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Daubechies小波在PSK码元速率测量中的应用

于 2022-03-13 发布 文件大小:10.86 kB
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随着科技的发展,电子设备的被应用日常生活的各个领域。在人类生存的空间中充满了形形色色的不同频率、调制方式的无线信号。在不同的领域码元速率具有不同的意义,例如民用通信中的一些无线信号的速率和调制方式都是可以预知的,然而在军事作战、电子对抗等领域却并非如此,一个良好的保密性在现代化的军事领域显得尤为重要。为了正确获取有用信息,码元速率测量是一重要步骤,倘若知道码元速率,就有助于分析码元的调制类型,进而获取通信信息。利用小波变换的特性提取信号瞬时突变信息,来分析码元速率是一种极为有效的手段。 PSK调制方式在目前的通信领域被广泛使用,现代军事对抗中获取不同制式的码元速率是截取有效信息的关键。传统的获取码元速率过程需要载波频率和相位等信息。然而小波变换非常适用于提取相位突变和瞬间变化信息。通过分析PSK信号的峰峰值可以得出码元的速率。

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