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-This is a receiver system, the signal is given in detail the generation, modulation, transmit, receive, demodulation and other environment, a good example
English Description：
This is a receiver system, the signal is given in detail the generation, modulation, transmit, receive, demodulation and other environment, a good example