On the Covariance Matrix and Diversity Performance Evaluation of Compact Multiport Antenna Systems
On the Covariance Matrix and Diversity Performance Evaluation of Compact Multiport Antenna Systems
复制标题
紧凑型多端口天线系统的协方差矩阵和分集性能评估
DOI：
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发表时间：
2017
影响因子：
5.7
通讯作者：
P. Karadimas
中科院分区：
文献类型：
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作者：
V. Papamichael;P. Karadimas
在这篇文章中，我们提出了一种新的电磁方法，在早期设计阶段确定紧凑型多端口天线（MPA）系统的协方差矩阵。进一步深入了解这一领域提供，与现有的方法相反，它严格依赖于MPA系统的互惠原则。因此，传播环境、终端条件和MPA辐射特性作为影响性能的独立因素的影响在物理上被合并。假设接收信噪比（SNR）的累积分布函数和概率密度函数的数学表达式可用，则可以通过分集天线增益（DAG）在以下方面分析研究性能：1）特定中断概率（OP）水平下的SNR增强（即DAG-OP）和2）平均SNR降低以实现特定的平均误码率（BER）（即DAG-BER）。说明性的例子与紧凑的MPA系统的性能评估。所采用的分集技术是发射天线选择/最大比合并，这是第一次解析研究采用现实的MPA系统。与现有公布的结果进行比较，进一步证明了所提出的方法的有效性和实用性。
In this communication, we present a new electromagnetic methodology that determines the covariance matrix of compact multiport antenna (MPA) systems at the early design stage. Further insight into this field is provided, as contrary to existing methodologies, it rigorously relies on the reciprocity principle of MPA systems. Thus, the impact of propagation environment, termination conditions, and MPA radiation characteristics as independent factors affecting performance is physically incorporated. Provided the availability of mathematical expressions for the cumulative distribution function and probability density function of received signal-to-noise ratio (SNR), performance can then be analytically studied via the diversity antenna gain (DAG) in terms of: 1) SNR enhancement at a specific outage probability (OP) level (that is DAG-OP) and 2) average SNR reduction for achieving a specific average bit error rate (BER) (that is DAG-BER). Illustrative examples with performance evaluation of compact MPA systems are presented. The adopted diversity technique is the transmit antenna selection/maximal ratio combining, which is analytically studied employing realistic MPA systems for the first time. Comparisons with existing published results further demonstrate the validity and usefulness of the proposed methodology.