求翻译：本文用键控法调制数字信号，对已调信号的解调则采用相干检测法。通过使用MATLAB提供的函数，其中包括调制函数dmod和解调函数ddemod，编写程序实现数字信号的2ASK、2FSK和2PSK的调制与解调。接着运用GUIDE创建数字调制解调仿真界面，通过这个界面，能设置随机生成的二进制码元数以及载波的频率，还可以选择数字调制解调的方式。同时能在坐标轴对象中显示调制与解调的时域图形。通过这个可视化仿真界面，能快速的在三种调制解调方式当中切换，完成对它们的分析。是什么意思？

Keying modulation digital signal modulated signal demodulator uses coherent detection method. Through the use of Matlab provide function, including a the modulation the function dmod and demodulation function ddemod writing programs to achieve the digital signal 2ask, 2fsk and the 2psk modulation an

This article by keying modulation, and digital signal has been adjusted to the demodulation signal is detected with nothing. By using the functions provided MATLAB, including modulation function and dmod ddemod function, write a program for the digital signal 2, 2 FSK ASK PSK and 2 of the modulation

This article with the keying method modulation digital signal, to has adjusted the signal the demodulation to use the coherent examination law.Through uses the function which MATLAB provides, including modulation function dmod and demodulation function ddemod, compilation procedure realization digit

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