Selective filtering of spatio-temporal plane waves using 3D cone filter banks

L. Bruton
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引用次数: 15

Abstract

A 3D cone-shaped pass band is ideally required for the selective filtering of spatio-temporal plane waves on the basis of their directions of arrival. A method is proposed for approximating 3D cone-shaped pass bands using a 3D cone filter bank structure in which the bands consist of band limited 3D beam filters having 3D bandwidths that are approximately proportional to their distance from the origin in the 3D frequency space. The individual 3D beam filters way be realized from a cascade of stable 3D frequency planar filters, each of which corresponds to a passive stable 3D continuous-domain frequency-planar prototype filter.
利用三维锥滤波器组对时空平面波进行选择性滤波
基于时空平面波的到达方向,理想地需要一个三维锥形通带来选择性地滤波时空平面波。提出了一种利用三维锥滤波器组结构近似三维锥形通带的方法,其中带由具有三维带宽的受限三维波束滤波器组成,其三维带宽与它们在三维频率空间中与原点的距离近似成比例。独立的三维波束滤波器通过级联稳定的三维频率平面滤波器实现,每个滤波器对应一个无源稳定的三维连续域频率平面原型滤波器。
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