基于小波Fisz变换的X射线脉冲星信号降噪研究

发布时间：2018-04-17 05:13

  本文选题：光子序列 + 降噪　； 参考：《光子学报》2014年12期

【摘要】：针对X射线脉冲星信号信噪比低,难以获取精确脉冲星信号相位的问题,提出了基于WaveletFisz变换的X射线脉冲星信号的估计方法.根据X射线脉冲星信号特性建立了信号模型,推导了Wavelet-Fisz变换理论,利用该变换将X射线脉冲星信号逼近于高斯分布,对变换后的信号数据进行估计.对大量RXTE的实测数据进行分析,结果表明在Wavelet-Fisz变换下能获得较好的估计性能,且耗时小,有利于X射线脉冲星导航的工程应用.
[Abstract]:Aiming at the problem that the signal-to-noise ratio of X-ray pulsars is low and it is difficult to obtain the precise phase of pulsars, an estimation method of X-ray pulsars based on WaveletFisz transform is proposed.According to the characteristic of X-ray pulsar signal, the signal model is established, and the theory of Wavelet-Fisz transform is deduced. The X-ray pulsar signal is approximated to Gao Si distribution by this transform, and the transformed signal data are estimated.A large number of RXTE measured data are analyzed. The results show that the estimation performance is better and the time consuming is less under the Wavelet-Fisz transform, which is beneficial to the engineering application of X-ray pulsar navigation.
【作者单位】： 西安工程大学电子信息学院;西安电子科技大学空间科学与技术学院;西安交通工程学院;
【基金】：国家自然基金(No.61301276) 西安工程大学博士启动基金(No.BS1412)资助
【分类号】：TN911.4
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本文编号：1762216