考虑充水模型和最小特征值约束的MIMO系统性能评价

Nur Afroza Khurshid, M. Islam, M. Amin
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引用次数: 0

摘要

本文对等功率和充水两种模型进行了仿真,比较了它们在多输入多输出环境下的性能。模型中加入了快速衰落和阴影效应。从特征值和等效非耦合多输入多输出链路的概率密度函数求出单个链路成功传输所需的最小特征值。基于信道矩阵特征值的概率密度函数,分析了阵列天线单元数对非耦合信道最小特征值的影响。分析表明,截止特征值随天线单元数和接收信号信噪比的增加而减小。
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Performance evaluation of MIMO system incorporating water filling model and minimum eigenvalue constraints
In this paper, both equal power and water filling models are simulated for comparison of their performance in a multiple-input multiple-output environment. The effects of fast fading and the shadowing effects have been incorporated in the models. Minimum eigenvalue required for successful transmission for individual link is evaluated from the probability density functions of eigenvalue and equivalent uncoupled multiple-input multiple-output link. Impact of the number of antenna elements of an array on the minimum eigenvalue of an uncoupled channel is analyzed based on probability density function of eigenvalue of the channel matrix. The analysis shows that the cutoff eigenvalue decreases with increase in the number of antenna elements and signal to noise ratio of the received signal.
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