基于空时频域耦合的分布式MIMO信道建模

Distributed MIMO system can effectively reduce access distance to improve system coverage performance. It can provide lots of advantages including large capacity, low power consumption, easy expansion and good compatibility. So it becomes one of the development trends of future mobile communication systems. Distributed MIMO channel modeling is the basis of the study of distributed wireless communication technology. The design and development and evaluation of distributed MIMO system optimization are relied on the channel models. However, compared with the traditional centralized MIMO system, the distributed MIMO system has different antenna structure and physical channel characteristics. So the distributed MIMO channel model is more complex. Until now, there is still no good distributed MIMO channel model which can satisfy the requirements of distributed MIMO algorithm design and system-level simulation. In this project, the broadband, time-varying, distributed MIMO channel modeling will be studied. By analyzing the actual measurement data, the large scale and small scale parameters of distributed MIMO channel will be extracted. The correlations between temporal, spatial and frequency domain will be analyzed. Finally, the distributed MIMO channel model will be established. This project will provide the theoretical and practical basis for the future of wireless and mobile communication technology development, and play a fundamental and pioneering role in China's next generation of communication systems technology development and system applications.

分布式MIMO系统可以有效地缩短接入距离以改善功率覆盖，具有容量大、功耗低、易扩展、兼容性好等诸多优点，因而成为未来移动通信系统的发展趋势之一。对分布式MIMO信道的建模工作是分布式无线通信研究的基础，可为分布式MIMO系统的设计研发和评估优化提供依据。然而，分布式MIMO系统与传统集中式MIMO系统相比，在天线结构、物理信道特征等方面都有很大不同，因此其信道模型相对于传统集中式MIMO信道更为复杂，目前尚没有面向分布式MIMO算法评估及系统级仿真需求的信道模型。本课题以宽带、时变、分布式MIMO信道为研究对象，开展建模研究。通过对分布式MIMO信道实际测量数据进行分析，得到大小尺度信道的空、时、频参数相关性，分析提取各域间的耦合关系，进而为分布式MIMO信道建立信道模型。研究将为未来无线与移动通信技术发展提供理论和实践依据，对我国下一代通信系统的技术开发和系统应用起到基础性和先导性作用。

分布式多入多出(multiple-input-multiple-output, MIMO)系统可以有效地缩短接入距离以改善功率覆盖，具有容量大、功耗低、易扩展、兼容性好等诸多优点，因而成为未来移动通信系统的发展趋势之一。对分布式MIMO信道的建模工作是分布式无线通信研究的基础，可为分布式MIMO系统的设计研发和评估优化提供依据。然而，分布式MIMO系统与传统集中式MIMO系统相比，在天线结构、信道特征等方面都有很大不同，因此其信道模型相对于传统集中式MIMO信道更为复杂。本项目以宽带、时变、分布式MIMO信道为研究对象，开展建模研究工作。通过对典型场景信道实际测量数据进行分析，提取了大尺度和小尺度信道参数特性与变化规律，刻画了信道空域、时域、频域的信道参数，并建立了基于空间位置的信道参数统计特性模型。研究了分布式多链路相关性与传播环境的关系，从分析结果出发建立了相应的分布式信道相关性模型，引入了天线选择技术以提升分布式天线系统容量增益。将信道模型研究成果应用在室内定位、物理层安全、大规模MIMO等技术领域，为相应系统设计提供了设计参考。研究将为未来无线与移动通信技术发展提供理论和实践依据，对我国下一代通信系统的技术开发和系统应用起到基础性和先导性作用。