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Cognitive waveform optimization processing method used for multi-transmission GMTI radar system

A processing method and technology of transmitting waveforms, which are applied in the field of radar and can solve problems such as difficult detection of targets

Active Publication Date: 2013-10-02
XIDIAN UNIV
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Problems solved by technology

This method uses the template designed according to the prior knowledge of the environment as a reference, and designs a filter that inversely matches the environment through iterative processing to improve the correlation between multiple channels, thereby improving the problem that the target is not easy to detect in the background of clutter and interference. , which improves the detection performance of the target

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  • Cognitive waveform optimization processing method used for multi-transmission GMTI radar system
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  • Cognitive waveform optimization processing method used for multi-transmission GMTI radar system

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Embodiment Construction

[0046] The present invention will be described in detail below in conjunction with specific embodiments.

[0047] Reference figure 1 with figure 2 The specific implementation steps of the present invention are as follows:

[0048] Step 1. Receive echo data X of multiple transmit waveforms;

[0049] Step 2. Recognize the environment and design a pulse compression reference template D that matches the environment inversely;

[0050] Step 3. Refer to the reference template to design an arbitrary waveform pulse compression filter that is inversely matched to the environment;

[0051] First set the initial parameters: given the main lobe area Ω (including L distance units), the expected information matrix C=span(x i )i∈Ω and the corresponding constraint value g. Where x i Is the i-th column vector of the received echo data matrix, span (·) represents the vector formed by the elements in the brackets. If the restricted main lobe range includes only one main peak point, then C=x 0 And g=1. ...

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Abstract

The invention discloses a cognitive waveform optimization processing method used for a multi-transmission GMTI (Ground Moving Target Indication) radar system. The method comprises the steps that a distance unit to-be-detected is set as a desired signal; information of a distance unit adjacent to the distance unit to-be-detected is regarded as an interference signal; based on a weight of an initial pulse pressure filter, an initial time domain response output result is obtained; according to prior information, artificial interference is added to a sidelobe area of the initial time domain response output result; a weight of the pulse pressure filter next time is optimally designed by controlling power of the artificial interference; a time domain response diagram inversely matched with an environment is obtained after repeated iterations, that is a low sidelobe is formed in a place with stronger clutter interference; and a higher sidelobe is formed in a place with weaker or no clutter interference. The filter designed by the method takes a template designed according to environment prior knowledge as a reference, the low sidelobe is designed in a strong clutter area, and the high sidelobe is designed in a weak or no clutter area, so that the filter has the adaptive capability, and can inhibit clutter better.

Description

Technical field [0001] The present invention belongs to the field of radar technology, and relates to a design method of an adaptive pulse compression filter based on prior environmental knowledge in the field. The present invention can be applied to pulse compression processing of inverse matching of arbitrary waveforms with arbitrary environments, and can also be applied to Separate the pulse compression information of each waveform in the case of multiple transmission waveforms. The filter is designed with reference to the template that is inversely matched with the environment, so it can better suppress clutter and improve the detection performance of the target. Background technique [0002] The cognitive system is to feed back the information extracted from the echo to the transmitter through learning of the target and the environment, forming a closed loop system, and then the transmitter adaptively optimizes the design of a new transmission signal according to the environ...

Claims

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Application Information

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IPC IPC(8): G01S7/36
Inventor 陶海红徐磊黎薇萍胡跟运王兰美张金泽曾操廖桂生朱圣棋李军杨志伟
Owner XIDIAN UNIV
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