Signal Separation Method Based on Improved Bandwidth ACMD
Aiming at the problem of separating multi-component signals caused by the overlap of multiple radia-tion sources in complex electromagnetic environment,a signal separation method based on improved bandwidth adaptive chirp mode decomposition(ACMD)is proposed.The spectral concentration index is used to estimate the instantaneous frequency of each signal component,and the estimated instantaneous frequency is used as the preset frequency for the improved algorithm.The recursive framework and the improved bandwidth adaptive update method are used to iterate each signal component.Until the remaining signal energy is less than the threshold,all signal separation is completed.Simulation experiments show that this method can separate multi-component signals in complex electromagnetic environ-ment,and has better separation performance and noise resistance than existing algorithms,especially for adjacent sig-nals.
signal separationcomplex electromagnetic environmentbandwidth ACMDspectral concentration index
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