摘 要 无线传感器网络（WSN，Wireless Sensor Network）是近年来迅速进展并受到普遍重视的新型网络技术，它的出现和进展给人类的生活和生产的各个领域带来了深远的影响。无线传感器网络节点定位技术是无线传感器网络应用讨论的基础。目前，已有多种定位技术被应用于室内定位中，尤其是基于接收信号强度（RSSI，Received Signal Strength Indication）的定位技术以其低功耗、低成本、易于实现等优点，得到了无线传感器网络讨论学者们的青睐。本文重点讨论了基于 RSSI 的室内定位的关键技术，主要包括定位模型分析和定位算法设计。首先，为了获得较为精确的定位，根据 RSSI 测距原理和无线信号传播衰减模型在设定的室内环境进行多次实验，通过计算及均值处理等方法反复调整以获得标准的定位模型参数，得到高精度的等效距离。接着，根据三边定位算法原理简化定位算法，建立更为简单的定位模型，采纳双边定位得到两个可能的定位点，再利用 RSSI 测距原理对两个定位点进行择优选择确定定位点。最后，在 Arduino 开发平台上对参考节点与未知节点这两类 iDuino 节点的室内定位模型进行了软件开发设计和程序开发。在设定的室内环境部署iDuino 节点，搭建实验定位模型，并实现了定位。 关键词：无线传感器网络，节点，室内定位，RSSI，ArduinoABSTRACT Wireless sensor network (WSN) is developed rapidly and universally emphasized as a new network technology in recent years, the advent and development of WSN have had a profound and lasting impact on the life and all areas of production of human beings. Wireless nodes localization technology is the basis in the application and studies of wireless sensor network. There are a variety of positioning technology have been used in indoor location at present, especially the based on RSSI (received signal strength) positioning technology gets a great preference from many scholars of studies of wireless sensor network with the advantages of low power consumption, low cost and easy to realize.This paper mainly studies the key technology of indoor positioning based on RSSI, which mainly includ...
