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Multi-channel frequency coding information transmission system based on single photon detection

An information transmission system and single-photon detection technology, applied in the field of communication, can solve the problems of channel loss of information bits, loss, bit errors, etc., to achieve the effect of increasing the degree of freedom of the spectrum, high frequency band utilization, and improving the communication rate

Active Publication Date: 2016-10-26
山西重明光子通信技术有限公司
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AI Technical Summary

Problems solved by technology

[0006] The present invention aims to propose a multi-channel frequency encoding technology based on single-photon detection to solve the problems of information bit loss and bit error caused by channel loss and noise in single-photon level communication

Method used

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  • Multi-channel frequency coding information transmission system based on single photon detection
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  • Multi-channel frequency coding information transmission system based on single photon detection

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Embodiment Construction

[0025] Specific embodiments of the present invention will be described in detail below.

[0026] The multi-channel frequency encoding technology based on single-photon detection described in this embodiment has extremely strong information recovery and extraction capabilities in noise and loss channels. The information is loaded by frequency modulation of the laser at the transmitting end, and the light intensity received by the receiving end is at the single-photon level, and the frequency information is extracted by measuring the single-photon pulse sequence through a single-photon detector and performing Fourier transform. The number of photons in a coherent light source at the single-photon level obeys the Poisson distribution, which means that the probability of photons appearing at any position on the time axis is the same. A single-photon coherent light source can be regarded as a completely random time-domain waveform, and its frequency spectrum is the distribution of ...

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Abstract

The invention relates to fault tolerance single photon communication technology, and in particular to a multi-channel frequency coding technology based on single photon detection with laser light as an information carrier. Laser light undergoes frequency modulation at a transmitting end and is loaded with information. After channel transmission, the intensity of the laser light attenuates to a single photon magnitude, and the laser light is measured by a single photon detector at a receiving party, and the detected single photon pulse sequence undergoes Fourier transformation so as to extract frequency information. According to the invention, the system has very strong fault tolerance in terms of channel loss and noise. The system addresses the problem of information loss and errors that are caused by channel loss and noise in long-distance laser communication and quantum communication, and provides technical means for the realization of satellite-ground laser communication and quantum secure direct communication.

Description

technical field [0001] The invention belongs to the field of communication and relates to optical communication technology, in particular to a multi-channel frequency coded information transmission system based on single photon detection with laser as an information carrier. Background technique [0002] Today, with the rapid development of information technology, people have an urgent need for large-capacity satellite-ground communication technology. In particular, deep space exploration helps to study the origin, evolution and current situation of the solar system and the universe, and to find a new home for human beings. According to the characteristics of deep space exploration and communication, in the X-band and Ka-band, the measures currently adopted internationally are generally Increase the antenna aperture of the ground deep space station, reduce the temperature noise of the receiving system at the same time, and adopt coding and decoding technology and source comp...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/516H04B10/54H04B10/70
CPCH04B10/503H04B10/516H04B10/54H04B10/70H04L9/0852H04B10/5161H04B10/532H04B10/5561H04B10/5563
Inventor 胡建勇景明勇于波肖连团贾锁堂
Owner 山西重明光子通信技术有限公司
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