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Marine digital Loran-C module

A marine, matching module technology, applied in instruments, measurement devices, radio wave measurement systems, etc., can solve the problems of slow processing speed and poor signal quality, and achieve the goal of improving speed, improving restoration quality, and suppressing the influence of interference and noise. Effect

Inactive Publication Date: 2019-11-12
TIANJIN NAVIGATION INSTR RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the ground facilities have been relatively mature after years of construction, but the receivers used on ships usually use analog signal processing. Due to transmission distance, noise interference, etc., there are slow processing speeds, and the signal quality is poor due to the influence of interference and noise. And other issues

Method used

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  • Marine digital Loran-C module
  • Marine digital Loran-C module
  • Marine digital Loran-C module

Examples

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Embodiment Construction

[0022] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] A marine digital Roland C module is composed of a radio frequency front-end circuit connected with a digital signal processing circuit, and positioning and timing software is installed in the digital signal processing circuit to provide navigation positioning and timing functions.

[0024] Such as figure 1 As shown, the RF front-end circuit includes an antenna input matching module, an active filter and an LC filter connected in sequence. The input end of the antenna input matching module is connected to the antenna (coupler), and the output end of the LC filter is connected to the digital signal processing circuit. The antenna input matching module is composed of a DC blocking capacitor, AC coupling and impedance matching, and the DC blocking capacitor blocks the DC part of the antenna coupler output signal outside the channel to adapt...

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Abstract

The invention relates to a marine digital Loran-C module. The technical characteristic is that the marine digital Loran-C module consists of a radio frequency front-end circuit and a digital signal processing circuit, wherein the radio frequency front-end circuit comprises an antenna input matching module, an active filter and an LC filter, which are connected in sequence; the input end of the antenna input matching module is connected with an antenna; the output end of the LC filter is connected with the digital signal processing circuit; the digital signal processing circuit comprises an analog-digital conversion module, a signal processing module, a configuration logic module and a positioning and timing resolution module; the signal processing module is used for realizing a digital filter processing function for input signals and a signal recognizing and tracking function for Loran-C signals; the configuration logic module is connected with the signal processing module, the positioning and timing resolution module and an external interface circuit; and the positioning and timing resolution module is provided with positioning and timing software. The marine digital Loran-C module is reasonable in design and is capable of improving the signal processing speed and signal restoration quality and effectively restraining the influences of the interferences and influences.

Description

technical field [0001] The invention belongs to the technical field of shore-based long-distance radio navigation, in particular to a marine digital Loran C module. Background technique [0002] The Changhe-2 navigation system, known internationally as the Roland C system, is the only large-scale shore-based long-range radio navigation system in my country. It is mainly responsible for providing navigation and positioning services and other professional tasks for maritime ship activities. [0003] The Roland C system is a medium and long-range precision hyperbolic radio navigation system. In the field of radio navigation, it belongs to the land-based, low-frequency, pulse-phase navigation system. The Roland C system is mainly composed of ground facilities and receivers. At present, the ground facilities have been relatively mature after years of construction, but the receivers used on ships usually use analog signal processing. Due to transmission distance, noise interfere...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/12G01S5/02
CPCG01S5/12G01S5/0205
Inventor 马若顺王琳吴穹张崇猛
Owner TIANJIN NAVIGATION INSTR RES INST