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