具有(虚拟)发射/接收阵列的分层水声传感器网络

A. Stefanov, M. Stojanovic
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引用次数: 3

摘要

我们考虑了一种分层的水声传感器网络结构,其中传感器和采集器站在不同的层中工作。这种分层结构的动机是声学水下传输介质的特性,即对于每一个传输距离,存在一个使窄带信噪比最大的工作频率。因此,传感器和收集站被分配不同的工作频率。我们假设传感器和集电极站在有限的传感场区域上均匀分布。传感器被组织成集群,形成虚拟的发送/接收阵列。另一方面,集线站配备了位于同一位置的发射/接收阵列。我们采用通信理论的方法,研究了网络持续跳数、端到端帧错误概率、功率和带宽分配之间的相互关系。该分析是在假设存在Ricean衰落和来自同一层次内其他节点的干扰的情况下进行的。我们给出了数值例子来说明网络性能,并证明存在优选的工作频率,以确保网络运行,而采集器网络和传感器网络之间没有任何交叉干扰。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hierarchical underwater acoustic sensor networks with (virtual) transmit/receive arrays
We consider a hierarchical underwater acoustic sensor network architecture in which the sensors and the collector stations operate in distinct layers. The hierarchical architecture is motivated by the property of the acoustic underwater transmission medium that for each transmission distance there exists an operating frequency for which the narrow-band signal-to-noise ratio is maximized. The sensors and collector stations are consequently allocated different operating frequencies. We assume a uniform distribution of both sensors and collector stations over the finite area of the sensing field. The sensors are organized into clusters forming virtual transmit/receive arrays. The collector stations on the other hand are equipped with co-located transmit/receive arrays. We adopt a communication theoretic approach and study the interdependence of the sustainable number of hops through the network, end-to-end frame error probability, power and bandwidth allocation. The analysis is performed under the assumption of Ricean fading and interference from other nodes within the same layer of the hierarchy. We present numerical examples that illustrate the network performance and demonstrate that there are preferred operating frequencies which ensure network operation without any cross-interference between the collector network and the sensor network.
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