1 采用正弦波，方波进行同步调制，实现调制信号、已调信号、解调信号的波形、频谱以及解调器输入输出信噪比的关系。

2 采用Verilog语言编写有符号的五位乘法器

3 实现数字与模拟调制-A sine wave, square wave synchronous modulation to achieve the modulation signal, the modulated signal, the demodulated signal waveform, spectrum and signal to noise ratio of the demodulator input and output relationship. 2 using Verilog language has signed five digital and analog multiplier 3 modulation