【摘要】 针对LED的非线性特征,提出一种计算OOK调制可见光通信系统的非线性噪声的方法,进而求出传输信噪比以及误码率。运用Matlab仿真分析得出LED直流偏置点和误码率的关系曲线,并通过可见光通信系统图像传输实验验证了该曲线的正确性。该曲线对于LED的型号和最佳偏置点的选取具有很好的指导意义。更多还原

【Abstract】 An algorithm of nonlinearity noise led by LED nonlinearity was proposed. The signal-tonoise ratio and bit error rate of visible light communications system with OOK modulation could be obtained through the algorithm. The curve about the relation between LED bias point and bit error rate were plotted with Matlab simulation. The results were proved by visible light communication system image transmission experiment. The curve has great significance on the choice of proper LED model and bias point about VLC system experiment.更多还原