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arXiv 0805.4166math.FAmath.CA
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Gabor展开式的相空间分布

Phase space distribution of Gabor expansions

Gerard Ascensi, Yurii I. Lyubarskii, Kristian Seip

摘要:

我们提出了一个例子,一个完整的和最小的Gabor系统的高斯时频位移,局部化在坐标轴上的时间-频率平面(相空间)。渐近地,以原点为中心的圆盘中包含的时频位移的数量仅为在同一圆盘中发现的来自冯诺依曼晶格的点的数量的2/π倍。在要求相空间具有一定的正则分布的条件下,我们证明了在高斯型时频移的所有完备系统和极小系统中,我们的系统具有最小密度。

英文摘要:

We present an example of a complete and minimal Gabor system consisting of time-frequency shifts of a Gaussian, localized at the coordinate axes in the time-frequency plane (phase space). Asymptotically, the number of time-frequency shifts contained in a disk centered at the origin is only 2/pi times the number of points from the von Neumann lattice found in the same disk. Requiring a certain regular distribution in phase space, we show that our system has minimal density among all complete and minimal systems of time-frequency shifts of a Gaussian.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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