An anti-jamming processing method of antenna array under the background of power enhancement
A processing method and antenna array technology, applied in radio wave measurement systems, satellite radio beacon positioning systems, instruments, etc., can solve problems such as navigation signal power attenuation, and achieve the effect of suppressing large-scale attenuation
Active Publication Date: 2019-06-28
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
Aiming at the problem that antenna array anti-jamming will lead to serious attenuation of navigation signal power under the background of power enhancement, a method to solve this problem is designed. Its structure is simple and easy to implement. In the research and development of adaptive antenna array anti-jamming algorithm It has practical value and improves the anti-jamming technology of satellite navigation receiver antenna array
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[0025] The method of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0026] Such as figure 1 Shown is the schematic flow chart of the method of the present invention. The technical solution of the present invention is to provide an adaptive anti-jamming processing method that suppresses the large-scale attenuation of navigation signal power, so as to ensure the significance of power enhancement to improve the navigation combat capability of the navigation system. The specific steps are:
[0027] (S1) In the case of no interference, estimate the received power of each channel of the antenna array, and the received power of the nth channel P n Expressed as:
[0028]
[0029] where x n (i) is the sampling value of the nth channel at time i, L is the data length required for power estimation, i=1, 2,..., L, H represents the matrix conjugate transpose symbol; figure 1 middle x 1 (t),...,x N (t) is the ...
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The invention belongs to the technical field of array signal processing, and specifically relates to an anti-interference treatment method of an antenna array in a power enhancement background. The method comprises the following steps: (S1) in the absence of interference, estimating the received power of each channel of an antenna array; (S2) in the presence of interference, calculating the maximum likelihood estimation of a correlation matrix of received signals; (S3) calculating a correlation matrix preprocessing result according to the received power and the maximum likelihood estimation of the correlation matrix of the received signals; (S4) calculating the weight of the correlation matrix preprocessing result in (S3); and (S5) array-weighting the received signals, and outputting signals after anti-interference treatment. According to the invention, the correlation matrix is estimated according to the received power (including signal and noise power) in the absence of interference and then preprocessed, and then, anti-interference treatment is performed based on the power inversion criterion. Great attenuation of navigation signal power can be suppressed.
Description
technical field [0001] The invention belongs to the technical field of array signal processing, in particular to an antenna array anti-interference technology, and in particular to an antenna array anti-interference processing method under the background of power enhancement. Background technique [0002] Although GPS has been extensively developed in the military and civilian fields, its accuracy, integrity, continuity and effectiveness still need to be further improved for applications such as aviation navigation. In the late 1990s, the U.S. government proposed a GPS modernization plan to improve the performance of the military and civilian Global Positioning System (GPS, Global Position System). An important feature in the modernization plan is: by 2020, GPS will have excellent navigation warfare performance, at least in the battlefield area, the navigation signal can be enhanced by 30dB, which will make the signal-to-noise ratio of the ground receiver signal received by ...
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IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 聂俊伟鲁祖坤欧钢陈飞强李建耿正霖戴鑫志陈雷刘哲
Owner NAT UNIV OF DEFENSE TECH