Node Topology Effect on Target Tracking Based on UWSNs Using Quantized Measurements
Node Topology Effect on Target Tracking Based on UWSNs Using Quantized Measurements
复制标题
使用量化测量的基于 UWSN 的节点拓扑对目标跟踪的影响
DOI：
10.1109/tcyb.2014.2371232
复制
发表时间：
2015-10-01
影响因子：
11.8
通讯作者：
Zhang, Senlin
中科院分区：
文献类型：
--
作者：
Zhang, Qiang;Liu, Meiqin;Zhang, Senlin
一方面，由于水下无线传感器网络（UWSNs）的能量和带宽限制，局部数据量化/压缩不仅是必要的，而且是水下无线传感器网络设计的重要组成部分；另一方面，由于水下节点为基于UWSNs的目标跟踪提供测量，由水下节点组成的节点拓扑结构可能会影响目标跟踪的性能。本文采用量化测量的方法研究了节点拓扑结构对UWSNs目标跟踪的影响。首先，利用几何知识，定性分析了四种典型拓扑结构对量化目标跟踪的影响；四种典型拓扑包括两个节点相互靠近、三个节点相互靠近、三个节点共线性、三个节点形成正三角形。其次，在量子化测量条件下，推导了后验Cramer-Rao下界（PCRLB）与节点位置的关系，以评估任意拓扑；第三，设计了目标跟踪方案，该方案由最小化PCRLB的最优拓扑选择方案、最小化能量消耗的最优融合中心选择方案和量化测量的多传感器粒子滤波器组成。最后，仿真结果表明了该方案的有效性。
On one hand, due to the energy and bandwidth constraint of underwater wireless sensor networks (UWSNs), local data quantization/compression is not only a necessity, but also an integral part of the design of UWSNs; on the other hand, since underwater nodes provide measurements for target tracking based on UWSNs, node topology, which is made up of the underwater nodes, may affect the performance of target tracking. This paper studies the effect of node topology on the target tracking in UWSNs using quantized measurements. Firstly, by using the knowledge of geometry, the effects of four typical topologies on target tracking using quantized measurements are analyzed qualitatively. The four typical topologies include two nodes are close to each other, three nodes are close to each other, three nodes are co-linear, and three nodes form a regular triangle. Secondly, under the condition of quantized measurements, the relationship between the posterior Cramer-Rao lower bound (PCRLB) and node's position is derived to evaluate the arbitrary topology. Thirdly, our target tracking scheme consisting of the optimal topology selection scheme by minimizing PCRLB, the optimal fusion center selection scheme by minimizing energy consumption, and the multisensor particle filter with quantized measurements is designed. Last, simulation results show the effectiveness of the proposed scheme.