Based on the problem that the observation matrix in the traditional target positioning algorithm in wireless sensor networks, does not satisfy Restricted Isometry Property, a sparse target positioning algorithm based on LU decomposition is proposed. The algorithm applies the principle of compressed sensing to the grid target positioning problem based on the Received Signal Strength Indication. The LU decomposition method is used to decompose the observation matrix, which not only satisfies Restricted Isometry Property, but also reduces the impact on the original signal sparsity. After the experiment of the UAV positioning system, it is proved that the positioning performance of the target positioning algorithm based on LU decomposition is superior to that of the sparse node positioning algorithm based on Orth preprocessing.
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