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时差估计
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  time delay estimation
     The Time Delay Estimation of Wide-band Signal Using Cross-Ambiguity Function
     基于互模糊函数的宽带信号时差估计
短句来源
     Applying Phase Correlation to Time Delay Estimation Research
     广义相位相关用于时差估计技术研究
短句来源
     The method, based on cross-ambiguity function, is more suitable for time delay estimation in low SNR.
     这种基于互模糊函数的算法与传统的直接互相关法相比,更适用于低信噪比情况下的时差估计
短句来源
     Time delay estimation of radar signal is an important task in radar signal processing. This paper first introduces typical time delay estimation methods. Then based on our research,an improved algorithm for time delay estimation of radar signal is proposed,It applying phase correlation to broad sense correlation delay estimation algorithm.
     对雷达信号的时延估计技术进行研究是雷达信号处理的一项重要任务,本文首先介绍了典型的时差估计方法,然后结合我们的研究针对雷达信号的时差估计作出了一种改进的算法,它将相位相关技术应用到广义相关时差估计算法中,通过仿真验证了该算法的有效性,并得到了一些有益的结论。
短句来源
  time-delay estimation
     Time-delay estimation for sub-sampling sinusoidal signals
     欠采样条件下的正弦信号时差估计
短句来源
     To resolve the problem of time-delay estimation for sub-sampling sinusoidal signals,a new method composed of multi-period sampling and multi-layer correlation is proposed.
     针对正弦信号时差估计的多解模糊问题,提出采用多周期取点欠采样和多重相关方法来解决。
短句来源
  delay estimation
     The Time Delay Estimation of Wide-band Signal Using Cross-Ambiguity Function
     基于互模糊函数的宽带信号时差估计
短句来源
     Applying Phase Correlation to Time Delay Estimation Research
     广义相位相关用于时差估计技术研究
短句来源
     The method, based on cross-ambiguity function, is more suitable for time delay estimation in low SNR.
     这种基于互模糊函数的算法与传统的直接互相关法相比,更适用于低信噪比情况下的时差估计
短句来源
     Time delay estimation of radar signal is an important task in radar signal processing. This paper first introduces typical time delay estimation methods. Then based on our research,an improved algorithm for time delay estimation of radar signal is proposed,It applying phase correlation to broad sense correlation delay estimation algorithm.
     对雷达信号的时延估计技术进行研究是雷达信号处理的一项重要任务,本文首先介绍了典型的时差估计方法,然后结合我们的研究针对雷达信号的时差估计作出了一种改进的算法,它将相位相关技术应用到广义相关时差估计算法中,通过仿真验证了该算法的有效性,并得到了一些有益的结论。
短句来源
  “时差估计”译为未确定词的双语例句
     TDOA Estimation Method of Cycle Stationary Communication Signal
     周期平稳通信信号时差估计
短句来源
     Moveout estimation for P-S converted wave
     PS转换波的时差估计
短句来源
     A method for the estimation of the time difference of arrivals of the spread spectrum communication signals
     扩频通信信号的到达时差估计方法
短句来源
     Real TDOA Estimation Model for Communication Signal
     一种实用的通信信号时差估计模型
短句来源
     Time-Delay-of-Arrival Estimator of Radar Signal Based on Cyclic Cross-Correlation
     基于循环互相关的宽带信号时差估计
短句来源
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  time delay estimation
LMS adaptive time delay estimation with two windows
      
An LMS adaptive time delay estimation method with two windows is presented.
      
It is suitable for the time delay estimation of white band-limited random signals.
      
A high resolution time delay estimation based on the maximum entropy power spectrum estimaton
      
Multipath time delay estimation is constrained by the width of the signal correlation function when using correlation based methods.
      
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  time-delay estimation
Stochastic averaging analysis of a steepest-descent-type adaptive time-delay estimation algorithm
      
In this paper stochastic averaging analysis tools are used to study an adaptive time-delay estimation algorithm.
      
As applications, the problems of adaptive noise cancellation and time-delay estimation are discussed and simulated.
      
Time-delay estimation is developed in the transform domain where discrete cosine transform (DCT) coefficients of time-varying delay signals are estimated.
      
