7.1 概述7.2 二进制数字调制7.3 二进制数字调制系统的性能比较7.4 多进制数字调制系统第 7 章 数字调制技术Digital Data Analog SignalTreat transmission and reception as digitizedAmplitude Shift Keying (ASK)Phase Shift Keying (PSK)Freq. Shift