【作者】 彭宏利；

【导师】 刘其中；

【作者基本信息】 西安电子科技大学 ， 电磁场与微波技术， 2005， 博士

【摘要】 本文着重研究了MIMO及WCDMA MIMO系统性能对典型室内环境的依赖关系。为此首先对典型室内和室内/外复合电磁环境进行定义和分类,基于电磁场基本理论,包括几何光学理论、模式谱理论,借助赫兹矢位,完成了定义环境中电磁波传播特性的建模,所述环境包括一维、二维和三维平面分层各项同性媒质/复合媒质(各项异性媒质)环境,通过将模型所得理论值与文献实测结果对比验证了模型的有效性;从无线通信角度研究了MIMO电磁场复基带信号模型问题同时也研究了基于本文定义的3种基本电磁环境物理模型的电磁场信道建模技术;基于定义的室内电磁场信道模型研究了MIMO技术可提供的理论系统容量,通过将系统容量理论值与实测值比对验证所做工作的有效性;系统研究和评估了在所定义环境中WCDMA STOB发射+MMSE Beam Forming自适应接收MIMO系统的性能;开发了基于WCDMA MIMO系统的终端阵列天线;最后考察了MIMO终端阵列互耦对WCDMA MIMO系统性能的影响等5个方面的技术问题。更多还原

【Abstract】 The dependence of the WCDMAMIMO system performance on typical indoorsurround-ings is studied in this dissertation by using deterministic electromagnetic (EM)method and testing verification method. Five aspects of key technologies are involvedin the problem. These technologies are related to the EM definition and classification ofindoor surrounding, the analytical presentation of the electromagnetic complexbaseband signals and the electromagnetic channel modeling in the defined surround-ings based on the fundamental EM theory including geometrical optical and EM modespectrum method aided by the Hertzian vector potential basic concepts. The evaluationof the dependence of the system capacity on the defined surroundings parameters isinvestigated based our channel model. Our results are also verified by the publicliterature’s measurements. A new method of the system interruption suppression namedWCDMA STOB transmitting+ MMSE beamforming is developed and the systemperformance improvement is shown by the system level simulation results. A novelWCDMA MIMO terminal antenna array is developed and the positive effect of themutual coupling between the antenna elements on the WCDMA STOB transmitting+MMSE beamforming system performance is obtained.更多还原