一種基于泊松分布的提高X射線脈沖星脈沖輪廓信噪比的方法
發(fā)布時(shí)間:2018-08-24 17:48
【摘要】:論述了X射線脈沖星輻射模型和脈沖輪廓構(gòu)造算法,提出了以Kullback-leibler距離函數(shù)作為評(píng)價(jià)標(biāo)準(zhǔn),提高具有泊松分布規(guī)律的X射線脈沖星脈沖輪廓信噪比的平滑算法,推導(dǎo)了平滑參數(shù)和平滑累積脈沖輪廓的計(jì)算公式.搭建了X射線脈沖星導(dǎo)航地面模擬系統(tǒng),實(shí)現(xiàn)了對(duì)模擬X射線脈沖星單光子到達(dá)時(shí)間的記錄及X射線脈沖星脈沖輪廓的構(gòu)造,得到了X射線脈沖到達(dá)時(shí)間TOA.在X射線脈沖星導(dǎo)航地面模擬系統(tǒng)上,對(duì)平滑算法進(jìn)行了驗(yàn)證,結(jié)果表明該算法對(duì)于提高累積脈沖輪廓的信噪比效果顯著,信噪比提高大于10dB.
[Abstract]:The radiation model of X-ray pulsar and the algorithm of constructing pulse profile are discussed. A smoothing algorithm for improving the signal-to-noise ratio (SNR) of pulse profile of X-ray pulsars with Poisson distribution is proposed, which is based on the Kullback-leibler distance function. The calculation formulas of smoothing parameters and smoothing cumulative pulse profile are derived. A ground simulation system for X-ray pulsar navigation is built. The recording of the time of single photon arrival of the simulated X-ray pulsar and the construction of the pulse profile of the X-ray pulsar are realized. The X-ray pulse arrival time (TOA.) is obtained. The smoothing algorithm is verified in the X-ray pulsar navigation ground simulation system. The results show that the proposed algorithm can improve the signal-to-noise ratio (SNR) of the cumulative pulse profile with a signal-to-noise ratio (SNR) greater than 10 dB.
【作者單位】: 中國(guó)科學(xué)院西安光學(xué)精密機(jī)械研究所瞬態(tài)光學(xué)與光子技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院研究生院;
【分類號(hào)】:P145.6
本文編號(hào):2201572
[Abstract]:The radiation model of X-ray pulsar and the algorithm of constructing pulse profile are discussed. A smoothing algorithm for improving the signal-to-noise ratio (SNR) of pulse profile of X-ray pulsars with Poisson distribution is proposed, which is based on the Kullback-leibler distance function. The calculation formulas of smoothing parameters and smoothing cumulative pulse profile are derived. A ground simulation system for X-ray pulsar navigation is built. The recording of the time of single photon arrival of the simulated X-ray pulsar and the construction of the pulse profile of the X-ray pulsar are realized. The X-ray pulse arrival time (TOA.) is obtained. The smoothing algorithm is verified in the X-ray pulsar navigation ground simulation system. The results show that the proposed algorithm can improve the signal-to-noise ratio (SNR) of the cumulative pulse profile with a signal-to-noise ratio (SNR) greater than 10 dB.
【作者單位】: 中國(guó)科學(xué)院西安光學(xué)精密機(jī)械研究所瞬態(tài)光學(xué)與光子技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院研究生院;
【分類號(hào)】:P145.6
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相關(guān)期刊論文 前1條
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