基于波形评价准则的相位补偿方法  

Phase compensation method based on waveform evaluation criterion

作　　者：丁健[1] 朱丰[2] 杨璐[3] 张宏斌[4] 

机构地区：[1]滁州学院 [2]北京军区空军政治部 [3]中国人民解放军91053部队 [4]中国人民解放军93508部队

出　　处：《量子电子学报》2015年第4期399-406,共8页Chinese Journal of Quantum Electronics

基　　金：安徽省自然科学基金(1308085MF92);安徽省优秀青年人才基金重点项目(2013SQRL093ZD);滁州学院科研项目(2014qd025)

摘　　要：针对间断的单、双频信号如何进行有效相位补偿的问题展开研究。通过严格的理论推导给出了信号相位精确补偿的所需条件,即间断的单频信号可无条件进行精确补偿,间断的双频信号可在两个频率差与采样时间间隔之积为整数的条件下进行精确补偿。针对无法精确补偿的情形,提出了基于波形评价准则的近似补偿方法,并通过仿真实验比较了四种不同波形评价准则的近似补偿效果。实验结果不仅证明了此理论和方法的有效性,同时还表明,基于波形指数熵、能量对比度准则的近似补偿效果更优,补偿后信号的频谱图峰值更高。Effective phase compensation of the incomplete single and double frequency signal was investigated effectively.The necessary condition for exact phase compensation of signal was deduced and testified theoretically.That is,exact phase compensation can be executed for the incomplete single frequency unconditionally.And it can be executed for the incomplete double frequency on condition of that the multiply of difference from the two frequencies of the signal and sampling time interval is an integer.Because the exact phase compensation can＇t be carried out,the approximate compensation method based on waveform evaluation criterion was proposed.By simulation,the different compensation effects based on four different criterions were compared.The results proved that the deduced theory and proposed method are valid,and the compensation effect based on waveform exponent entropy or energy contrast criterion is better than that of other,and the peak of frequency spectrogram is higher than that of other.

关 键 词：信息处理 单、双频信号 补偿原理 相位 频谱图 波形评价准则 

分 类 号：TN957[电子电信—信号与信息处理]