Abstract:To solve the problem of error propagation and accumulation in distributed multihop iterative localization process in wireless sensor networks, the localization error influence of anchor geometry is firstly analyzed and an error control algorithm based on Geometric Dilution Of Precision (GDOP) is proposed. By designing a delicate weighting scheme, the error magnification effect of geometry is quantitatively involved in terms of weight which effectively control error propagation in every iterative step and improve distributed localization accuracy of the whole network. The performance evaluation shows that, compared with classic iterative localization algorithm based on least squared estimation and another weighted algorithm based on iterative round, localization precision of GDOP weighted algorithm is improved by 25% and 15% respectively.
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