Ultrashort wave data transmission receiving system based on software radio architecture and receiving method thereof

Abstract

The invention discloses an ultrashort wave data transmission receiving system based on a software radio architecture. The ultrashort wave data transmission receiving system comprises a radio-frequency device and a software radio module, wherein the radio-frequency device comprises a receiving module and a down-conversion module, and high-frequency analog signals are received through the receiving module and changed into medium-frequency analog signals in a down-conversion mode through the down-conversion module. The software radio module comprises an A / D conversion module, a digital down-conversion module, a demodulation module and a D / A conversion module. The A / D conversion module converts the medium-frequency analog signals into digital signals, the digital down-conversion module carries out down-conversion and multi-level decimation filtering on the digital signals to obtain baseband signals, and the baseband signals are demodulated through the demodulation module and converted into analog signals through the D / A conversion module to be output. The defects that a traditional radio station can only transmit AM and demodulate the signals in the single mode of a single side band are overcome, data transmission is diversified, and information including voice messages, images, faxes and the like is transmitted. The invention further discloses an ultrashort wave data transmission receiving method based on the software radio architecture.

Description

technical field [0001] The invention belongs to the field of radio communication, and in particular relates to an ultrashort wave digital transmission receiving system and a receiving method based on software radio architecture. Background technique [0002] The current emergency systems for offshore operations are mainly telephone communication systems and traditional radio receiving systems. In the case of telephone communication, once a natural combustion disaster or war occurs, when the optical cable is the main transmission medium and the mobile base station is damaged, the emergency command system will be paralyzed; most of the traditional radio receiving systems are based on analog hardware systems. In addition, the demodulation method Most of them use AM and SSB demodulation methods. The single demodulation method makes the receiving system only receive voice information, but cannot receive digital information such as complex images and faxes, which is inefficient. ...

AI Technical Summary

Problems solved by technology

However, due to the high frequency of the ultrashort wave emitted by the radio station, it is not suitable for demodulation and processing by digital circuits or software

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