Aiming at multi-microphones signal de-noising problem in acoustic array, a signal de-noising method based on information fusion and improved ensemble empirical mode decomposition (EEMD) was proposed in this paper. Firstly, an improved EEMD algorithm, which took the ensemble minimum effective frequency of multi-channel signals as the cut-off frequency of EEMD, was introduced. In this algorithm, the IMF components were decomposed effectively with less mode mixing phenomenon and false IMF components; Secondly, through introducing time delay vector close rule(TDVCR) and data consistency fusion theory, the weight matrix of IMFs were computed according to the correlation of corresponding IMFs, and then the de-noising signals were reconstructed with the IMF components and the weight matrix; Finally, through the semi-physical simulation experiment of acoustic array and the comparison with the traditional EMD signal de-noising, the effectiveness and practicability of the proposed method was verified.
邸忆1,顾晓辉1,龙飞2. 一种基于声阵列信息融合及改进EEMD的信号降噪方法[J]. 振动与冲击, 2017, 36(15): 133-141.
Di Yi1 Gu Xiaohui 1 Long Fei2. A signal de-noising method for multi-microphones array based on information fusion and improved EEMD. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(15): 133-141.
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