Linear System Approximation by Differential Analyzer Simulation of Orthonormal Approximation Functions
- 1 June 1959
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IRE Transactions on Electronic Computers
- Vol. EC-8 (2) , 204-209
- https://doi.org/10.1109/tec.1959.5219523
Abstract
Various analytic procedures have been proposed for minimum integral-square-error approximation of prescribed linear systems; however, they often involve computational difficulties. In the procedure developed in this paper, a group of N linear approximating systems with orthonormal impulse responses øn(t) are realized by operational amplifier circuits. When h(-t) forces the systems (h(t) is the impulse response of the prescribed system) it is found that their outputs at t = 0 are an, the coefficients in {see the Equation in PDF File} the approximate impulse response. The following points relative to the approximation procedure are developed: constrained and weighted integral-square-error approximations, derivation and realization of orthonormal functions, physical realization of h*(t), evaluation of error h(t)-h*(t), and analysis of computer errors. Several approximation examples are given.Keywords
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