中文说明：
这是一个接收机系统，详细的给出了信号的产生，调制，发射，接收，解调等环境，很好的例子。
English Description：
This is a receiver system. It gives the environment of signal generation, modulation, transmission, reception and demodulation in detail. It is a good example
The receiver system gives the environment of signal generation, modulation, transmission, reception
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中文说明：
这是一个接收机系统，详细的给出了信号的产生，调制，发射，接收，解调等环境，很好的例子。
English Description：
This is a receiver system. It gives the environment of signal generation, modulation, transmission, reception and demodulation in detail. It is a good example