SKR Analysis of One- and Two-Way CV-QKD MIMO FSO Communication System

IF 4.4 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2025-08-19 DOI:10.1109/LCOMM.2025.3600331

Sushil Kumar;Soumya P. Dash

引用次数: 0

Abstract

We present novel one-way and two-way continuous-variable quantum key distribution frameworks integrating multiple-input multiple-output (MIMO) and free-space optical systems to enhance secret key rates (SKRs) and extend transmission distance between the legitimate transceiver pair. Our models are subjected to an eavesdropper employing Gaussian collective attacks, and the receiver using homodyne detection for secret key reception. Novel expressions for the SKRs for both frameworks are computed, and asymptotic results demonstrate that both the SKR gains from employing MIMO and the two-way protocol are proportional to squared-root of the MIMO channels.

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单向和双向CV-QKD MIMO FSO通信系统的SKR分析

我们提出了一种集成多输入多输出（MIMO）和自由空间光学系统的新型单向和双向连续变量量子密钥分发框架，以提高密钥速率（SKRs）并延长合法收发器对之间的传输距离。我们的模型受到采用高斯集体攻击的窃听者和使用纯差检测的接收者的秘密密钥接收。计算了两种框架下SKR的新表达式，渐近结果表明，采用MIMO和双向协议的SKR增益都与MIMO信道的平方根成正比。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.