Chapter 8
Convolutive mixtures
8.1 Introduction and mixture model
The blind source separation problem is often considered in the case of instantaneous mixtures. This means that at a given moment in time, the observations depend on the values of several source signals at the same time. In the case of a linear mixture, which is most commonly encountered, any observation is a linear combination of the sources at the same time.
However, the sources may contribute to the mixture with several different delays: this may happen in several application domains such as telecommunications – where channel models often include multipath propagation; audio processing – reverberation may introduce delays; and biomedicine ...
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