Space-time-frequency degrees of freedom: Fundamental limits for spatial information

被引：9

作者：

Hanlen, Leif W. ^{[1
]}

Abhayapala, Thushara D. ^{[2
]}

机构：

[1] Natl ICT Australia, Alexandria, NSW 1435, Australia

[2] Australian Natl Univ, Canberra, ACT 0200, Australia

来源：

2007 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY PROCEEDINGS, VOLS 1-7 | 2007年

关键词：

D O I：

10.1109/ISIT.2007.4557104

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We bound the number of electromagnetic signals which may be observed over a frequency range [F - W, F + W] a time interval [0, T] within a sphere of radius R. We show that the such constrained signals may be represented by a series expansion whose terms are bounded exponentially to zero beyond a threshold. Our result implies there is a finite amount of information which may be extracted from a region of space via electromagnetic radiation.

引用

页码：701 / +

页数：2

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