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Method for detecting weak harmonic interference signals inside satellite navigation anti-interference antenna system

A satellite navigation and antenna system technology, applied in the field of satellite navigation anti-jamming, can solve problems such as missed detection, and achieve the effect of improving detection probability and signal-to-noise ratio.

Active Publication Date: 2018-06-22
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

For weak harmonic interference signals whose power is close to or weaker than the system noise, manual detection and identification can easily lead to missed detection

Method used

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  • Method for detecting weak harmonic interference signals inside satellite navigation anti-interference antenna system
  • Method for detecting weak harmonic interference signals inside satellite navigation anti-interference antenna system
  • Method for detecting weak harmonic interference signals inside satellite navigation anti-interference antenna system

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0020] The inventive method realizes steps as follows:

[0021] Step 1: In the absence of external electromagnetic interference, collect and store the digital signal output by the analog-to-digital converter (A / D) of the satellite navigation anti-interference antenna for T milliseconds (T≥1), corresponding to each channel The number of stored data points is L, L and the storage time length T (the dimension is milliseconds, denoted as ms) and the sampling frequency of the analog-to-digital converter (A / D) F s (The dimension is megahertz, denoted as MHz) The calculation relationship between is:

[0022] L=T×F s ×10 3 (1)

[0023] Assuming that the satellite navigation anti-jamming antenna system contains M channels, the collected and stored data forms a matrix with a dim...

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Abstract

The invention provides a method for detecting weak harmonic interference signals inside a satellite navigation anti-interference antenna system. Spectrum energy adaptive coherent integration serves asinspection amount, judgment threshold is adaptively computed, and the weak harmonic interference signals inside the satellite navigation anti-interference antenna system are detected. Compared with amanual detection and recognition method, the method has the advantages that original digital signals sampled by channels inside the system are automatically detected, the detection threshold is adaptively determined based on sampled data, and the detection probability of the weak harmonic signals inside the system can be effectively improved.

Description

technical field [0001] The invention belongs to the field of satellite navigation anti-jamming, and relates to a method for detecting weak harmonic interference signals inside a satellite navigation anti-jamming antenna system. Background technique [0002] At present, the satellite navigation anti-jamming antenna system is the key equipment to protect the normal operation of the satellite navigation receiver in the complex electromagnetic environment. In order to make the performance of the satellite navigation anti-jamming antenna system reach the optimal design value, it is necessary to accurately detect and eliminate the factors that affect the system performance in the process of system design, production and debugging. [0003] The satellite navigation anti-jamming antenna system is mainly composed of four parts: receiving array antenna, low noise amplifier, multi-channel radio frequency component and digital signal processing component. Due to the processing technolo...

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Application Information

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IPC IPC(8): G01S19/21G01S19/37
CPCG01S19/21G01S19/37
Inventor 王晓宇张铁峰张骅董正芳其他发明人请求不公开姓名
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP