Optimizing the Mutual Information of Frequency-Selective Multi-Port Antenna Arrays in the Presence of Mutual Coupling
Optimizing the Mutual Information of Frequency-Selective Multi-Port Antenna Arrays in the Presence of Mutual Coupling
复制标题
互耦存在下选频多端口天线阵列互信息优化
DOI：
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发表时间：
2022
影响因子：
8.3
通讯作者：
R. Heath
中科院分区：
文献类型：
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作者：
Sandy Saab;A. Mezghani;R. Heath
随着多天线无线系统使用更大的带宽，天线阵列的频率选择性开始影响速率。通过优化紧凑型天线阵列中可实现的速率，我们提出了一种系统模型，该模型结合了宽带物理上可实现的单输入多输出（SIMO）和多输入单输出（MISO）天线系统的互耦（MC）效应。对于 SIMO 系统设置，我们提取两种不同天线阵列配置（并行和共线）的噪声相关矩阵。我们优化每个排列中的元件间间距，同时最大化可实现的速率并固定发射功率。然后，我们将两种紧凑型天线设计与完美匹配的单个全向天线进行比较，同时考虑 MC。同样，对于 MISO 天线系统，我们得出了最佳波束形成器，该波束形成器使用与 SIMO 系统相同的天线配置来最大化可实现的速率。然后，我们研究了 MC 的影响并开发了一种新的宽带天线阵列单端口匹配技术。最后，我们提供互易图来比较使用不同通道模型的 SIMO-MISO 系统的性能。
As larger bandwidths are used in multiple antenna wireless systems, the frequency selectivity of the antenna arrays starts to impact rate. Motivated by optimizing the achievable rate in compact antenna arrays, we present a system model that incorporates the effects of mutual coupling (MC) of wideband physically realizable single-input multiple-output (SIMO) and multiple-input single-output (MISO) antenna systems. For the SIMO system setup, we extract the noise correlation matrices for two different antenna array configurations (parallel and co-linear). We optimize the inter-element spacing in each alignment while maximizing the achievable rate and fixing the transmit power. Then, we compare the two compact antenna designs to a perfectly matched single omni-directional antenna while accounting for MC. Likewise, for the MISO antenna system, we derive the optimal beamformer that maximizes the achievable rate using the same antenna configurations as the SIMO system. Then, we study the impact of MC and develop a new single-port matching technique for wideband antenna arrays. Finally, we provide reciprocity plots to compare the performance of the SIMO-MISO systems using different channel models.