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Adaptive side-lobe cancellation method for resisting multipath active suppressing interference

A technology for suppressing interference and self-adaptation, applied to radio wave measurement systems, instruments, etc., can solve problems such as effect influence, unstable performance of sidelobe cancellation algorithm, etc., achieve robust sidelobe cancellation and ensure stability

Active Publication Date: 2017-07-25
WUHAN BINHU ELECTRONICS
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Problems solved by technology

However, in the application of actual radar position conditions, it is found that different position environmental factors have a significant impact on the effect of the sidelobe cancellation algorithm for traditional airspace countermeasures against active suppression jamming
Through the analysis of a large

Method used

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  • Adaptive side-lobe cancellation method for resisting multipath active suppressing interference
  • Adaptive side-lobe cancellation method for resisting multipath active suppressing interference
  • Adaptive side-lobe cancellation method for resisting multipath active suppressing interference

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[0057] 1. Steps of space-time joint data of sidelobe cancellation channel:

[0058] 1.1 Constructing data delay section sub-steps;

[0059] A frame of data S after preprocessing each PRI inner sidelobe cancellation channel fi (t), respectively delay τ in the snapshot n (n=1,2,3,...,m), get the extended snapshot data matrix S fi (t-τ), the process is as follows figure 1 shown.

[0060] This embodiment adopts a system bandwidth of 2MHz, and the interference pattern is active continuous noise or dense false target suppression interference, the interference bandwidth is greater than or equal to the system bandwidth, and the number of interference sources is 2, which are respectively placed at 218° and 235° of the true north angle.

[0061]

[0062] Among them, τ n Indicates the delay value of the nth delay section, and τ indicates the delay of the entire data matrix.

[0063] 1.2 Substep of constructing space-time joint data block;

[0064] The sidelobe cancellation chan...

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Abstract

The invention relates to the ground-based radar active interference resistance field and particularly relates to an adaptive side-lobe cancellation method for resisting multipath active suppressing interference. According to the method, time-space joint of data in a side-lobe cancellation channel received by a radar is carried out, side-lobe cancellation is carried out through utilizing an ECA algorithm, and a stable side-lobe cancellation purpose is realized. The method is advantaged in that high sensitivity of performance of a radar side-lobe cancellation algorithm depends on the position environment is reduced, and stability of performance of the side-lobe cancellation algorithm is guaranteed.

Description

technical field [0001] The invention relates to the field of ground-based radar anti-active interference, in particular to a sidelobe cancellation method for self-adaptive anti-multipath active suppression interference. Background technique [0002] Countering active jamming is an important challenge for radars in modern warfare. The array antenna has more degrees of freedom in the airspace, so it is possible to counteract the active interference entering from the sidelobe of the antenna pattern from the perspective of the airspace. [0003] The existing theory of airspace countermeasures against active suppression jamming only considers the characteristics of the angle of arrival of jamming in free space, and obtains the optimal solution of jamming countermeasures under this condition. However, in the application of actual radar position conditions, it is found that different position environmental factors have a significant impact on the effect of the sidelobe cancellatio...

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Application Information

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IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 徐敏超李青陈钟韩文峰
Owner WUHAN BINHU ELECTRONICS
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