数字调制器的墓本构建模块是函数random-binary，它产生电平值为+1或一1的二进制波形，产生的比特数以及每比

特的采样数是该函数的参数。函数random-binary可以仿真多个数字调制器，例如，可用如下MATLAB语句仿真一个QPSK调制器:

下列MATLAB程序产生一个长10比特的QPSK信号,采样频率为每比特8个采样点:

-Digital modulator building blocks of the tomb is a function of the random-binary, it produces a value of+1 level or a 1 binary waveform, resulting in the number of bits and a sampling of each number of bits is the function parameters. Function of random-binary can simulate the multiple digital modulator, for example, can be used as MATLAB simulation of a QPSK modulator statement: The following MATLAB program to generate a long 10-bit QPSK signal, the sampling frequency for each 8-bit sampling points: