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Dual-mode voice demodulation equipment

A demodulation device and dual-mode technology, applied in electrical components, transmission systems, etc., can solve problems such as single function, limited demodulation frequency range, and inability to cover frequency bands, and achieve improved efficiency and fine frequency domain demodulation resolution Effect

Inactive Publication Date: 2015-03-18
SHANGHAI TERJIN INFORMATION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing voice demodulation equipment either has a limited demodulation frequency range and cannot cover the frequency band of 88-138MHz, or has a single function and cannot simultaneously demodulate FM and AM voice modulation signals

Method used

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  • Dual-mode voice demodulation equipment
  • Dual-mode voice demodulation equipment
  • Dual-mode voice demodulation equipment

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Embodiment Construction

[0025] In order to further explain the technical means and functions adopted by the present invention to achieve the intended purpose, the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0026] A kind of dual-mode speech demodulation equipment of the embodiment of the present invention, such as figure 1 As shown, it includes the following components: antenna unit 100 , superheterodyne double conversion receiving unit 200 , FM demodulation unit 300 , AM demodulation unit 400 , audio selection output unit 500 and control unit 600 .

[0027] The antenna unit 100 inputs the received radio signal of 88-138MHz into the superheterodyne secondary frequency conversion receiving unit 200, and the superheterodyne secondary frequency conversion receiving unit 200 performs frequency conversion processing on the radio signal under the control of the control unit 600 and divides it into two One path is demodulated...

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Abstract

The invention discloses dual-mode voice demodulation equipment. An antenna unit inputs a received radio signal of 88-138MHz into a superheterodyne double-conversion receiving unit; conversion processing is performed on the radio signal by the superheterodyne double-conversion receiving unit under the control of a control unit, so that the radio signal is divided into two paths; one path is demodulated to acquire an FM audio signal by virtue of an FM demodulation unit; the other path is demodulated to acquire an AM audio signal by virtue of an AM demodulation unit; and an audio output unit selectively outputs the FM audio signal or the AM audio signal under control of the control unit. According to the dual-mode voice demodulation equipment disclosed by the invention, a voice signal at a certain frequency point in the range from 88MHz to 138MHz can be simultaneously subjected to FM voice demodulation and AM voice demodulation, so that direct decision basis and parameters are provided for interference analysis between frequency modulation broadcasting and very high frequency ground-to-air communication, and the interference analysis efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a dual-mode voice demodulation device. Background technique [0002] With the development of FM broadcasting business and civil aviation business, the interference of 88-108MHz FM broadcasting to civil aviation navigation and 118-138MHz VHF ground-to-air communication is becoming more and more serious. In some areas, it has even seriously interfered with the safe operation of civil aviation. The demand for equipment and methods for interference detection and analysis is increasing day by day. Since broadcasting is FM modulation, and VHF ground-to-air communication is AM modulation, if FM and AM voice demodulation can be performed simultaneously at a certain frequency point, by analyzing the demodulated voice quality, it can directly provide interference analysis. Judgment basis and parameters, thus greatly improving the efficiency of interference analysis. Existi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/00H04B1/16
Inventor 姜化京海霞安诺姜维左涛任仪
Owner SHANGHAI TERJIN INFORMATION TECH CO LTD