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A synchronization method and device suitable for an extremely low receiving rate

A technology of reception rate and synchronization position, applied in the field of communication, can solve the problems of inability to achieve synchronization, low reception rate of quantum secure direct communication, etc., achieve fast and complete synchronization, correct information loss and errors, and solve the effect of reliable transmission

Inactive Publication Date: 2019-06-25
BEIHANG UNIV
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Problems solved by technology

However, because the reception rate of quantum-safe direct communication is too low, traditional synchronization methods cannot achieve synchronization

Method used

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  • A synchronization method and device suitable for an extremely low receiving rate
  • A synchronization method and device suitable for an extremely low receiving rate
  • A synchronization method and device suitable for an extremely low receiving rate

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Embodiment Construction

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0020] figure 1 A schematic diagram of a synchronization method suitable for extremely low reception rates provided by an embodiment of the present invention, such as figure 1 As shown, an embodiment of the present invention provides a synchronization method suitable for extremely low reception rates, the method comprising:

[0021] Step ...

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Abstract

The embodiment of the invention provides a synchronization method and device suitable for an extremely low receiving rate. The method comprises the steps that each spread spectrum bit in a spread spectrum sequence of current information bits is compared with each spread spectrum code word sequence obtained after specific code word space spread spectrum, the number of the same bits is recorded to serve as a set of count values, and whether the current information bits are synchronous positions or not is determined. According to the synchronization method and device suitable for the extremely low receiving rate provided by the embodiment of the invention, rapid complete synchronization is realized in a short spread spectrum period, information loss and errors of transmission symbols in a quantum channel can be effectively corrected, and therefore, the problem of reliable transmission of information in quantum secure direct communication is solved.

Description

technical field [0001] The embodiments of the present invention relate to the field of communication technologies, and in particular to a synchronization method and device suitable for extremely low reception rates. Background technique [0002] Quantum communication is an emerging interdisciplinary subject combining quantum physics and classical communication. It regards quantum states as information carriers, and uses the basic principles of quantum mechanics for information encoding, communication control and secure transmission. As an important part of quantum communication, quantum secure direct communication technology communicates by directly establishing a quantum channel. In the process of information transmission, both parties do not need to determine the secret key in advance, so it has the advantages of high security and high capacity. It is a kind of New secure communication technology. However, when the sending end loads the sent information onto the single ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7073H04B10/70H04L1/00H04L9/08
Inventor 黄勤李威宋李园
Owner BEIHANG UNIV
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