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相干源     
相关语句
  coherent sources
     Detection of Base-code and Coherent Sources
     基底码和相干源的检测
短句来源
     The performances of applying these array manifolds to MUSIC, WSF and ML methods at subarray level are analyzed. The WSF method and ML method can be used in direction finding of coherent sources.
     分别讨论了将这几种阵列流形应用到子阵级MUSIC方法、子阵级极大似然(ML)、和子阵级加权子空间拟合方法(WSF)方法中的性能,其中后两种方法可对相干源进行测向。
短句来源
     Bearing Estimate of Coherent Sources Based on Minimum-Norm Method
     基于最小模方法的相干源方位估计
     Compared to the WK's method, this improved one can be used to estimate the number of coherent sources and to raise estimating accuracy in case of high correlation, small-angle-separation or low SNR.
     与WK′s方法相比,这种改进的算法可以估计相干源的数目,而且能提高信号源强相关、小分离角及低信噪比情况时估计源数目的准确程度。 为了进一步提高估计精度,我们还提出了乘幂的空间平滑——信息论判阶法。
短句来源
     Multivariate Correlation Coefficient Decomposition and Its Application to Map the Coherent Sources in Human Brain
     多变量相关系数分解及其在脑电相干源成像中的应用
短句来源
更多       
  coherent source
     DOA estimation of wide-band coherent source based on modified propagator method
     基于修正传播算子的宽带相干源DOA估计
短句来源
     Secondly, a scheme using MMUSIC (Modified Multiple Signal Classification) algorithm for the wideband coherent source DOA(Direction of Arrival) estimation is introduced, in which the calculation method of applying average means is adopted to enhance the space spectral estimation precision.
     其次,采用MMUSIC算法对宽带相干源进行了DOA(波达方向)估计,采用求平均值的方案以增强空间谱的估计精度。 特别是,提出了用径向基神经网络进行DOA估计,给出了模拟结果,证明了有效性。
短句来源
     Theoretical analysis shows that the performance of GML algorithm is consistant with DML's in incoherent sources case, and it improves greatly in coherent source case.
     理论分析表明,在空间只存在非相干信源时,广义最大似然算法与常规的最大似然算法是等价的,而在空间存在多相干源(组)时,它的性能较常规最大似然算法有较大的改进,方位估计的方差更小。
短句来源
     A theoretical analysis of the in-line X-ray phase-contrast imaging with partially coherent source is presented in detail by using ambiguity function (AF). Experimental results in different conditions are presented. By comparing with absorption image, the phase contrast show high contrast and visibility of the inner structure of biological sample.
     利用模糊函数对部分相干源相X射线衬成像进行了详细的理论分析·列举了不同条件下的实验结果·通过与吸收成像相比较,相衬成像无疑对生物样品的内部结构有更高的对比度和可见度·
短句来源
     This paper presents a new method for estimating two-dimensional(2-D) direction-of-arrival(DOA) in coherent source environment with a special array.
     基于特殊天线阵列,提出了一种有相干源存在情况下的二维波达方向(DOA)估计的新方法。
短句来源
  coherent signals
     High Resolution DOA Estimation Techniques for Underwater Coherent Signals
     水下相干源的高分辨方位估计技术
短句来源
     In this paper an improved spatial smoothing technique for direction-of-arrival estimation of coherent signals is proposed,which we call 搘eighted spatial smoothing (WSS)?
     提出了一种用于空间相干源DOA估计的加权空间平滑算法(WSS, weighted spatial smoothing)。
短句来源
     Direction finding in the presence of coherent signals based on data matrix decomposition
     基于数据矩阵分解的相干源方向估计新方法
短句来源
     Aiming at the practical applications on engineering, the dissertation studies the theories and methods of the coherent signals . The main results and achievements are summarized as follows:
     本文从工程实际应用的角度出发,系统研究了窄带相干源和宽带相干源高分辨方位估计的理论和方法,概括起来,本文的主要研究工作如下:
短句来源
     The algorithm reduces the sample errors by using the Toeplitz technique for the sample correlation matrix, so that it can rapidly converge and efficiently overcome the problem that the ESB Algorithm can not work in the environment of coherent signals.
     该算法通过对估计得到的阵列信号相关矩阵进行Toeplitz化 ,减小有限次采样引起的误差 ,获得较快的收敛速度 ,并能有效克服ESB算法不能在相干源环境下工作的缺点 .
短句来源
更多       
  coherent signal
     References[7]、[10]、 [14]introduced a general procedure to estimate low-dimensional subspace for the high-resolution of coherent signal sources.
     文献[7]、[10]、[14]从数据矩阵出发,提出了构造低维子空间以分辨相干源的一般方法。
短句来源
     In this paper, a new class of focusing matrices for coherent signal subspace method (CSM) is proposed.
     相干信号子空间处理方法(CSM)是一种通过构造聚焦(focusing)矩阵来估计宽带相干源波达方向(DOA)的有效方法。
短句来源
     This paper presents a new method of forming focusing matrices for the use of Coherent Signal Subspace Method (CSM). The proposed focusing transformation, which is constructed based on neural network, is a kind of perfect focusing transformation, i.e. focusing without preliminary DOA estimates and iterations.
     相干信号子空间处理方法(CSM)是一种通过构造聚焦(focusing)矩阵来估计宽带相干源波达方向(DOA)的有效方法.本文基于逆传播(BackPropagation)学习算法,给出了一种用神经网络来实现聚焦过程的新颖方法.利用这种方法进行DOA估计,可以无需预先知道源信号初始信息,不经预处理过程即可获得对DOA的高性能估计
短句来源
     Determining the Number of Coherent Signal Based on Covariance Matrix transforming
     基于协方差矩阵变换的相干源个数估计
短句来源
     Without spectral peak searching, it can accurately estimate the 2 D angle and resolve the problem of parameter pairing no matter there are coherent signal sources or not.
     无论是否存在相干源 ,新算法都能精确估计出二维到达角 ,而无需进行谱峰搜索 ,从而解决了信号参数配对问题。
短句来源
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  coherent sources
Generalized Maximum Likelihood Algorithm for Direction-of-Arrival Estimation of Coherent Sources
      
