LINEAR PERIODICALLY TIME-VARYING DISCRETE-TIME SYSTEMS - ALIASING AND LTI APPROXIMATIONS

摘要

Linear periodically time-varying (LPTV) systems are abundant in control and signal processing; examples include multirate sampled-data control systems and multirate filter-bank systems. Ln this paper, several ways are proposed to quantify aliasing effect in discrete-time LPTV systems; these are associated with optimal time-invariant approximations of LPTV systems using operator norms. (C) 1997 Elsevier Science B.V. [References: 14]