The requirements for modulation techniques to digital mobile communication system are presented and the improved lineally digital modulation schemes are also briefly described.
本文讨论了数字移动通信系统对调制技术的要求，着重分析了数字线性调制及其改进方案。
Modulation techniques for transmitting digital information in which that information conveyed by selecting discrete phase changes of the carrier.
借助所选择的 离散的载波相位变化来传输数字 信息的调制技术。
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