Interferometer Direction Finding Method Based on Chinese Remainder Theorem

A technology of Chinese remainder theorem and interferometer, which is applied in the directions of orientators, instruments, and measuring devices for measuring directions, can solve problems such as phase ambiguity and failure to meet the application requirements of electronic countermeasures, and achieve accurate correction, strong engineering realizability, and The effect of guaranteeing accuracy

Active Publication Date: 2012-05-16
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

However, when the form of the antenna array element and the size of the array are fixed, for example, due to the influence of the design size of the antenna element, the distance between the centers of the two antenna elements (that is, the minimum short baseline) is still greater than half the wavelength of the incident signal. , the traditional long and short baseline direction finding system will not be able to solve the phase ambiguity problem, and cannot meet the application requirements of engineering direction finding in electronic countermeasures

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  • Interferometer Direction Finding Method Based on Chinese Remainder Theorem
  • Interferometer Direction Finding Method Based on Chinese Remainder Theorem
  • Interferometer Direction Finding Method Based on Chinese Remainder Theorem

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Embodiment Construction

[0042] refer to Figure 1 to Figure 3 , the principle block diagram of the embodiment of the present invention is as follows figure 1 As shown, it consists of an antenna array 1, a field amplifier filter unit 2, a switch matrix 3, and a direction-finding receiver 10, in which a self-calibration source 4, an analog channel 5, a sampling memory 6, a direction-finding processing unit 7, and a monitoring computer 8 , the synthesizer 9 constitutes a direction finding receiver 10 . The direction-finding receiver 10 of the present invention receives the monitoring computer 8 self-calibration instruction, controls the switching matrix 3 to the self-calibration state, controls the self-calibration source 4 to output four-way self-calibration signals, and the sampling memory 6 synchronously samples the four-way self-calibration signals The sampling data is directly subjected to FFT calculation, and the self-calibration data is sent back to the direction-finding processing unit 7, and f...

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Abstract

The invention discloses an interferometer direction finding method based on the Chinese remainder theorem, which relates to an interferometer direction finding technology in the field of radio direction finding. In the case that the antenna shape and array size are fixed, the present invention uses the Chinese remainder theorem to design an antenna array form with the best performance, which solves the phase ambiguity problem; and adopts long and short baseline matching step by step and virtual array processing technology to effectively expand the The equivalent baseline length improves the accuracy of direction finding. The equipment manufactured by the invention has the advantages of simple operation, reliable performance, convenient algorithm, high precision of direction finding and the like. It is especially suitable for accurate direction finding and positioning for radiation sources such as communication, radar, and measurement and control in the detection equipment in the field of military electronic countermeasures.

Description

technical field [0001] The invention relates to a long-short baseline matching interferometer direction-finding method in the field of radio direction-finding, and is particularly suitable for precise direction-finding and positioning of radiation sources such as radar, communication, and measurement and control in the field of military electronic countermeasures. Background technique [0002] Interferometer direction finding has the advantages of being suitable for various antenna array forms and high direction finding accuracy. It is the most widely used direction finding system in passive direction finding technology at present. In order to improve direction finding accuracy, it is often necessary to extend the baseline length between antenna arrays. But when the baseline exceeds half the wavelength of the incident signal, there will be a problem of phase difference ambiguity. By using the method of combining long and short baselines, high direction finding accuracy can ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/46
Inventor 张海瑛蔡忠伟安效君周涛冉战胜李少朋
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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