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.
['Pierre Jallon', 'Antoine Chevreuil', 'Philippe Loubaton', 'Pascal Chevalier']
Separation of convolutive mixtures of linear modulated signals using constant modulus algorithm