Noise reduction processing method for wireless ultraviolet light communication

Abstract

The invention discloses a noise reduction processing method for wireless ultraviolet light communication. The method specifically comprises the following steps: 1, establishing an ultraviolet light direct-view and non-direct-view communication diversity reception model; 2, according to the established diversity reception model, carrying out diversity reception noise reduction processing on the signals of a transmitting end; 3, performing hardware filtering on the diversity-received and fused data signals, and then performing wavelet transform noise reduction processing; and 4, completing noisereduction processing of ultraviolet light direct-view and non-direct-view communication. Wavelet transformation has a good inhibition effect on dark current noise generated by a photomultiplier and thermal noise generated by circuit components, Gaussian noise and background noise caused by multipath transmission can be further inhibited, useful signals are reserved to the maximum extent, and thesignal-to-noise ratio of signals received by a receiving end is improved.

Description

technical field [0001] The invention belongs to the technical field of ultraviolet light communication, and relates to a noise reduction processing method for wireless ultraviolet light communication. Background technique [0002] With the development of information technology, people's demand for wireless communication is getting higher and higher, especially the speed of communication and the security of communication. The most commonly used radio communication is easily interfered and has poor security, so it cannot meet the wireless communication scenarios with high security requirements. [0003] Wireless ultraviolet communication (UVC) is a kind of wireless optical communication. Compared with radio communication and infrared communication, it has the advantages of high confidentiality and non-direct line-of-sight communication. Wireless ultraviolet light communication is a new type of communication method that uses ultraviolet light as the carrier and the atmospheric...

AI Technical Summary

Problems solved by technology

[0004] Due to the transmission of ultraviolet light in the atmosphere, the gas molecules and aerosol particles in the atmosphere will absorb and scatter the ultraviolet light, resulting in the signal received by the receiving end being very weak and with a lot of noise, which leads to the system performance of UVC and communication performance is reduced

Simulations and experiments have found that although UVC can achieve non-line-of-sight transmission, both single-scattering and multiple-scattering belong to multi-path transmission, which will generate Gaussian noise at the receiving end, especially multiple-scattering, although it may provide 20% energy gain , but may generate more noise

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