扩展空频自由度的机会式无干扰传输新技术研究

项目名称： 扩展空频自由度的机会式无干扰传输新技术研究

项目编号： No.61501376

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 姚如贵

作者单位： 西北工业大学

项目金额： 22万元

中文摘要： 无线业务的持续增长导致了频谱资源变得越来越稀缺。为了有效提高频谱利用率，同频配置多层网络成为了一项具有广阔前景的解决方案。如何很好的解决该网路中干扰管理问题是实用化面临的一项关键技术。针对干扰管理，拟展开基于扩展空频自由度的机会式无干扰传输新技术研究。充分利用协作层间预编码带来的自由度提升，设计低性能损失、低复杂度的层内预编码；引入多天线配置，探索空频域机会式无干扰传输联合设计，充分发掘空频域的自由度，有效提高系统容量；拓展空频域机会式无干扰传输在多小区配置下的应用，优化设计信号对齐方案，降低干扰子空间维度；研究信道估计误差受限条件下稳健信号对齐优化设计。拟解决的关键问题包括空频域联合优化设计、引入信道估计误差的稳健设计，以及求解复杂优化问题时性能与复杂度折中的算法设计。力求在空频域机会式无干扰传输新技术研究取得创新性成果，为解决未来移动通信系统中的干扰管理积累一些理论基础。

中文关键词： 干扰对齐；稳健优化

英文摘要： The sustained growth of wireless service has led to the increasing shortage of spectrum resources. In order to effectively improve the efficiency of limited spectrum, multi-layer network operating on the same frequency spectrum has become a promising solution. The key point of this network is interference management. In this project, a new technology of interference-free transmission based on the extended spatial- and frequency-domain degrees of freedom is under study. Fully exploiting the improved degrees of freedom generated by cooperative cross-tier precoder, we devise an intra-tier precoder with little performance degradation and low complexity; we propose a novel joint optimization of opportunistic interference-free transmission in spatial and frequency domains, to extract degrees of freedom and improve the whole capacity of network; the opportunistic interference-free transmission with multiple cells is further optimized to shrink the interference subspace; we finally optimize the robust signal alignment scheme with limited channel estimation error. The key issues to be addressed include joint optimization in spatial and frequency domains, the robust design considering the channel estimation errors, and the solution for complicated optimization problem well balancing performance and complexity. We aim to achieve some innovative fruits on joint spatial- and frequency-domain opportunistic interference-free transmission, which are expected to provide fundamental basis for interference management in future mobile communication systems.

英文关键词： interference alignment;robust optimization