The application prospects of wireless weather fax software receiver are expounded, and the overall structure of weather fax software receiver and the important role of demodulation module in it are analyzed; according to the relevant specifications of the World Meteorological Organization on wireless weather fax transmission, the digital orthogonal demodulation method is used to demodulate the weather fax signal, and the accuracy and feasibility of the demodulation algorithm are verified by Matlab simulation; then VC++ is used to reprogram the algorithm and integrate it into the wireless weather fax receiving software; the final software test shows that the software receiver system using the orthogonal demodulation method is stable, the demodulation is fast and accurate, and the scalability is strong, which meets the expected development indicators of the wireless weather fax machine.
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