多小区协作MIMO通信系统的有限反馈技术研究

项目名称： 多小区协作MIMO通信系统的有限反馈技术研究

项目编号： No.61201221

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 吴雅婷

作者单位： 上海大学

项目金额： 25万元

中文摘要： 本项目研究协作MIMO系统中对多个动态变化异质信道的有限反馈技术，为协作通信提供准确的信道状态信息。针对多小区协作MIMO通信系统的特点和反馈需求，在建立协作多点传输系统和信道模型的基础上， 1）降低反馈开销，基于分布式压缩感知方法对反馈数据进行压缩； 2）结合信道空、时、频三域相关性，设计能跟踪信道方向的、可扩展的码本和灵活的多模式反馈机制； 3）将地理位置信息引入最佳反馈模式的选取和切换决策中，优化反馈资源分配算法； 4）理论分析和仿真评估算法性能，提供反馈开销与系统性能的折衷准则； 形成一套完整的低开销、高效准确的有限反馈理论和算法，解决反馈需求量大与反馈带宽受限的矛盾，为系统实现高频谱效率等优势提供支撑。

中文关键词： 协作MIMO；有限反馈；码本；量化预编码；多小区

英文摘要： The project is focused on the research of limited feedback technology for Multi-cell Cooperative MIMO Systems, which provides the essential channel state information for collaborative communication. In view of the characteristics of collaborative multi-point (CoMP) system such as the dynamic changes in cooperative clusters and heterogeneous channels, we will first establish the system model and channel model and then 1) use the distributed compression sensing technique to compress the feedback data, thereby reducing the feedback cost; 2) design an adaptive channel-tracking scalable codebook and flexible multi-mode feedback mechanism, based on the correlation in space, time and frequency domains; 3) utilize the location information in the feedback mode selection and switching decisions and develop algorithms for optimal feedback resource allocation; 4) conduct theoretical analysis and simulation to assess the performance of the proposed limited feedback strategies and algorithms, and derive a trade-off principle between feedback overhead and system performance. Through this research, we expect to form a complete set of low-cost, highly efficient and accurate limited feedback theories and algorithms for the Multi-cell Cooperative MIMO Systems to achieve high spectral efficiency.

英文关键词： Cooperative MIMO；Limited Feedback；Codebook；Quantized precoding；Multicell