Fiber transmission demonstrations in vector mode space division multiplexing
نویسندگان
چکیده
منابع مشابه
Diversity-multiplexing tradeoff in mode-division multiplexing.
The capacity of mode-division multiplexing (MDM) systems is limited, for a given outage probability, by mode-dependent loss (MDL) and gain. Modal degrees of freedom may be exploited to increase transmission rate (multiplexing gain) or lower outage probability (diversity gain), but there is a fundamental tradeoff between the achievable multiplexing and diversity gains. In this Letter, we present...
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近年の無線通信の普及に伴い,無線通信のセキュリ ティ対策が重要となっている.無線通信における盗聴 対策としては,共通鍵暗号方式を用いて暗号通信を行 うことが一般的である.共通鍵暗号方式は,第三者に は秘密の情報(以下,秘密情報と呼ぶ)に対して,送 信局と受信局で同じ秘密鍵を用いて暗号化と復号を行 う方式で,暗号化した情報を伝送することで秘密情報 の安全性を保つことができる.この方式は,秘密通信 が容易であるという利点がある一方で,秘密鍵を第三 者に知られないように共有し,管理する必要がある. 秘密鍵の共有手法として,現在は公開鍵暗号方式を用 いた秘密鍵の直接配送により共有することが一般的で あるが,公開鍵暗号方式は計算量の複雑性に基づく方 式であるため,消費電力に制限のある移動通信に適用 するには計算量の点で課題が残る. この課題を解決する一手法として,電波伝搬特性に 基づいた秘密鍵...
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ژورنال
عنوان ژورنال: Frontiers of Optoelectronics
سال: 2018
ISSN: 2095-2759,2095-2767
DOI: 10.1007/s12200-018-0812-2