CIF: Small: Collaborative Research: Interference Management for Visible Light Communications via Poisson Model

可见光通信(VLC)正在成为一种可行的替代无线传输技术，可能会缓解频谱稀缺的问题。VLC使用发光二极管(LED)等普通光源作为通信介质，并在用于数据传输的光源上叠加高频开/关操作。与无线电通信相比，VLC的优势包括更宽的带宽、非常少的监管限制、无处不在的光源和更高级别的传输安全。物理层VLC设计中的主要挑战之一是由于从常规光源发出的光的扩散而引起的多个源的同时传输引起的干扰问题。虽然对高斯模型的干扰管理(在强背景光噪声条件下有效)相对较好地理解，但对于泊松模型(在低背景光噪声条件下有效)，其大部分未被探索。该项目将为泊松体制下的VLC设计新的干扰管理技术，分析VLC的相应传输速率/吞吐量，并开发信息理论方法来表征这些传输速率的基本通信限制。预计该研究将在应用和理论上做出重大贡献。在应用方面，该项目有望大大提高我们对VLC干扰管理的理解，并为设计高吞吐量和资源高效的VLC网络提供重要的指导方针。在理论层面上，该项目将发展新的随机微积分和信息论工具，以促进我们对泊松信道的理解。PIS还将利用这个项目作为一个很好的平台来吸引和培训来自不同背景的学生。

Visible light communication (VLC) is emerging as a viable alternative wireless transmission technology that could potentially alleviate the spectrum scarcity problem. VLC uses ordinary light sources such as light emitting diodes (LEDs) as the communication medium, and superposes a high frequency on/off operation on top of light sources for data transmissions. Compared to radio communications, the advantages of VLC include several orders broader in bandwidth, very little regulatory restrictions, ubiquitous light sources, and higher level of security for transmissions. One of the main challenges in the design of VLC at the physical layer is the issue of interference caused by simultaneous transmissions of multiple sources due to diffusion of lights emitted from regular light sources. While interference management for the Gaussian model (valid for the strong background light noise regime) is relatively well understood, it is mostly unexplored for the Poisson model (valid for the low background light noise regime). This project will design novel interference management techniques for VLC in the Poisson regime, analyze the corresponding transmission rates/throughputs for VLC, and develop information theoretic methodologies to characterize the fundamental communication limits on these transmission rates. The proposed research is expected to make substantial contributions to both applications and theory. On the application side, this project is anticipated to substantially advance our understanding of interference management for VLC, and provide important guidelines for designing high throughput and resource efficient VLC networks. On the theoretical level, the project will develop new stochastic calculus and information theoretic tools to advance our understanding of Poisson channels. The PIs will also use this project as a great platform to attract and train students from diverse backgrounds.