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利用小波变换进行MC-MPSK信号载频盲估计

DOI: 10.13190/jbupt.200803.133.288, PP. 133-136

Keywords: 多载波多进制相移键控信号,载频估计,小波变换,相位噪声

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Abstract:

小波变换是在强噪声背景下进行信号时频分析的有效方法.利用小波变换的方法,使用Haar小波变换对多载波多进制相移键控(MC-MPSK)信号中心频率进行了估计.给出了计算机仿真的结果,将这种算法的估算结果与改进的克拉美-罗限(MCRB)进行了比较.结果表明,在没有先验知识的情况下,利用Haar小波变换方法可以精确的估计MC-MPSK信号中心频率,而且估计性能受相位噪声地影响不大.

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