Signal processing circuit of very high frequency aeronautical communication land radio station terminal module

The utility model discloses a signal processing circuit of a very high frequency aeronautical communication land radio station terminal module. The signal processing circuit comprises a medium frequency analog/digital (A/D) converter, a digital signal processing chip digital signal processor (DSP), a field-programmable gate array (FPGA), an audio frequency A/D converter, an audio frequency processing unit and an audio frequency digital/analog (D/A) converter. The input end of the medium frequency A/D converter is connected with a medium frequency signal, the output end of the medium frequency A/D converter is connected with the DSP, the audio frequency output end of the DSP is connected with the FPGA, the audio frequency input/output end of the FPGA is connected with the audio frequency A/D converter, the other audio frequency output end of the GPGA is connected with the audio frequency D/A converter, the audio frequency A/D converter is connected with the audio frequency processing unit, the input end of the audio frequency processing unit is connected with a voice pickup, and the output end of the audio frequency processing unit is connected with a loudspeaker. The DSP and the FPGA are used for processing signals, whether signals processed by the FPGA are output is decided by a silencing indication signal, accuracy of output signals is improved, and the whole circuit is simple in structure.