Performance Analysis of One- and Two-way DV-QKD with MIMO FSO Communication Systems
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866914142505402368 |
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| author | Kumar, Sushil Dash, Soumya P. Alexandropoulos, George C. |
| author_facet | Kumar, Sushil Dash, Soumya P. Alexandropoulos, George C. |
| contents | This paper considers a multiple-input multiple-output (MIMO) wireless system wherein two legitimate users attempt to exchange secret keys over free-space optical (FSO) channels. Novel frameworks for the use of the one- and two-way discrete-variable quantum key distribution (DV-QKD) protocols, employing weak coherent pulses and decoy states, are presented. Focusing on the case where a photon-number-splitting attack is adopted by the eavesdropper and the legitimate multi-antenna receiver using threshold detection for the key extraction, novel expressions for the secret key rate and quantum bit error rate for both one- and two-way protocols are derived. The performance gain with larger MIMO configurations and the tradeoff between the performances with the one- and the two-way protocols with respect to the transmission distance of the legitimate FSO link are numerically assessed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_05173 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Performance Analysis of One- and Two-way DV-QKD with MIMO FSO Communication Systems Kumar, Sushil Dash, Soumya P. Alexandropoulos, George C. Quantum Physics Signal Processing This paper considers a multiple-input multiple-output (MIMO) wireless system wherein two legitimate users attempt to exchange secret keys over free-space optical (FSO) channels. Novel frameworks for the use of the one- and two-way discrete-variable quantum key distribution (DV-QKD) protocols, employing weak coherent pulses and decoy states, are presented. Focusing on the case where a photon-number-splitting attack is adopted by the eavesdropper and the legitimate multi-antenna receiver using threshold detection for the key extraction, novel expressions for the secret key rate and quantum bit error rate for both one- and two-way protocols are derived. The performance gain with larger MIMO configurations and the tradeoff between the performances with the one- and the two-way protocols with respect to the transmission distance of the legitimate FSO link are numerically assessed. |
| title | Performance Analysis of One- and Two-way DV-QKD with MIMO FSO Communication Systems |
| topic | Quantum Physics Signal Processing |
| url | https://arxiv.org/abs/2511.05173 |