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Multi-beam passive monopulse angle measurement method based on digital array

A single-pulse angle measurement, digital array technology, applied in direction finders using radio waves, radio wave direction/bias determination systems, etc. , the effect of a high degree of adaptation

Pending Publication Date: 2020-06-05
NO 8511 RES INST OF CASIC
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Problems solved by technology

However, this method has a high amount of calculation and is easily affected by the non-ideal factors of the array, which leads to many difficulties in the practical application of spatial spectrum estimation in electronic warfare.

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  • Multi-beam passive monopulse angle measurement method based on digital array
  • Multi-beam passive monopulse angle measurement method based on digital array
  • Multi-beam passive monopulse angle measurement method based on digital array

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Embodiment Construction

[0014] The present invention will be described in further detail below with reference to the accompanying drawings.

[0015] combine figure 1 , a digital array-based multi-beam passive monopulse angle measurement method according to the present invention includes the following steps:

[0016] Step 1, the electronic reconnaissance equipment performs digital simultaneous multi-beam processing on the multi-array metadata to complete the signal interception in the designated airspace, as follows:

[0017] 1a) The electronic reconnaissance equipment samples the received echo of the N-element linear array to obtain the echo data vector x k , where x k is an N×1-dimensional vector, the subscript k represents the sampling time, k=1,...,K, K is the total sampling point in the time period;

[0018] 1b) Evenly sample M points within the airspace coverage required by the reconnaissance system to obtain a set of beam pointing points [θ 1 ,…,θ M ];

[0019] 1c) Using the beam pointing...

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Abstract

The invention discloses a multi-beam passive monopulse angle measurement method based on a digital array, and aims to improve the robustness of a traditional multi-beam amplitude comparison directionfinding method. The method comprises the specific steps that step 1, electronic reconnaissance equipment carries out digital simultaneous multi-beam processing on multi-array-element data, and signalinterception of a specified airspace is completed; step 2, threshold detection is carried out on the data of the multiple beams, and a beam sequence number and a moment sequence number corresponding to the target are determined; and step 3, the data with the target is processed by adopting a passive self-adaptive monopulse method to obtain the angle value of the target. The precision and the robustness of the traditional multi-beam amplitude comparison direction finding method are improved, and the direction finding capability of the electronic reconnaissance equipment is improved.

Description

technical field [0001] The invention relates to an electronic reconnaissance passive direction finding technology, in particular to a multi-beam passive monopulse angle measurement method based on a digital array. Background technique [0002] Passive direction finding technology is a technology that does not need to emit electromagnetic waves autonomously, and completely relies on passively receiving electromagnetic waves from radiation sources to measure the target azimuth. Passive direction finding technology has good stealth performance because it emits electromagnetic waves involuntarily. At the same time, it also has the advantages of long detection distance, high safety performance, and concealed reception of electromagnetic waves. It is an important part of modern air defense early warning system. Especially in the case of the rapid development of modern stealth technology, ultra-low-altitude penetration technology, anti-radiation missile technology and electronic in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 姜磊王琦叶自强佘季黄金刚郝栓柱吴明宇刘俊李佳林姚高军
Owner NO 8511 RES INST OF CASIC
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