在Visual c++下可对串口和MODEM进行操作,并能用ZOMDEM协议进行收发文件的程序－C语言-In the Visual c++ Can be carried out on the serial port and MODEM operation and can be used to send and receive documents ZOMDEM agreement procedure-C Language

4QAM解调程序，C语言编写实现，对于研究软件解调的人员有较大参考价值-4QAM demodulation process, C language realization of the research staff of the software demodulator reference value greater