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Coding system and method of mdi-qkd using soft-core processor

A soft-core processor and coding system technology, applied in transmission systems, digital transmission systems, and key distribution, can solve the problems of complex structure, high control signal generation delay, and large device scale, and achieve simple system structure and low implementation. Delay control, low delay effect

Active Publication Date: 2021-06-08
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art, and propose a MDI-QKD encoding system and method using a soft-core processor to solve the delay in the prior art from random number generation to photoelectric modulator control signal generation High, large device scale, complex structure and other issues

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings.

[0044] Refer to attached figure 1 The system of the present invention is further described.

[0045] The encoding system of the present invention includes an FPGA module, a digital-to-analog converter DAC, a radio frequency amplifier RFA, and an optical module, and uses a soft-core processor in the FPGA to generate random numbers required for MDI-QKD encoding.

[0046] The digital-to-analog converter DAC is connected to the FPGA module and the optical module respectively; the radio frequency amplifier RFA is connected to the FPGA module and the optical module respectively.

[0047] Refer to attached figure 2 The field programmable gate array FPGA internal module in the system of the present invention is further described.

[0048] The FPGA module includes a soft-core processor, a first-in first-out queue FIFO, an edge detection unit, a first-in first-out queue FIFO...

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Abstract

The invention discloses an MDI-QKD coding system and method using a soft-core processor. Use the soft-core processor in the FPGA to generate the random numbers required in the MDI-QKD encoding process, and generate the digital control signals in the FPGA to control the photoelectric modulator according to the generated random numbers, and pass through the RF amplifier and digital-to-analog converter. , which is converted into an analog control signal and sent to the photoelectric modulator to complete the encoding in MDI‑QKD. Compared with other encoding systems, the present invention uses the soft-core processor in the FPGA to generate random numbers, and then directly sends them to other modules in the FPGA to generate control signals, reducing the delay from random number generation to photoelectric modulator control signal generation , which reduces the scale of the device and facilitates the miniaturization and integration of the MDI‑QKD coding system.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a measurement-device-independent quantum key distribution MDI-QKD (Measurement-Device-Independent Quantum Key Distribution) encoding system and method using a soft-core processor in the technical field of quantum key distribution. The present invention realizes the optical pulse input to the MDI-QKD coding system by adopting the soft-core processor in the Field Programmable Gate Array FPGA (Field Programmable Gate Array), combining the amplifier and the digital-to-analog conversion chip to control the optical modulator. Perform time-phase encoding. Background technique [0002] The MDI-QKD protocol is a classic QKD protocol. Its feature is that the security of the entire protocol does not depend on the security of the measurement terminal equipment, so it has the characteristics of being immune to attacks against the measurement terminal equipment. At present, MDI-QK...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/70H04L9/08
CPCH04B10/70H04L9/0852H04L9/0869
Inventor 朱畅华卢栋成张子健权东晓赵楠何先灯易运晖陈南
Owner XIDIAN UNIV
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