A Cyclic Statistics-Based Parametric Approach to Time-Delay Estimation
      
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  delay estimation
The errors of delay estimation using the analytical models proposed in this paper are less by 3% in comparison to the SPICE-computed delay.
      
LMS adaptive time delay estimation with two windows
      
An LMS adaptive time delay estimation method with two windows is presented.
      
It is suitable for the time delay estimation of white band-limited random signals.
      
A high resolution time delay estimation based on the maximum entropy power spectrum estimaton
      
更多          


The mechanism of Ms6.4 earthquake on May 3, 1996, at west Bac Ton, Nei Mongol, is estimated with a joint inversion method using mantle waveform fitting and P wave first inchon signs. Nodal plane l(40°, 70°,-174°), nodal plane 2(308°, 84°,-20°); principal compressive axis P(-13.95×1017Nm, 262°, 19°), principal extensional axis T(15.66×1017Nm, 356°, 10°), neutral axis N(B) (1.52×1017Nm, 112,69°) are obtained. The earthquake formed a left-lateral strike-slip and weak dipslip fault and the fault plane is steep....

The mechanism of Ms6.4 earthquake on May 3, 1996, at west Bac Ton, Nei Mongol, is estimated with a joint inversion method using mantle waveform fitting and P wave first inchon signs. Nodal plane l(40°, 70°,-174°), nodal plane 2(308°, 84°,-20°); principal compressive axis P(-13.95×1017Nm, 262°, 19°), principal extensional axis T(15.66×1017Nm, 356°, 10°), neutral axis N(B) (1.52×1017Nm, 112,69°) are obtained. The earthquake formed a left-lateral strike-slip and weak dipslip fault and the fault plane is steep. That nodal plane 2 may be near the actUal fault plane is inferred by the distribution of aftershocks with ML>3.0 and the distribution of earthquake intensity with degree m, as well as the relative position of macroscopic epicenter to the microcosmic one. That the source depth is about 21km was estimated by the bine differences betWeen sP and P arrival bine on BHZ channel.

利用地幔波波形拟合和P波初动符号联合反演的方法,估计了1996年5月3日内蒙古包头西MS6.4级地震的震源机制.得到节面1(40°,70°,-174°),节面2(308°,84°,-20°)。主压力轴P(-13.95×1017Nm,262°,19°),主张力轴T(15.66×1017Nm,356°,10°),中性轴N(B)(1.52×1017Nm,112°,69°).地震形成左旋走滑兼弱倾滑断裂,断裂面较陡.据ML≥3.0级的余震分布、Ⅷ度区的烈度分布以及宏观震中与微观震中的相对位置推测,节面2可能与实际的地震破裂面相近.据宽频垂直向(BHZ)波形记录中SP与P的到时差估计,震源深度约为21Km.

Based on the spectral correlation theory, a model and algorithms of time difference of arrival (TDOA) estimation for cyclostationary signals are presented first, and then this model is used for the TDOA estimation of the spread spectrum communication signals in the highly noisy and jamming environment. Some typical results of simulation using a computer are given finally. It is shown that this method can find wide use in the location and direction finding of the spread spectrum communication signals.

以周期谱相关理论为基础,讨论了谱相关到达时差估计模型和实现方法,将该模型应用于有噪声和干扰条件下的扩频通信信号的到达时差(TDOA)估计.给出了几种典型情况下的计算机仿真结果,阐明了它对扩频信号的测向和定位具有广阔的应用前景.

In the real three station TDOA locating system,there is frequency difference between IF output of the receiver receiving direct signal and IF ouput of the receiver recieving indirect signal ,which decreases the TDOA estimation precision.For reducing the impact from FD,this paper presents a useful and fast model to estimate TD ,then simulates the model.The simulation shows that the model reduces the effect of FD,improves the performance of TDOA estimation and decreases the computational load.

在实际三站或多站时差定位系统中 ,接收转发信号和直达信号的两接收机的中频输出信号存在频差 ,从而影响时差估计精度。为了尽量消除这一影响 ,提出了一种通用的快速的时差估计模型 ,并进行了仿真。仿真结果显示 :该模型消除了频差的影响 ,提高了时差测量精度和速度。

 
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