Fig. 1. Principle of blind source separation

Fig. 2. Flow chart of DLM-FastICA algorithm

Fig. 3. Source signal waveforms

Fig. 4. Source signal spectra

Fig. 5. Mixed signals at receiver

Fig. 6. Signals extracted by FastICA algorithm

Fig. 7. Signals extracted by DLM-FastICA algorithm

Fig. 8. Similarity coefficients between extracted signals and source signals. (a) Extracted signal 1 and source signal; (b) extracted signal 2 and source signal; (c) extracted signal 3 and source signal; (d) extracted signal 4 and source signal

Fig. 9. Comparison of average similarity

Fig. 10. Comparison of algorithm convergence

Fig. 11. Comparison of algorithm iteration times