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High-dynamic-interference auto-tracking steady suppression method

A self-tracking, high-dynamic technology, applied in the field of signal processing, can solve the problems of poor suppression of high-dynamic interference, inability to distinguish between signals and dynamic interference, and no zero trap self-tracking performance, etc., to achieve accurate feature tracking and widening Zero trapping, the effect that the suppression effect is obvious

Active Publication Date: 2013-02-27
杭州拓扑视觉科技有限公司
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Problems solved by technology

However, for high dynamic interference suppression, the above methods are no longer applicable, because these methods cannot effectively track the characteristics of dynamic interference. When the incoming wave direction of interference changes rapidly, using these methods for interference suppression cannot real-time monitor the interference position in the pattern The formation of zero traps, that is, no zero trap self-tracking performance, so that the array cannot distinguish between signals and dynamic interference, resulting in poor suppression of high dynamic interference

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[0034] Reference Array Model figure 1 and process figure 2 , the steps that the present invention realizes are as follows:

[0035] Step 1. Digitally sample the antenna array to obtain a batch of received data X=a containing signals and dynamic interference s S 0 +a i S i +n, assuming that the direction of arrival of the signal is known in advance through the direction finding method, where X is an M×N dimensional matrix, M is the number of array elements, N is the number of data samples, and S 0 is a vector composed of signals in the received data, a s is the signal steering vector, S i is the vector composed of interference in the received data, a i is the dynamic interference steering vector, and n is the noise in the received data.

[0036] Step 2. Use inner and outer loops to suppress dynamic interference. The inner loop completes the feature tracking of r interferences in the received data X, and the outer loop uses the characteristics of these interferences to ...

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Abstract

The invention discloses a high-dynamic interference auto-tracking steady suppression method which is mainly used for solving the problem that a normal anti-interference method is poor in dynamic interference suppression effect. The method provided by the invention is implemented through the following process: using two circulations to realize the dynamic interference suppression, wherein the internal circulation is used for completing the feature tracking of the dynamic interference, using a first i-th interference feature vector wi(t-1) at a t-1 moment and receiving data X(:, t) at a t moment to obtain a feature wave-beam output yi(t) at the t moment, and then using the feature wave-beam output yi(t) at the t moment and a feature value di(t-1) at the ith dynamic interference at the t-1 moment to update a dynamic interference feature di(t) at the t moment and the interference feature vector wi(t) at the t moment; then using the interference feature vector wi(t) and the feature beam output yi(t) at the t moment to update the receiving data vector X(:, t) at the t moment; and using all dynamic interference vector wi(t) to compose a widened dynamic interference feature matrix F in an external circulation mode, estimating an anti-interference right vector h, then using the anti-interference right vector h to perform the dynamic interference suppression on the receiving data. The high-dynamic interference auto-tracking steady suppression method has obvious good interference suppression effect, and can be applied to the space dynamical interference suppression, and the output signal to interference plus noise ratio thereof is more approximate to a theoretical optimal value.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and relates to array signal processing and self-adaptive filtering technology, which can be used for self-tracking and suppressing interference while ensuring stable signal output when interference moves in high dynamic space. Background technique [0002] The satellite navigation and positioning system can provide position, speed and time information all-weather and all-day, and has broad application requirements in the civil and national defense fields. However, due to the increasingly harsh electromagnetic environment and the very weak navigation signal reaching the receiver, the navigation receiver is extremely sensitive to interference, and this vulnerability to interference seriously affects the navigation performance. The high dynamic interference suppression that exists in practice is one of the main problems faced by adaptive anti-jamming. High dynamic interference here means ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/21
Inventor 曾操柴睿廖桂生李军何学辉陶海红杨志伟徐青
Owner 杭州拓扑视觉科技有限公司
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