Separation of convolutive mixtures of linear modulated signals using constant modulus algorithm

The issue of separating linear mixtures of independent linearly modulated signals stemming from unknown digital communication systems is addressed. The baud-rates of the various transmitted signals are in particular unknown and possibly different. Therefore, sampled versions of the received signal are cyclostationary sequences. Despite the non-stationary environment of the data, Godard´s algorithm is shown to achieve separation in rather general contexts.