It is flexible in the sense that the arriving sources may be a mixture of multiclusters of coherent sources, the array geometry is unrestricted, and the number of sources resolved can be larger than the number of sensors.
      
By using genetic algorithm, GML is realized, and the simulation results illustrate its improved performance compared with DML, especially in the case of multiclusters of coherent sources.
      
Spatial spectrum estimation of coherent sources impinging on nonuniform arrays
      
This technology promises to design rugged compact low cost tunable coherent sources the lasing range of which can easily be adjusted.
      
更多          
  coherent source
It is concluded that the performance of the GML algorithm coincides with that of the DML algorithm in the incoherent sources' case, while it improves greatly in the coherent source case.
      
It is suggested that such a waveguide be used to study collective phenomena in quantum-mechanical systems with a high density (Bose-Einstein condensate) and as a high-luminosity coherent source of cold atoms.
      
It is based on using a coherent source and measuring interference oscillations caused by an additional phase modulation at the input of the fiber.
      
Without the discovery of a strong coherent source, holography may not have happened at all.
      
Stimulated rotational Raman scattering of CO2 laser radiation in ortho-D2 provides a high-power coherent source in the infrared region from 11 to 14 μm.
      
更多          
  coherent signals
The L-shaped uniform array of expend aperture is used to improve the precision of estimation, and the method of solving the ambiguity of angle under the condition of coherent signals is presented.
      
On two-direction spatial smoothing for estimation angle-of-direction of coherent signals
      
It is proved that the decorrelation, the effective aperture and the maximum number of distinguishable coherent signals (when array size is given) of the new method are better than those of the Evans' method.
      
In addition, the new preprocessing scheme itself can decorrelate the coherent signals received on the array.
      
Mode space smoothing algorithm to estimate DOA of coherent signals impinging on uniform circular array
      
更多          
  coherent signal
For a coherent signal, the time cross-correlation function is formed with the use of either the total signal, or a single selected mode, or a reference signal at one of the correlator inputs.
      
The problem of bearing estimation of coherent signal impinging on an array of arbitrary geometry is studied.
      
The Direction-Of-Arrival (DOA) estimation with Coherent Signal Subspace (CSS) is not easy to extend from narrowband to wideband case.
      
The statistical properties of the laser field (photon statistics) are studied under the combined action of fluctuations due to spontaneous emission processes and an external coherent signal.
      
For small photon momenta there is a coherent signal in the fragmentation regions proportional to the squared number of participant protons.
      
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