Abstract
The signal enhancement algorithm of Cadzow is developed in the context of best approximation theory and Combettes' method of successive projections, which is a generalization of the method of projection on convex sets. The relevant mathematical methods are surveyed. Applications of the signal enhancement algorithm to direction-of-arrival array signal processing for narrow-band and wide-band sources, data interpolation, signal detection, and x-ray fluorescence spectrum processing are presented.
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