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英文字典中文字典相关资料:


  • Welch bounds - Wikipedia
    In mathematics, Welch bounds are a family of inequalities pertinent to the problem of evenly spreading a set of unit vectors in a vector space The bounds are important tools in the design and analysis of certain methods in telecommunication engineering, particularly in coding theory
  • Geometry of the Welch Bounds - arXiv. org
    As noted in the introduction to this paper, several authors have investigated conditions under which the Welch bound with is satisfied with equality A condition for all > is given below, followed by some discussion about when these higher-order Welch bounds are important
  • Mutual Coherence and The Welch Bound - angms. science
    The lower bound of Mutual Coherence - Welch inequality In fact there is a lower bound of M for any matrix A 2 m R n
  • Welch bounds - HandWiki
    In mathematics, Welch bounds are a family of inequalities pertinent to the problem of evenly spreading a set of unit vectors in a vector space The bounds are important tools in the design and analysis of certain methods in telecommunication engineering, particularly in coding theory
  • Geometry of the Welch bounds - ScienceDirect
    This paper has extended the geometric perspective to obtain the higher- order Welch bounds, with the kth bound for k 1 arising naturally from observing either the k-fold Hadamard product of the Grammian or the frame operator associated with a frame on a space of symmetric k-tensors
  • The Welch Bound - Bohrium
    Discover the Welch bound, a fundamental limit in vector spaces Learn its principles and applications in compressed sensing, engineering, and quantum physics
  • Achieving the Welch bound with difference sets - IEEE Xplore
    In a number of applications, the codebook that minimizes the maximal cross-correlation amplitude (I sub max ) is often desirable Relying on tools from combinatorial number theory, we construct analytically optimal codebooks meeting, in certain cases, the Welch lower bound
  • 韦尔奇界限_百度百科
    韦尔奇界限是2008年公布的海峡两岸信息科学技术名词。
  • Meeting the Welch Bound with Equality | Springer Nature Link
    WBE signal sets are of interest in synchronous CDMA communication systems This chapter surveys the known results on WBE signal sets and extends them in several ways
  • Welch 方法中重叠和加窗的作用_边缘效应-CSDN博客
    这里的 “ 减小边缘效应，平滑频谱，提高估计的稳定性 ” 是针对 重叠数据块的作用 1 什么是“边缘效应”？ 窗口函数的影响：窗口函数（如汉宁窗）会显著降低数据块两端样本的幅度，边缘的样本因此对频谱估计贡献很小，甚至几乎没有贡献。 截断效应：信号在计算离散傅里叶变换（DFT）时，通常是有限长度的。 信号截断会导致频谱失真，主要体现在频谱泄漏和噪声增大。 如果没有重叠，窗口函数对数据块边缘的样本衰减非常强，这些样本的频率信息会被忽略，导致频谱估计不完整。 数据块之间没有任何样本共享会加剧这一问题。 2 如何通过重叠“减小边缘效应”？ 当样本在一个数据块中靠近边缘并受到强烈衰减时，它可能在另一个数据块的中心，权重最大。 通过这种方式，每个样本的信息在不同数据块中都会被考虑到。





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