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多天线构成的多输入多输出MIMO(Multiple-Input Multiple-Output)信道是B3G/4G系统的关键技术之一。文章建立下垫三维粗糙面的MIMO信道模型,用基尔霍夫(KA,Kirchhoff approximation)近似随机粗糙面散射的数值计算方法研究下垫粗糙面产生的随机多路径传输对MIMO信道矩阵的影响,并数值地讨论接收、发射天线阵列位置以及下垫粗糙面几何参数对MIMO系统信道容量的影响。结果表明,双站距离大、天线高度低时,下垫随机粗糙面对MIMO信道容量的影响显著。当天线阵元间距小时,下垫粗糙面将显著增大MIMO系统信道容量;当天线间距大时,粗糙面减小MIMO系统信道容量。 更多还原

【Abstract】 Multiple input-multiple output(MIMO) system has becomes one of key techniques for developing B3G/4G systems.In this paper,a model of the MIMO system above a 3-D random rough surface is presented.Using Monte Carlo method,underlying random rough surface is realized.The Kirchhoff approximation(KA) is applied to numerical calculation of rough surface scattering for implementing multi-path propagation and the channel transfer matrix of MIMO system.It numerically shows the dependence of the MIMO syste... 更多还原