针对信道的衰落效应会大大影响通信速率和可靠性的问题, 提出了一种基于SSD(信号空间分集)方案的OFDM(正交频分复用)调制技术解决方法, 并通过实验证明了在可见光通信系统中, 该方法可以使得在衰落环境中(9～24 dB)信道误码率得到0.7～1.3 dB的改善, 并实现120～160 Mbit/s的物理数据速率。

The communication rate and reliability is greatly affected by the channel fading effect.In order to solve the problem, we propose a method based on Signal Space Diversity (SSD) in OFDM modulation scheme in this paper. The experimental results show that the method can achieve 0.7～1.3 dB Bit Error Rate (BER) improvement at the data rate of 120～160 Mbit/s in fading environment with over 9～24 dB attenuation in Visible Light Communication (VLC) system.