When the generalized spatial modulation (GSM) is applied to visible light communication (VLC), radio frequency (RF) technologies, such as constellation designs, should be modified for the ergodic VLC channel, which is different from that in typical RF environments. In this paper, constellations of amplitude-phase modulation (APM) symbols are optimized for GSM-based VLC systems in which optical signals must be real-valued and non-negative, while the ergodic VLC channel and the random characteristic of receiver locations are also considered. The algorithm of statistically convergent gradient descent (SCGD) is adopted for the maximization of coded modulation average mutual information (CM-AMI), and superior performances of optimal constellations are verified by numerical simulations.

中文翻译：

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在遍历VLC信道下基于广义空间调制的星座优化。

当将通用空间调制（GSM）应用于可见光通信（VLC）时，应针对遍历VLC通道修改诸如星座设计之类的射频（RF）技术，该技术不同于典型的RF环境。本文针对基于GSM的VLC系统优化了振幅相位调制（APM）符号星座，在该系统中，光信号必须是实值且非负的，而遍历的VLC通道和接收器位置的随机特性也是考虑过的。采用统计收敛梯度下降算法（SCGD）最大化编码调制平均互信息（CM-AMI），并通过数值仿真验证了最优星座的优越性能。