發(fā)布時(shí)間：2018-04-22 03:16

  本文選題：時(shí)延估計(jì) + 線性調(diào)頻Z變換�。� 參考：《信號(hào)處理》2014年10期

【摘要】：時(shí)延估計(jì)作為一種目標(biāo)定位技術(shù)廣泛應(yīng)用于各種領(lǐng)域,而其估計(jì)精度卻會(huì)受到各種因素的影響,使得定位的準(zhǔn)確度受限。因此,本文主要針對(duì)采樣率受限和噪聲影響等問(wèn)題,提出了一種高精度的時(shí)延估計(jì)方法。它以相關(guān)峰精確插值法為基礎(chǔ),利用二次相關(guān)和希爾伯特差值進(jìn)行改進(jìn)。仿真結(jié)果表明,該法不僅可以在已有采樣率的基礎(chǔ)上提高相關(guān)函數(shù)的分辨率,而且還具有較強(qiáng)的抗噪聲性能和峰值檢測(cè)能力。它在高信噪比環(huán)境下可以得到相當(dāng)精確的時(shí)延值,在低信噪比環(huán)境下時(shí)延估計(jì)性能改善顯著。因此,本文所提的算法是一種能精確進(jìn)行時(shí)延估計(jì)的有效方法。
[Abstract]:As a kind of target location technology, time delay estimation is widely used in various fields, but its estimation accuracy will be affected by various factors, so the accuracy of location is limited. Therefore, a high precision time delay estimation method is proposed to solve the problem of sampling rate limitation and noise effect. It is improved by quadratic correlation and Hilbert difference based on the exact interpolation method of correlation peak. The simulation results show that this method can not only improve the resolution of correlation function on the basis of the existing sampling rate, but also have strong anti-noise performance and peak detection ability. It can obtain quite accurate delay value in high signal-to-noise ratio (SNR) environment, and improve the performance of delay estimation in low signal-to-noise ratio (SNR) environment. Therefore, the proposed algorithm is an effective method for accurate time delay estimation.
【作者單位】： 燕山大學(xué)信息科學(xué)與工程學(xué)院;
【分類(lèi)號(hào)】：TN911.7
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本文編號(hào)：1785355