Resumo

LOPEZ-LEYVA, J.A et al. Adaptive low density parity check encoder for a complete free space optics/continuous variable-quantum key distribution system using commercially available off-the-shelf devices for variable throughput network considering dynamical atmospheric turbulence levels. Rev. mex. fis. [online]. 2018, vol.64, n.5, pp.478-482.  Epub 30-Nov-2019. ISSN 0035-001X.

In this paper, an adaptive low density parity check (LDPC). encoder for complete Free Space Optics/Continuous Variable-Quantum Key Distribution (FSO/CV-QKD) system using a Commercially available Off-The-Shelf (COTS) device for emulated dynamical atmospheric turbulence levels is presented. The experimental and emulation results show the maximum and minimal final secret key rates of ≈ 105 Kbps and ≈ 10 Kbps, respectively, for minimal and maximal throughput in a commercial network, 30 Mbps and 90 Mbps, respectively. Our proposal presents an adequate performance for weak and moderate atmospheric turbulence levels and a suitable option for improving the use of Quantum Key Distribution (QKD) systems.

Palavras-chave : Adaptive encoder; atmospheric turbulence; COTS device; 03.67.Dd; 05.40.Ca; 07.50.Qx.

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