中图分类号：TN98 文献标志码：A DOI: 10.16157/j.issn.0258-7998.233844 中文引用格式： 张毅，王灏钰. 一种基于Mesh网络的混合AOA/RSSI协作定位算法[J]. 电子技术应用，2023，49(8)：76-81. 英文引用格式： Zhang Yi，Wang Haoyu. A hybrid AOA/RSSI cooperative localization algorithm based on mesh networks[J]. Application of Electronic Technique，2023，49(8)：76-81.
A hybrid AOA/RSSI cooperative localization algorithm based on mesh networks
Zhang Yi，Wang Haoyu
(School of Communication and Information Engineering， Chongqing University of Posts and Telecommunications， Chongqing 400065， China)
Abstract： Traditional hybrid Angle-Of-Arrival (AOA)/Received Signal Strength Indicator (RSSI) localization methods require all of the anchor nodes to be equipped with the large scale of antenna arrays to achieve high accuracy of localization. To solve the problem of low localization accuracy under the resource constraint of anchor nodes, a hybrid AOA/RSSI cooperation localization method based on mesh networks was proposed. With only one central anchor node providing AOA angle information, the angle and distance information of real and virtual anchor nodes was integrated to estimate the preliminary localization by using the least square method. Then, the cooperative communication and ranging information between unknown nodes was added to the overall localization process, and the localization estimation problem was converted into an unconstrained non-linear optimization problem, higher weights were given to the short-range links, and the cooperative localization was solved by iterative solving. Simulation results show that the proposed algorithm effectively improves the localization accuracy under the resource constraint of anchor nodes.
Key words : cooperative localization；AOA；RSSI；mesh networks；least square method；unconstrained non-linear optimization