密集多通道时间反演电磁通信的基础理论与关键技术研究

项目名称： 密集多通道时间反演电磁通信的基础理论与关键技术研究

项目编号： No.61331007

项目类型： 重点项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 王秉中

作者单位： 电子科技大学

项目金额： 285万元

中文摘要： 时间反演(time reversal, TR)电磁波具有时-空同步聚焦、空间超分辨率聚焦等特性，据此可以构建大容量无线通信、超分辨率成像等新型电磁波应用系统。本项目旨在以超宽带无线通信应用为背景，系统深入地研究密集多通道TR电磁通信的基础理论与关键技术。首先，基于TR电磁波近场超分辨率聚焦特性，研究模式转换理论与调控方法，探索将近场超分辨率信息有效传递到远场的关键技术；其次，研究多径环境/时变场景下的TR信道建模方法，建立完整反映时-空同步聚焦特性、适用于TR电磁通信的信道模型；同时，研究大空间、多尺度复杂TR电磁问题的高效仿真方法，实现其可计算建模和可量化设计；然后，基于模拟信号处理技术，研究微波信号实时时间反演的实现方案和关键技术；最后，有机集成上述成果，完成密集多通道TR电磁通信原理性实验系统的构建和实验验证。项目研究将为发展新型TR电磁波应用系统奠定坚实的理论与技术基础。

中文关键词： 计算电磁学;时间反演;传播特性;信道建模;时间反演镜

英文摘要： Due to the spatial and temporal focusing characteristics and spatial super-resolution focusing characteristics, time reversal (TR) electromagnetic waves can be used to construct some novel electromagnetic systems, such as wireless communication systems with huge capacity and imaging systems with super-resolution. Based on the application of ultra-wideband wireless communication, this project aims to investigate the basic theories and key technologies in TR-based electromagnetic communication systems with compact multiple channels. Firstly, based on the near-field super-resolution focusing characteristics of TR electromagnetic waves, we will study the mechanism and controlling methods of mode transformation, and further explore how to transmit the super-resolution information from near field to far field. Secondly, we will investigate the modeling methods of TR channel in multi-path environments/ time-varying scenarios, and set up the TR channel model which includes the spatial and temporal focusing characteristics. At the same time, we will do research on the efficient simulation methods for the large- and multi-scale electromagnetic problems in TR systems, and realize the computational modeling as well as quantitative designing. Besides, we will look for the feasible schemes and key technologies to realize the real-time time reversal of microwave signals, based on the analog signal processing techniques. Finally, based on the above research results, we will construct a prototype experimental system to demonstrate the performance of the TR-based electromagnetic communication system with compact multiple channels. The investigation of this project can establish important theoretical and technological foundations for future developments of TR-based electromagnetic application systems.

英文关键词： computational electromagnetics;time reversal;propagation characteristics;channel modeling;time reversal mirror