CIF: Medium: Collaborative Research: Feedback Communication: Models, Designs, and Fundamental Limits

克劳德·香农吗?年代?沟通的数学理论？是为现代通信系统的发展铺平道路的标志性事件。香农分析了在存在噪声的情况下，为了实现可靠的通信，必须向数据中添加的基本冗余。从那时起，他的观点指导了现代通信系统几乎所有方面的实际设计，如前向纠错、频谱高效通信、多用户和符号间干扰、多天线系统、机会通信和联合压缩/传输。然而，虽然反馈存在于几乎所有的现代通信系统中，但信息论领域对如何在实践中使用反馈的影响相对较小。所提出的工作将通过更全面地了解反馈应如何在通信系统中使用，以及在高速无线数据等现实延迟限制下，人们可以期望通过有效使用反馈在延迟、复杂性和传输功率方面的量化改进，从而推进知识的发展。总之，该项目的成功完成有望为信息论领域贡献新的数学工具、设计、观点和模型。这项研究的目标是将洞察力、设计指导和性能界限引入到已知的信息理论中，用于具有反馈的系统设计。通过提供新的设计原则和反馈代码，这项研究不仅有可能推进基础科学，而且有可能提高我们的通信基础设施的效率和可靠性，包括WiFi和智能手机等消费技术。鉴于个人通信设备的扩散，这种改进将提高目前利用能源和无线电频率带宽等关键资源的效率。

Claude Shannon?s ?A Mathematical Theory of Communication? is the landmark event that paved the way for the development of modern communication systems. Shannon analyzed the fundamental redundancy that must be added to data in order to achieve reliable communication in the presence of noise. Since then his vision has guided the practical design of virtually all aspects of modern communication systems such as forward error correction, spectrally-efficient communication, multiuser and inter-symbol interference, multiple-antenna systems, opportunistic communication, and joint compression/transmission. However, while feedback is present in virtually all modern communication systems, the field of information theory has had relatively little impact on how feedback is employed in practice. The proposed work will advance knowledge by developing a more complete understanding of how feedback should be employed in communication systems and what quantitative improvements in delay, complexity, and transmitted power one can expect from its effective use, under realistic delay constraints such as those found in high-speed wireless data. In summary, the successful completion of the project is expected to contribute new mathematical tools, designs, viewpoints, and models to the field of information theory.The goal of this research is to bring the insight, design guidance, and performance bounds for which information theory is known to bear on the design of systems with feedback. By providing new design principles and feedback codes, this research has the potential not only to advance basic science but also to improve the efficiency and reliability of our communications infrastructure, including consumer technology such as WiFi and smartphones. Given the proliferation of personal communication devices, such improvements would augment the efficiency with which crucial resources such as energy and radio frequency bandwidth are currently utilized.