function函数，实现8PSK调制，包括相位映射、成形滤波、载波调制，语句格式规范，含有注释，运行可用(this is a function to realize 8PSK modulation,including phase mapping, shaping filtering, carrier modulation,Statement format specification, containing annotations, running available)

8PSK 是一种相位调制算法。相位调制（调相）是频率调制（调频）的一种演变，载波的相位被调整用于把数字信息的比特编码到每一词相位改变（相移）。(8PSK is a phase modulation algorithm. Phase modulation (phase modulation) is an evolution of frequency modulation (frequency modulation), and the phase of the carrier is adjusted