Abstract
In this paper, we study the properties of information matrices of the difference operator or the so-called delta (/spl delta/) operator-based algorithms for adaptive signal processing. We show that the conditioning of a transformed information matrix in the /spl delta/ domain is always better than that of the original information matrix in the conventional q domain for ill-conditioned problems. The results obtained in this paper give an explanation of the advantages of using delta operator algorithms for adaptive signal processing that have been developed. The analysis in this paper also helps to clarify the problem about the effect of /spl Delta/ in the delta operator algorithms and justify the use of sampling interval as /spl Delta/ in most cases when the ill conditioning is caused by fast sampling of continuous time systems.
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