提出了一种基于副载波复用的新型的多输入单输出(MISO)正交频分复用可见光通信(OFDM—VLC)系统构架,并且实验验证了2×1和3×1的MISO OFDM—VLC系统传输。分别测量了2×1和3×1的实验系统的误差矢量幅度(EVM)随输入电压变化的曲线图,找出了两个系统各自的最佳偏置范围。在将输入电压设置在最佳偏置范围之内的情况下,改变传输距离,对2×1系统,给出了系统EVM性能变化的曲线图;对3×1系统,给出了系统EVM和误码率(BER)性能变化的曲线图。在没有任何均衡的情况下,两个系统的传输距离都可以长达140cm。
A novel configuration of 2 ×1 and 3×1 multiple-inputs single-output (MISO) multiple-inputs sigle output visble light communication (OFDM-VLC) system is reported experimentally. The error vector magnitude (EVM) values varying with the input voltage of 2×1 and 3×1 systems is measured, and the best ranges of bias voltage is found, respectively. By setting the input voltage in the respective best range, the EVM values of 2×1 system, the EVM values and bit error rate (BER) of 3×1 system varying with transmission distance are presented. Without equalization, the transmission distance of the two systems can both be as long as 140 cm.