Abstract
We have shown previously that non-stationary signals recorded in a static multi-path environment can often be recovered by simultaneously decorrelating varying second order statistics. As typical sources are often moving, however, the multi-path channel is not static. We present here an on-line gradient algorithm with adaptive step size in the frequency domain based on second derivatives, which we refer to as multiple adaptive decorrelation (MAD). We compared the separation performance of the proposed algorithm to its off-line counterpart and to another decorrelation based on-line algorithm.
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Parra, L., Spence, C. On-line Convolutive Blind Source Separation of Non-Stationary Signals. The Journal of VLSI Signal Processing-Systems for Signal, Image, and Video Technology 26, 39–46 (2000). https://doi.org/10.1023/A:1008187132177
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DOI: https://doi.org/10.1023/A:1008187132177