An improved demodulation algorithm for water acoustic commnuication based on IMF energy spectrum and wavelet analysis

An improved demodulation algorithm is presented for underwater acoustic communication. This method originates from the IMF energy spectrum and wavelet analysis. This paper proposes a new effective algorithm for the adaptive selection of IMFs for the EMD. The mode components are decomposed using empirical mode decomposition from the original signals and transformed into energy spectrum vectors. The method has better performance for shallow-sea water acoustic communication. The reliability and precision of this presented method are verified by field experiments.