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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Exploiting Capture Diversity for Performance Enhancement of ALOHA-Based Multi-Static Backscattering Systems in the 6G Perspective
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Exploiting Capture Diversity for Performance Enhancement of ALOHA-Based Multi-Static Backscattering Systems in the 6G Perspective

机译：在6G透视图中利用捕获性能提升性能增强性能增强

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摘要

In this paper, we consider the emerging context of ALOHA-based multi-static backscattering communication systems. By assuming an architecture consisting of a set of passive backscattering nodes, an illuminator, and a set of spatially dislocated receivers, we firstly propose a cross-layer framework for performance analysis. The model jointly accounts for the shared wireless channel, including fading and capture effect, and channel contention strategy, which is regulated by a Framed Slotted ALOHA protocol. Furthermore, based on the inherent macroscopic diversity offered by the multi-static settings, we introduce the concept of capture diversity, which is shown to enable multiple packet detection in slots with multiple transmissions. In order to characterize the multiple access interference and approximate the capture probabilities, we enforce a log-normal approximation of the inverse Signal-to-Interference Ratio that relies on moment matching. Numerical results show the impact of deployment scenarios and the relative positions of illuminator, backscattering nodes, and receivers on the system normalized throughput. We show how the number of detection points impacts the system performance under various channel conditions. Moreover, the accuracy of the proposed approximation rationale is validated via Monte Carlo simulations. Finally, we analyze the optimal frame length in the presence of capture diversity.
机译：在本文中，我们考虑基于Aloha的多静态反向散射通信系统的新兴语境。通过假设由一组被动反向散射节点，发光器和一组空间错位的接收器组成的架构，我们首先提出了一种用于性能分析的横梁框架。该模型共同占共享无线信道，包括衰落和捕获效果，以及由框架的开槽Aloha方案调节的渠道竞争策略。此外，基于多静态设置提供的固有宏观分集，我们介绍了捕获分集的概念，该概念显示在具有多个传输的时隙中启用多个数据包检测。为了表征多次访问干扰并近似捕获概率，我们强制执行依赖于时刻匹配的逆信号到干扰比的日志正常近似。数值结果显示了部署方案的影响和发光器，反向散射节点的相对位置，以及对系统标准化吞吐量的影响。我们展示了检测点的数量如何影响各种信道条件下的系统性能。此外，通过蒙特卡罗模拟验证了所提出的近似基本原理的准确性。最后，我们在存在捕获分集的情况下分析最佳框架长度。

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