Maritime digital intermediate frequency receiving equipment

A receiving device, digital intermediate frequency technology, applied in the direction of digital transmission system, multi-frequency code system, broadcast specific application, etc., can solve the problems of long reception time, low transmission data rate, inability to receive other types of files, etc. The effect of improving reception rate, high sensitivity, and large dynamic range characteristics

Active Publication Date: 2019-05-17
SHANGHAI ADVANCED AVIONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current receiving equipment can only receive, analog modulation (F1B) information, the transmission data rate is low (only 50bps), the receiving time is long, the receiving file type is single, etc. (text), and cannot receive other types of files, etc.
Cannot meet the requirements of modern data transmission

Method used

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  • Maritime digital intermediate frequency receiving equipment
  • Maritime digital intermediate frequency receiving equipment
  • Maritime digital intermediate frequency receiving equipment

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] figure 1 It is a structural schematic diagram of the marine digital intermediate frequency receiving equipment of the present invention.

[0032] See figure 1 , The marine digital intermediate frequency receiving equipment provided by the present invention is composed of an antenna module, a radio frequency signal processing module, a digital signal processing module, a positioning module, a storage unit, an external interface unit, a display unit, and a power supply module. The main functions of each module are as follows:

[0033] 1) Antenna module: within the coverage of the signal, the antenna receives the modulated signal. For example: Whip Antenna, Magnetic Rod Antenna, Loop Antenna, etc.

[0034] 2) RF signal processing module: filter and amplify the signal received by the antenna, automatic gain control, etc., perform signal change pr...

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PUM

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Abstract

The invention discloses seaborne digital intermediate frequency receiving equipment comprising a radio frequency signal processing module and a digital signal processing module, wherein the radio frequency signal processing module is connected with an intermediate frequency receiving antenna; the digital signal processing module comprises a DSP processor and a FPGA processor; the radio frequency signal processing module converts the frequency of a signal from the intermediate receiving antenna and then sends the signal into the FPGA processor via an analog-digital conversion unit; the FPGA sends the signal to the DSP processor to complete a synchronous balanced demodulation operation after completing frequency conversion under NCO and matched filtering, and then performs LDPC decoding via the FPGA processor. The seaborne digital intermediate frequency receiving equipment provided by the invention is greatly improved in receiving rate, has the characteristics of high sensitivity and large dynamic range, effectively reduces interference between carriers and improves spectrum efficiency, and meets the requirement of adaptively receiving different formats of seaborne security information, documents and electronic charts.

Description

technical field [0001] The invention relates to a radio frequency receiving device, in particular to a marine digital intermediate frequency receiving device. Background technique [0002] NAVDAT is a new type of shore-based maritime digital broadcasting system, which uses the latest digital transmission technology to broadcast maritime safety information and other service information on 500kHz. NAVDAT realizes the rapid push of navigation-related safety information such as chart correction information by broadcasting messages, texts, files or images, and realizes seamless connection with ship information systems. The NAVDAT system broadcasts through the network, and can also realize the coverage of the A2 sea area. Therefore, NAVDAT can enhance maritime information business capabilities and is a key system in GMDSS modernization and e-navigation. [0003] The NAVDAT digital broadcast system mainly relies on ionospheric transmission, provides broadcast transmission service...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/04H04H20/61H04L27/26
CPCH04B1/04H04H20/61H04L27/2626
Inventor 郑德福陈涤非汤可成高万明
Owner SHANGHAI ADVANCED AVIONICS
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