某数据传输系统，试图利用300-3400Hz的话音通 道进行载波传输，波形信道为加性高斯白噪声信道。 –采用线性传输，收发两端拟采用滚降系数0.5的根 号升余弦滤波，以解决采样点失真问题。 –以下仿真采用无记忆采样信道模型，其中受器件限 制，复基带采样点平均功率受限为1，复基带采样 点噪声功率为可调参量-A data transmission system, trying to use 300-3400Hz voice channel for carrier transmission, waveform channel for the additive Gauss white noise channel.- using linear transmission, the transmission and receiving ends of the two ends of the line to be used to raise the root number of 0.5 cosine filter, in order to solve the problem of sampling points. The following simulation uses the non memory sampling channel model, which is limited by the device, and the average power of the complex baseband sampling point is 1, and the noise power of the complex base band is adjustable.