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商用发光二极管(LED)调制带宽受限制约着可见光通信的传输速率,而灯具内通常有多个LED灯芯,为此提出了通过多个灯芯同时作为通信信源,利用交织分多址技术并行叠加,单一光电检测器(PD)接收的高速传输方案。由于LED驱动电压非负、PD只检测光强信息,为此提出了基于单载波开关键控(OOK)调制的发送传输结构、接收端多LED检测和重复码译码算法;研究了可见光OOK调制的信噪比(SNR)性能估计算法;仿真中,与等条件的多载波直流(DC)偏置光正交频分复用相比较,该方案在误码率(BER)、抗非线性等性能上更优。
Commercial light-emitting diode (LED) modulation bandwidth is limited by the transmission rate of visible light communication, and the lamp usually has a plurality of LED wicks. To this end, a plurality of wicks are simultaneously used as a communication source, and the interleaving division multiple access technology is used for parallel superposition , Single photodetector (PD) receive high-speed transmission scheme. Because the driving voltage of LED is not negative, the PD only detects the light intensity information. Therefore, a transmission structure based on single-carrier on-off keying (OOK) modulation and multi-LED detection and repetitive code decoding algorithm are proposed. (BER), anti-nonlinearity, etc. Compared with the orthogonal frequency division multiplexing of multicarrier DC (DC) bias light under different conditions, Better performance.