快变信道下酉空时调制系统设计与性能分析研究

项目名称： 快变信道下酉空时调制系统设计与性能分析研究

项目编号： No.61271245

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 郝莉

作者单位： 西南交通大学

项目金额： 80万元

中文摘要： 在快变信道条件下，收发端很难对实时信道状态进行准确的跟踪与估计，这致使传统的基于信道估计的解调与检测方法性能大幅度降低甚至完全失效。本项目拟针对非相干的酉空时调制技术展开研究，由于不需要实时的信道状态信息，因此酉调制技术可以避免复杂的信道估计和训练序列开销。与现有的天线选择、协作通信等技术相结合，酉调制在快变信道下具有较为广阔的应用前景。本项目将面向高移动场景下的无线通信系统，针对不需要实时状态信息或只有不完整状态信息的快变信道，从酉调制信号统计特性分析出发，开展天线选择酉调制系统、中继与多点协作酉调制系统的研究，通过快变信道下酉调制系统容量与性能分析、技术方案与星座图设计、无线资源管理等方面的研究工作形成较为完善的酉空时调制理论与技术体系，为快变信道下的酉调制系统设计提供指导，其成果将具有较为重要的理论意义和实用价值。v

中文关键词： 酉空时调制；乘积叠加；盲干扰对齐；快变信道；高铁通信

英文摘要： In rapidly changing channel, it is difficult for the transmitter and receiver to track and estimate the real channel state perfectly, which results in the significant performance degradation or even failure of demodulation and detection. As a non-coherent technology which requires no real-time channel state information, unitary space-time modulation can avoid complex channel estimation as well as overhead associated with training sequence. Combined with existing technologies involving antenna selection and coordinated communications, unitary modulation can find its extensive applications in rapidly-changing channel. Aiming at wireless communications in high-mobility scenario, this project considers the channel with no or only partial state information to analyze the statistic properties of unitary modulated signals so as to perform researches in antenna-selection unitary system, relay unitary modulation as well as coordinated multipoint unitary communications. Through researches on capacity and performance analysis, technical scheme and constellation design, wireless resource management, the target of the project is to build a relatively comprehensive theory and technical structure of unitary space-time modulation in rapidly changing channel to provide guide to system design.

英文关键词： unitary space-time modulation；multiplicative superposition；blind interference alignment；fast time-varing channel；high-speed railway communicaitons