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All-digital short wave exciter for voice signal modulation

A voice signal, all-digital technology, applied in a variety of modulation transmitter/receiver arrangements, AM carrier systems, etc., can solve the problem of a single modulation mode of the signal, unable to meet the needs of modern short-wave radio stations, etc.

Active Publication Date: 2015-05-13
BEIHANG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the transmission of signals in traditional short-wave radio stations mostly adopts a single modulation mode, which can no longer meet the needs of modern short-wave radio stations.

Method used

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  • All-digital short wave exciter for voice signal modulation
  • All-digital short wave exciter for voice signal modulation
  • All-digital short wave exciter for voice signal modulation

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Embodiment Construction

[0091] The present invention will be described in detail below with reference to the accompanying drawings.

[0092] Such as figure 1 As shown, the present invention is an all-digital shortwave exciter for voice signal modulation, which is composed of four parts, including: front-end analog-to-digital conversion A / D 01, digital signal processing unit 02, digital up-conversion module 03 and Hardware module 07, the positional connection relationship and signal direction between them are: the output of the front-end analog-to-digital conversion A / D 01 is connected to the digital signal processing unit 02, and the output of the digital signal processing unit 02 is connected to the digital up-conversion module 03; The trend is that the input signal first enters the front-end analog-to-digital conversion A / D 01, and the signal sampled by the front-end analog-to-digital conversion A / D 01 enters the digital signal processing unit 02 for preprocessing, and the signal processed by the d...

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Abstract

Disclosed is an all-digital short wave exciter for voice signal modulation. The all-digital short wave exciter for voice signal modulation comprises a front-end analog-digital conversion A / D module, a digital signal processing unit, a digital up-conversion module and a hardware module. The output of the front-end analog-digital conversion A / D module is connected to the digital signal processing unit, and the output of the digital signal processing unit is connected to the digital up-conversion module. Firstly, an input signal enters the front-end analog-digital conversion A / D module, the signal which is sampled by the front-end analog-digital conversion A / D module enters the digital signal processing unit to be preprocessed, the signal which is processed by the digital signal processing unit enters the digital up-conversion module to be processed in an up-conversion mode, the output signal which is processed by the digital up-conversion module enters the hardware module to be processed through filtering and amplification, and the output signal processed by the hardware module serves as the output of the all-digital short wave exciter. The digital signal processing unit is implemented in an FPGA, and the digital up-conversion module is implemented through part of functions of AD9788.

Description

technical field [0001] The invention relates to a short-wave exciter, in particular to an all-digital short-wave exciter for voice signal modulation, which is used to realize the modulation of input voice signals, and belongs to the technical field of short-wave communication. Background technique [0002] In recent years, with the advancement of wireless and wired communication technology, satellite communication and optical fiber communication have become the mainstream of the communication market due to their good communication quality and high communication speed. However, satellite communication and optical fiber communication require the construction of a large amount of infrastructure, such as base stations, satellite ground stations, relay stations, and communication cables. This leads to high input costs, inability to maneuver flexibly, and poor resistance to destruction during wartime. On the contrary, short-wave communication relies on ionospheric communication, ...

Claims

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Application Information

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IPC IPC(8): H04L27/02
CPCH04L27/0008H04L27/02
Inventor 谭思玚冯文全刘苏潇张杰斌赵洪博
Owner BEIHANG UNIV
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