Run-length limited (RLL) codes can facilitate reliable data transmission and provide flicker-free illumination in visible light communication (VLC) systems. We propose novel high-rate RLL codes, which can improve error performance and mitigate flicker. Two RLL coding schemes are developed by designing the finite-state machine to further enhance the coding gain by improving the minimum Hamming distance and using the state-splitting method to realize small state numbers. In our RLL code design, the construction of the codeword set is critical. This codeword set is designed considering the set-partitioning algorithm criterion. The flicker control and minimum Hamming distance of the various proposed RLL codes are described in detail, and the flicker performances of different codes are compared based on histograms. Simulations are conducted to evaluate the proposed RLL codes in on-off keying modulation VLC systems. Simulation results demonstrate that the proposed RLL codes achieve superior error performance to the existing RLL codes.

行程限制（RLL）代码可以促进可靠的数据传输，并在可见光通信（VLC）系统中提供无闪烁的照明。我们提出了新颖的高速率RLL码，它可以改善错误性能并减轻闪烁。通过设计有限状态机，开发了两种RLL编码方案，以通过改善最小汉明距离并使用状态分解方法实现较小的状态数来进一步提高编码增益。在我们的RLL代码设计中，码字集的构造至关重要。设计该码字集时要考虑到集划分算法标准。详细描述了各种建议的RLL代码的闪烁控制和最小汉明距离，并基于直方图比较了不同代码的闪烁性能。进行仿真以评估在开关键控调制VLC系统中提出的RLL码。仿真结果表明，所提出的RLL代码具有比现有RLL代码更高的错误性能。