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A high-precision anti-interference method and device based on interference bandwidth detection

A bandwidth detection and high-precision technology, which is applied in the field of anti-interference, can solve the problems of poor signal positioning accuracy and poor positioning accuracy, and achieve the effect of improving accuracy, improving overall performance, and ensuring interference suppression

Active Publication Date: 2021-06-29
CHENGDUSCEON TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that there are very few researches on signal positioning accuracy after anti-jamming, and almost all of them focus on those with higher interference-to-signal ratio and more interference numbers, but the signal positioning accuracy after anti-jamming is poor. Problem, the present invention provides a high-precision anti-jamming method and device based on interference bandwidth detection to solve the above-mentioned problems. According to the interference signal bandwidth detection results, the covariance matrix of the sampling data is corrected, so that the frequency spectrum after anti-jamming under different interference patterns maintains a high integrity, thereby improving the positioning accuracy of the receiver after anti-jamming, and comprehensively improving the overall anti-jamming performance, improving the reliability of engineering applications

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  • A high-precision anti-interference method and device based on interference bandwidth detection

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Embodiment 1

[0062] like Figure 1 to Figure 4 As shown, the space-time joint anti-jamming technology greatly improves the ability to resist suppressive jamming through the joint processing of space and time two-dimensional domains. In order to achieve the optimal performance of this technology, an algorithm based on the inversion of the sampling covariance matrix is ​​used To obtain the filtering weight after anti-interference, and form a null in the interference direction, so as to achieve the purpose of suppressing interference. Due to the addition of time-domain filtering, the frequency spectrum of the entire signal is also affected while suppressing interference. In severe cases, it may cause the loss of useful signals while suppressing interference, making it impossible to locate. Especially for a navigation signal with only 2M bandwidth like GPS, the influence of the integrity of the spectrum after anti-jamming on the positioning accuracy of the receiver is more obvious. Therefore,...

Embodiment 2

[0122] like Figure 1 to Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment provides a high-precision anti-jamming device based on interference bandwidth detection, and the device supports a high-precision anti-jamming device based on interference bandwidth detection in Embodiment 1. The interference method, the device includes an AD sampling module, an interference bandwidth detection module, and an anti-interference processing module, wherein:

[0123] The AD sampling module is used to receive the time-domain signal of the antenna array and perform sampling processing;

[0124] The interference bandwidth detection module is used to convert the time domain signal sampled by the AD sampling module to the frequency domain by using a frequency domain processing method to perform interference spectrum detection, and determine the bandwidth of the signal by setting the noise threshold, thereby obtaining the interference signal Spect...

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Abstract

The invention discloses a high-precision anti-interference method and device based on interference bandwidth detection. Come up to detect the interference spectrum, judge the bandwidth of the signal by setting the noise threshold, so as to obtain the spectral bandwidth of the interference signal; construct a space-time joint adaptive anti-jamming method, use the modified sampling data covariance matrix inversion algorithm, based on the obtained interference Signal spectrum bandwidth, anti-jamming processing and anti-jamming output signal, guiding engineering use. In terms of the realization of the present invention, the covariance correction based on sampling data is adopted, and its engineering complexity has no obvious change when it is not corrected, and the calculation accuracy of matrix inversion reaches the theoretical calculation accuracy, and the zero trap depth formed by its anti-interference must also be able to To be optimal, while ensuring interference suppression, the accuracy of receiver positioning after anti-interference is improved.

Description

technical field [0001] The invention relates to the field of anti-interference technology, in particular to a high-precision anti-interference method and device based on interference bandwidth detection. Background technique [0002] With the continuous development of anti-jamming technology, a single anti-jamming method can no longer meet the needs of the receiver. For example, time-domain and frequency-domain anti-jamming cannot resist broadband interference. At present, space-time joint anti-jamming technology is generally used in engineering, which can not only To fight against broadband suppressed signals, the time domain can also be used to increase the number of anti-interference, so as to achieve the purpose of increasing the degree of freedom. However, the current receiver is no longer satisfied with a single anti-jamming function, and the requirements for the number, pattern, and interference-to-signal ratio of anti-jamming are constantly increasing, and the positi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10H04B17/345G01S19/21
CPCG01S19/21H04B1/1027H04B17/345
Inventor 王晓洪吴仡唐明钟勇张涛李富生辜永忠王胜伟佟力龚玉超
Owner CHENGDUSCEON TECH