Quantum key distribution data negotiation method and system based on LDPC-Polar joint coding
A quantum key distribution, LDPC code technology, applied in the field of quantum secure communication, can solve the problems of low negotiation efficiency, high bit error rate, low channel data negotiation efficiency, etc., to reduce the key bit error rate, enrich application scenarios, The effect of improving the efficiency of channel data negotiation
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[0040]The present invention will be further described below in conjunction with specific embodiments. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.
[0041]As a data negotiation model of CV-QKD, the structure of the traditional multi-level coding / multi-level decoding model is as followsfigure 1 Shown. The multi-level coding / multi-level decoding model is mainly composed of a multi-level decoder and a multi-level encoder. For a general multi-level coding system, an error is generated in one level of decoding, and then the error is propagated between other levels, which will eventually lead to a phenomenon that the bit error rate increases. However, this phenomenon does not appear in the multi-level coding / multi-level decoding model, because the multi-level coding / multi-level decoding model can be flexibly designed for each level of encoder, and...
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