a special test instrument can be selected - Response simulator to test the interrogator's MSK decoding sensitivity parameters.

[0047] All interrogators have Σ and Ω radio frequency channels, of which the Σ channel is the main inquiry receiving channel, and the Ω channel is used for sidelobe suppression; the response simulator is a single radio fr...

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Abstract

The invention discloses an MSK decoding sensitivity accurate test method applied to an interrogator, and the method is characterized in that the method comprises the steps: determining a test instrument; determining a test connection block diagram according to the instrument; expressing key parameters and restrictions of the equipment to be tested and the test instrument and restrictions of the connection block diagram through a formula; determining an attenuation value of each position in the test connection block diagram; compiling a test step; and testing the MSK decoding sensitivity according to the test steps. According to the test method, a test platform is built by performing formulation calculation on parameters of the to-be-tested equipment and the test instrument, and then the MSK decoding sensitivity of the to-be-tested equipment is accurately measured and calculated; according to the test method, various test objects can be detected, so that the test objects are complete; through the calculation of each formula, the obtained test result is more accurate and comprehensive, and the error of the test result is effectively reduced.

Description

technical field [0001] The invention relates to the field of interrogators, in particular to an accurate test method for MSK decoding sensitivity applied to interrogators. Background technique [0002] The interrogator sends an inquiry signal to the transponder, and the transponder replies with a response signal after receiving the interrogation signal. The interrogator receives the response signal and decodes it to obtain code, altitude, position and other information and form a point track. [0003] The interrogator has three modulation methods: ASK, DPSK and MSK. Among them, ASK decoding sensitivity and DPSK decoding sensitivity have been directly tested by special testers; MSK is the latest existing modulation method, and there is no special tester that can directly test the MSK decoding sensitivity of interrogators (interrogators in MSK working mode When the decoding probability of the Σ channel is not lower than 90%, the minimum amplitude of the response signal is its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B17/10H04B17/20
CPCH04B17/0085H04B17/10H04B17/20Y02D30/70
Inventor 张晗李洪良李建秋
Owner 四川九洲空管科技有限责任公司
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