无线网络中的分布式波束形成建模

K. Hardwick, D. Goeckel, D. Towsley
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引用次数: 6

摘要

无线自组织网络中的分布式波束形成技术有望大大提高网络吞吐量。然而,与传统的固定阵列的波束形成不同,协作形成阵列的节点的随机位置导致随机波束方向图。特别是,侧瓣的位置和大小可以变化很大,并对并发传输产生重大影响,并发传输是分布式波束形成实现的大部分吞吐量增益的来源。在这里,我们提出了一个简单的模型来捕捉这种随机性,然后使用该模型来考虑大型自组织无线网络的平均吞吐量。将数值结果与对定向天线波束采用常用的楔形饼近似所得到的结果进行了比较,结果表明,在旁瓣干扰不可忽略的区域,差异是显著的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Modeling distributed beamforming in wireless networks
Distributed beamforming in wireless ad hoc networks has the promise of greatly improving network throughput. However, unlike traditional beamforming from a fixed array, the random locations of the nodes collaborating to form the array lead to a random beam pattern. In particular, the position and size of side lobes can vary greatly and have a significant impact on the concurrent transmissions that are the source of much of the throughput gain realized from distributed beamforming. Here, we present a simple model that captures this randomness and then use the model to consider the average throughput of a large ad hoc wireless networks. Numerical results are compared to those obtained if one employs the oft-used pie-wedge approximation for a directed antenna beam, and the difference is shown to be significant in regions where the side lobe interference is non-negligible.
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