关键词: 定位, 节点, 均方根误差, 无线传感器网络, 最大似然

Abstract: The localization accuracy of traditional maximum likelihood algorithm is not high. The complexity of asymmetric link for distance vector algorithm is higher and the node localization accuracy is low and computational complexity is too high. Combined with two-dimensional directional sensing network, this paper establishes node diffusion mechanism, and considers the root mean square error and attenuation coefficient, the quantitative relationship between unknown nodes and positioning error, and the signal attenuation in free space. In view of the traditional wireless sensor node localization algorithm, wireless sensor networks based on non-uniform environment, this paper proposes a node accuracy positioning algorithm. The simulation results reveal that the node localization accuracy of proposed algorithm is superior to the traditional maximum likelihood algorithm and asymmetric link for distance vector algorithm.

Key words: positioning, node, root mean square error, wireless sensor network, maximum likelihood