| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for estimating the position of a diffusive article from only measurement data and performing clustering of a wavelet group and diffusive article position estimation in connection with each other.SOLUTION: The method includes: calculating, for each particle, a distance between propagation data and cluster-assumption data, where the former is obtained from measurement data of an electromagnetic wave received by a receiver, while the latter is an assumption value of propagation data of a cluster assumed by using a diffusive article estimation position; correlating, for each particle, a smallest-distance cluster with another cluster; calculating, as an evaluation value, for each particle, a ratio of the sum of electric power of propagation data whose distance is equal to or less than a threshold to the sum of electric power of propagation data of all measurement points and all wavelets; performing resampling in accordance with the evaluation value to calculate a particle; determining, as estimation-target data, for each particle calculated by the resampling, propagation data whose distance is the largest; estimating, for each particle, the position of the diffusive article anew, using the estimation-target data; and assuming cluster assumption data of a new cluster corresponding to the estimated diffusive article. |
