Page 207 - Mechanical Engineers' Handbook (Volume 2)
P. 207

196   Signal Processing



























                                    Figure 6 Frequency response to a fifth-order inverse Tchebyshev filter.


           2.5  Arbitrary Frequency Response Curve Fitting by Method of Least Squares
                          It is possible to design a filter to approximate a desired frequency response F( ) by the
                          method of least squares. Consider a transfer function in factored form as
                                                               M
                                                               i i  s   
 i
                                                     H(s)   G                                 (18)
                                                               N
                                                               k 1  s   p k



























                                        Figure 7 Frequency response to a fifth-order elliptical filter.
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