说明：  滚降系数为0.5的升余弦滚降系统的时域波形，二进制序列经过滚降系统后输出，画出输出端信号的时域波形和眼图。
(Roll-off factor of 0.5 Raised Cosine system in time domain waveforms, binary sequence through the roll-off system after the output, draw the time-domain output signal waveform and eye diagram.)