Robustness combined optimization method for optical filter parameters during multi-color visible light communication process

Abstract

The present invention discloses a robustness combined optimization method for optical filter parameters during the multi-color visible light communication process. The method comprises the following steps of S1, measuring the spectral curve of each monochromatic light by utilizing a spectrometer, and fitting the spectral curve by utilizing a He model so as to obtain the fitting function of the spectrum; S2, determining a to-be-optimized optical filter parameter; S3, deriving a detected mean-square error by a receiver based on the LMMSE detection method; S4, calculating out the probability information of a user in room distribution position so as to obtain a probability density function for the light incident angle of a receiving end; S5, subjecting the detected mean-square error to the weighted treatment based on the probability density function for the light incident angle, so as to obtain a mean-square error at an average angle; S6, cooperatively solving an optimal value of each optical filter parameter based on the two-layer iteration algorithm. According to the technical scheme of the invention, the optimal value of the joint optimization for each color of an optical filter can be obtained, and the cross-interference between different colors is reduced. Meanwhile, when light rays are deflected at a certain angle, the receiver can still work normally.

Description

technical field [0001] The invention relates to the field of multicolor visible light communication, in particular to a method for robust joint optimization of filter parameters in multicolor visible light communication. Background technique [0002] With the development of technology, wireless spectrum resources are becoming more and more scarce. In recent years, visible light communication, as a supplement to radio frequency wireless communication, has become a research hotspot in the field of communication. However, compared with radio frequency wireless communication, visible light wireless communication has poor penetration and is easily blocked by objects, so visible light wireless communication system can be used as the last 20 meters of radio frequency wireless communication, suitable for indoor communication, and other short-distance communication. [0003] The polychromatic light system in visible light communication uses the method of mixing polychromatic light ...

AI Technical Summary

Problems solved by technology

[0008] In the visible light communication scenario, the receiver may be in the working state of the deflection angle. When the deflection angle is large, the passband of the filter may have deviated from the normal working range, and the performance of the receiver will be greatly reduced at this time. , doesn't even work

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