Antenna port intermodulation conduction sensitivity measurement method based on grouping test

Abstract

The invention discloses a grouping test-based antenna port intermodulation conduction sensitivity measurement method, which comprises the following steps of: determining a test prior probability according to a non-linear combination frequency rule, performing multi-frequency point grouping detection on a large number of test frequency points by using a grouping detection method, performing multiple times of grouping detection based on an optimal grouping theory, and determining the inter-modulation conduction sensitivity of an antenna port. And finally, detecting the suspected frequency points one by one. According to the method provided by the invention, the broadband measurement time is saved, and the test accuracy can be ensured; the suspected sensitive frequency points can be quickly screened, the frequency point stepping requirement of the sensitivity test can be ensured, and the test time can be obviously shortened. When the actual frequency of a signal generator, a receiver or other frequency response equipment deviates from the theoretical frequency, the accuracy of the test can be ensured, and more accurate sensitivity evaluation is realized by further increasing the number of suspected frequency points.

Description

technical field [0001] The invention belongs to the technical field of test and measurement, and in particular relates to a group test-based method for measuring antenna port intermodulation conduction sensitivity. Background technique [0002] In electronic information systems, receiving equipment with antenna ports is the most sensitive part of all equipment subsystems, so it is very easy to introduce interference, mainly including intermodulation, intermodulation, spurious response, harmonic interference, etc. These problems are mainly caused by nonlinear effects. Among them, intermodulation interference mainly refers to the fact that two or more signals of different frequencies enter the antenna port at the same time, and a new combination of frequency components is generated due to nonlinear effects, and some of the frequencies are close to the operating frequency of the receiver, which will form interference through the receiver. All equipment with nonlinear circuits ...

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Problems solved by technology

[0004] In order to solve the problem of test cost and test accuracy in the 15kHz-10GHz antenna port intermodulation conduction susceptibility test method (hereinafter referred to as CS103) in the existing "Electromagnetic Emission and Sensitivity Requirements and Measurements of Military Equipment and Subsystems" (hereinafter referred to as GJB151B-2013) To solve the problem of difficult balance between antenna port intermodulation conduction susceptibility, a fast measurement method based on group test is proposed

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