面向调光控制的可见光通信方法与装置

Visible light communication method and device aiming at dimming control

Abstract

本发明公开了一种面向调光控制的可见光通信方法及装置,其中,方法包括以下步骤:对待传输比特进行调制得到正极性信号帧与负极性信号帧;根据所需光线调制度确定正极性信号帧与负极性信号帧的所占比例与信号帧放大因子;将正极性信号帧与负极性信号帧乘以信号帧放大因子,并根据所占比例进行混合以得到混合信号帧;将混合信号帧中的负极性信号帧加上直流偏置,以得到待发送信号帧,在对待发送信号帧进行数模变换、变频、滤波之后控制可见光驱动电流,并得到可见光通信信号后发送。该方法能够在可见光通信的同时兼顾照明调光控制,在不影响可见光通信条件下,能够实现大范围、精细化的调光控制,具有通信信噪比大、能量效率高等优势。
The invention discloses a visible light communication method and device aiming at dimming control. The method comprises the following steps of: modulating a bit to be transmitted to obtain a positive polarity signal frame and a negative polarity signal frame; determining a ratio of the positive polarity signal frame to the negative polarity signal frame as well as a signal frame amplification factor according to a required light modulation degree; multiplying the positive and negative polarity signal frames by the signal frame amplification factor, and mixing according to the ratio to obtain a mixed signal frame; and adding the negative polarity signal frame in the mixed signal frame with DC bias to obtain a signal frame to be transmitted, performing digital to analog conversion on the signal frame to be transmitted, performing frequency conversion and filtration, controlling visible light driving current, and obtaining a visible light communication signal to be transmitted. Through the method, while visible light communication, lighting dimming control can be taken into account, so that on the premise of not affecting a visible light communication condition, large-scale and fine dimming control can be realized, and advantages such as lager communication signal to noise ratio and high energy efficiency are provided.

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Cited By (1)

    Publication numberPublication dateAssigneeTitle
    WO-2017185665-A1November 02, 2017清华大学Procédé et dispositif de communication de lumière visible orientés vers une commande d'assombrissement