Single-channel radiolocation direction-finding system direction-finding method thereof

A radio positioning and direction-finding system technology, which is applied to radio wave measurement systems, direction-determining orientators, and measuring devices, can solve the problems of high cost, complex structure, large volume and weight, etc., to improve reliability and improve Effects on direction finding accuracy, reduced complexity and cost

Inactive Publication Date: 2012-07-11
SHANGHAI RADIO EQUIP RES INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a single-channel radio positioning and direction-finding system and its direction-finding metho

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  • Single-channel radiolocation direction-finding system direction-finding method thereof
  • Single-channel radiolocation direction-finding system direction-finding method thereof
  • Single-channel radiolocation direction-finding system direction-finding method thereof

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Embodiment Construction

[0022] In the following, the present invention will be further described by taking the maritime personal emergency position indication and tracking device as an example in conjunction with the accompanying drawings and specific embodiments:

[0023] The maritime personal emergency position indication and tracking equipment is mainly composed of two parts: a personal portable beacon machine and a ship (aircraft) search machine. The search machine is installed on the search and rescue helicopter and the search and rescue ship, and the beacon machine is carried by the crew. After the crew falls into the water, the beacon machine can send out a radio beacon signal, and the airborne or shipborne search machine can determine the location of the caller based on this signal and implement rapid rescue. In order to enhance the search and rescue effect, the beacon machine can also emit light and sound to attract the attention of rescuers in close range situations and in the dark. The be...

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Abstract

The invention relates to the field of radiolocation direction-finding systems, and aims to provide a single-channel radiolocation direction-finding system and a direction-finding method thereof to reduce cost and improve direction-finding accuracy. The single-channel radiolocation direction-finding system is characterized by comprising a direction-finding antenna array, a single-channel receiver with the functions of filtration, amplification, frequency conversion and amplitude limitation, and a direction-finding microprocessor for A/D sampling and digital signal processing, wherein the direction-finding antenna array mainly comprises N identical antenna units which are arranged on the circumference of a concentric circle, wherein N is greater than or equal to 3; and each antenna unit is connected with the single-channel receiver through a radio-frequency electronic switch. The invention utilizes a single-channel radio direction-finding technology combined with a phase interference method and a Doppler direction-finding principle, and only needs one single-channel receiver with the functions of filtration, amplification, frequency conversion and amplitude limitation, thereby reducing the complexity and the cost of equipment, improving reliability, reducing the calculated amount of back-end signal processing, and improving direction-finding accuracy.

Description

Technical field: [0001] The invention relates to the field of radiolocation and direction finding systems. Background technique: [0002] The traditional radio positioning and direction-finding system mainly consists of the following parts: direction-finding antenna array, multi-channel receiver, and direction-finding microprocessor. Usually, the number of elements of the direction-finding antenna array determines the number of channels of the receiver, that is, the signal received by each antenna element must pass through the receiver separately, and the receiver performs filtering, amplification, frequency conversion, and amplitude limiting; Then it is sent to the direction finding processor, and digital signal processing is performed after A / D sampling. The multi-channel receiver transforms and amplifies the signal received by the antenna. In the process of transforming and amplifying, the relative relationship between the phase and amplitude of the antenna signal should...

Claims

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Application Information

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IPC IPC(8): G01S3/46
Inventor 严鹏严小商张海霞
Owner SHANGHAI RADIO EQUIP RES INST
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