对荧光灯干扰下的室内可见光通信系统进行了实验测试,获得了基于开关键控(OOK)调制的室内可见光通信系统在荧光灯干扰下的接收信号时域波形,随后引入传输基带模型与5 m×5 m×3 m室内三维模型,获取室内误码率分布,分析了荧光灯干扰对室内可见光通信接收机性能的影响。结果显示,荧光灯干扰以加性噪声的形式表现在接收信号中,并导致接收信号产生类正弦的周期型信号畸变,且荧光灯干扰频谱覆盖范围较广,传输速率为10~1000 Mbit/s的信号均受影响;采用小波变换对信号进行降噪处理,结果表明,小波变换的尺度灵活性表现出消除荧光灯干扰的可能。

The indoor visible light communication system under the fluorescence interference is tested experimentally. The time-domain waveform of the received signal under fluorescence interference for the indoor visible light communication system modulated by on-off keying (OOK) modulation is obtained. Then a transmission baseband model and a 5 m×5 m×3 m indoor three-dimensional model are used to obtain the indoor bit error rate distribution. The influence of fluorescence interference on the performance of indoor visible light communication receivers is analyzed. The results show that the fluorescence interference is in the form of additive noise in the received signal, which leads to sinusoidal periodic signal distortion of the received signal. The fluorescence interference spectrum covers a wide range, and signals with a transmission rate of 10-1000 Mbit/s are affected. The signal is denoised by wavelet transform. The results show that the scale flexibility of wavelet transform can eliminate the fluorescence interference.