An all-digital shortwave exciter for voice signal modulation

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, ...

AI Technical Summary

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.

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