Short-wave radio frequency digital processing module

Abstract

The invention discloses a short-wave radio frequency digital processing module which mainly comprises a receiving radio frequency analog front end, a receiving radio frequency digital front end and an emission submodule, wherein the receiving radio frequency analog front end comprises a harmonic filter, a broadband low-noise amplifier with automatic gain control (AGC) and a low-pass filter; the receiving radio frequency digital front end comprises an analog / digital (A / D) conversion circuit, a digital down converter (DDC), a direct digital frequency synthesizer (DDS) and a digital signal processor (DSP); and the emission submodule comprises a digital / analog (D / A) conversion circuit, a digital up converter (DUC), a DDS and a DSP. The short-wave radio frequency digital processing module of the invention can simplify the design structure of a shortwave radio station, reduces the types of radio stations, improves the service life of the digital shortwave radio station, and reduces the input cost of users.

Description

technical field [0001] The invention relates to the technical field of radio frequency digital processing, in particular to a short-wave radio frequency digital processing module. Background technique [0002] The wireless electromagnetic wave frequency with a frequency range between 1.6MHz-30MHz is usually called the shortwave frequency band, which uses shortwave frequency for worldwide broadcast transmission for one-way communication, usually called shortwave broadcast; a radio that can receive a certain frequency above is called For short wave radio. The history of human beings using wireless communication including short-wave broadcasting is only about 100 years. However, after decades of development of wireless communication technology, a wireless communication network with satellite communication and mobile communication as the main symbol has been formed. . Since short-wave communication mainly relies on the back and forth reflection and refraction between the ionos...

AI Technical Summary

Problems solved by technology

In the digitalization process of short-wave radio stations, the digital technology of its channels is particularly critical. The existing channel digital technology for short-wave radio stations is limited to the processing of intermediate frequency signals, and analog processing is still used above intermediate frequencies, so it is not a real software radio technology ( SDR) radio station, its disadvantage is that it does not support multi-waveform, multi-mode and multi-service, thus limiting the development and application of short-wave communication

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