CIF: Small: Exploiting Side Information: a New Role of Feedback

传统上，反馈主要用于通信系统的重传和信道预测。最近网络信息理论的几个结果已经确定了反馈的新作用：利用侧信息来减轻干扰。由于传播媒介的广播性质，本应提供给某一用户的信息往往会被其他用户接收。反馈可以用来利用这些侧信息来提高未来传输的效率。拟议的工作建立在这些结果的基础上，提出一个统一现有孤立结果的理论，并扩展到更多感兴趣的场景。它还将确定在实践中实现反馈的新作用需要解决的具体问题。目的是缩小信息理论中的反馈研究与实践中反馈机制设计之间的差距。

Traditionally, feedback has been mainly used in communication systems for retransmission and for channel prediction. Several recent results in network information theory have identified a new role for feedback: exploiting side information to mitigate interference. Due to the broadcast nature of communication media, information intended for one user is often received by other users. Feedback can be used to exploit this side information to improve the efficiency of future transmissions. The proposed work builds upon these results to come up with a theory unifying the existing isolated results as well as broadening to more scenarios of interest. It will also identify specific problems to solve for realizing this new role of feedback in practice. The goal is to close the gap between feedback research in information theory and the design of feedback mechanisms in practice.