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本文从调制域角度分析了基于PLL激励的无线寻呼信号的数字调频特性:发现PLL锁定状态下的频率跟踪特性对数字调频有一定影响,阐述了这种影响造成无线寻呼系统误码的机理,最后,本文提出了“动态调整PLL中心频点”的方法。
In this paper, the frequency modulation characteristics of radio paging signals based on PLL excitation are analyzed from the perspective of modulation domain. It is found that the frequency tracking characteristics under the PLL lock state have an impact on the digital frequency modulation. The mechanism that causes such errors is caused by the radio paging system Finally, this paper presents a method of “dynamically adjusting the PLL center frequency”.