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Projection-assisted Indoor Attenuation Parameter Compression based on Curve Fitting

Channel state information (CSI) describes the at-tenuation factor of signals on each propagation path. This paper proposes a oblique projection assisted indoor attenuation parameter compression algorithm based on curve fitting. First, a oblique projection operator is constructed to process the original CSI data. Then the curve fitting based on the least-squares algorithm is performed to realize the compression. The experimental results show that the proposed algorithm has a considerable compression ratio under the same fitting residual.