| 无线传感器网络波束合成的影响因素研究 |
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| 引用本文： | 尤览,刘发林.无线传感器网络波束合成的影响因素研究[J].中国科学技术大学学报,2010,40(4). |
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| 作者姓名： | 尤览 刘发林 |
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| 作者单位： | 中国科学技术大学电子工程与信息科学系,安徽合肥,230027 |
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| 摘 要： | 将无线传感器网络WSN(wireless sensor networks)与天线阵波束合成技术相结合,可用以实现WSN的远距离无线通信.与以往节点选用各向同性天线时的情况不同,本文中节点选用定向天线.针对由此引入的天线轴角度偏移问题,具体分析了WSN中常见的节点失效和位置误差对合成波束方向图所带来的影响;通过对节点的辐射功率调整,在保持合成方向图主瓣特性的基础上,有效地降低了旁瓣电平;为增大网络的覆盖面积,可以在一定范围内对节点间距进行扩展,经研究发现,节点间距的扩展范围与所选用天线的波瓣特性有相对固定的约束关系.
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| 关 键 词： | 定向天线 波束合成 天线轴偏移 节点失效 位置误差 辐射功率调整 节点间距扩展 |
A study of the influencing factors of wireless sensor network beamforming |
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| YOU Lan,LIU Falin.A study of the influencing factors of wireless sensor network beamforming[J].Journal of University of Science and Technology of China,2010,40(4). |
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| Authors: | YOU Lan LIU Falin |
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| Institution: | YOU Lan,LIU Falin(Department of Electronic Engineering , Information Science,USTC,Hefei 230027,China) |
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| Abstract: | Wireless sensor networks(WSN) technology was combined with antenna array beamforming to realize WSN's long range communication.Instead of using isotropic antennas as reported in the literatures,all nodes in this paper were equipped with directional antennas for beamforming.The influence of sensor node failure and position error on the combined beam pattern was analyzed considering the antenna beam inclination.The node's radiation power adjustment was studied to reduce the side lobe level effectively as the ... |
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| Keywords: | directional antenna beamforming antenna beam inclination node failure position error radiation power adjustment node distance extension |
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