本文選題：光子序列 + 降噪　； 參考：《光子學(xué)報(bào)》2014年12期

【摘要】：針對(duì)X射線脈沖星信號(hào)信噪比低,難以獲取精確脈沖星信號(hào)相位的問題,提出了基于WaveletFisz變換的X射線脈沖星信號(hào)的估計(jì)方法.根據(jù)X射線脈沖星信號(hào)特性建立了信號(hào)模型,推導(dǎo)了Wavelet-Fisz變換理論,利用該變換將X射線脈沖星信號(hào)逼近于高斯分布,對(duì)變換后的信號(hào)數(shù)據(jù)進(jìn)行估計(jì).對(duì)大量RXTE的實(shí)測數(shù)據(jù)進(jìn)行分析,結(jié)果表明在Wavelet-Fisz變換下能獲得較好的估計(jì)性能,且耗時(shí)小,有利于X射線脈沖星導(dǎo)航的工程應(yīng)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.
【作者單位】： 西安工程大學(xué)電子信息學(xué)院;西安電子科技大學(xué)空間科學(xué)與技術(shù)學(xué)院;西安交通工程學(xué)院;
【基金】：國家自然基金(No.61301276) 西安工程大學(xué)博士啟動(dòng)基金(No.BS1412)資助
【分類號(hào)】：TN911.4
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本文編號(hào)：1762216