Non-Line-of-Sight Ultraviolet Communications Principles and Technologies【電子書籍】[ Renzhi Yuan ]

＜p＞This book provides a comprehensive review and the latest progress of ultraviolet communications. Optical wireless communications employing electromagnetic waves in optical wavebands as information carriers can achieve higher communication bandwidth compared with radio frequency based wireless communication. However, the good directionality of optical waves degrades its non-line-of-sight transmission ability for avoiding obstacles.＜/p＞ ＜p＞The ultraviolet communication employs the ultraviolet light in “solar blind” waveband (200?280 nm) as information carriers. The name “solar blind" is derived from the fact that the solar radiation in 200?280 nm is strongly absorbed by the ozone layer of the atmosphere such that little ultraviolet lights can reach the earth's surface. Therefore, ultraviolet communications enjoy low background radiation noise compared with other optical wireless communications. Besides, the strong absorption effect of ultraviolet lights in the atmosphere also guarante．．．楽天市場のショップで商品詳細の続きを見る