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为提高无线传感器网络(WSN)定位系统的定位精度,本文从软件及硬件两方面入手,根据系统特点研究控制算法、开发控制程序、搭建外围电路,实现了电小可操控寄生阵列辐射器(ESPAR)智能天线与nanoPAN5375 WSN定位系统相结合,使后者可根据通信质量控制前者的波束指向,使其始终指向通信质量较好的方向,从而提高系统信噪比、信干比,最终提高定位精度。之后在办公室环境中进行了定位实验,N次重复实验所得定位结果均值的定位误差为0.36m,标准差为0.15 m。本文对于研究如何提高WSN定位系统的定位精度具有重要意义。
In order to improve the positioning accuracy of Wireless Sensor Network (WSN) positioning system, this paper starts with software and hardware, studies control algorithm, develops control program and builds peripheral circuits according to the characteristics of the system, and realizes a small electrically controlled parasitic array radiator (ESPAR ) The combination of the smart antenna and the nanoPAN5375 WSN positioning system enables the latter to control the beam pointing of the former according to the communication quality so that it always points in the direction of better communication quality so as to improve the signal to noise ratio and signal to interference ratio of the system and ultimately improve the positioning accuracy . Afterwards, the positioning experiment was conducted in the office environment. The positioning error of the mean value of the positioning results obtained from N repetitive experiments was 0.36m and the standard deviation was 0.15m. This article is of great significance for studying how to improve the positioning accuracy of WSN positioning system.