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File: Processing Pdf 180379 | Dsp Lecture11a
digitalsignalprocessing lecture11 fall 2010 2k8 5th semester tahir muhammadtahir muhammad tmuhammad 07 yahoo com content and figures are from discrete time signal processing 2e by oppenheim shafer and buck 1999 ...

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                   DIGITALSIGNALPROCESSING
                   LECTURE11
                   Fall 2010
                   2K8-5th Semester
                   Tahir MuhammadTahir Muhammad
                   tmuhammad_07@yahoo.com
               Content and Figures are from Discrete-Time Signal Processing, 2e by Oppenheim, 
                                  Shafer, and Buck, ©1999-2000 Prentice Hall Inc.
           FILTER DESIGN TECHNIQUES
           | FilFilter:
               y Any discrete-time system that modifies certain frequencies
           | Freqequeencycy-seselecective ve efilters pass os pass only cey certaain  freqequeenccy y 
              components and totally reject all others
           | Filter Design Steps:
               y SiSpecifificatition
                   | Problem or application specific
               y Approximation of specification with a discrete-time system
                   | O fOur focus  is  to  go f from  spec  to  discrete-time  system
               y Implementation
                   | Realization of discrete-time systems depends on target technology
           | Desired filter is generally implemented with digital 
              computation
               y It is used to filter a samppgled and digitized continuous-time siggnal
                                        Chapter 7: Filter Design Techniques                       1
               FILTER DESIGN TECHNIQUES
                     | W hWe have  allreaddy  sttudidided th the  use  of dif discrette-titime t systems  tto  
                         implement a continuous-time system
                           y If our specifications are given in continuous time we can use:
                                                                                                                               jjωω
                                                                                                                       HHH   e       =Hjjω//TT
                                                                            [ ]                                            ((     ))         ((          ))
                                                     [ ]                   y n
                                                   x n             jω                                                                      c
                   xc(t)               C/D                  H(e )                    D/C               yr(t)                        ωπ<
                           y It can be noted that the specifications for filters are typically 
                               given in frequency domain 
                                                              Chapter 7: Filter Design Techniques                                                        2
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...Digitalsignalprocessing lecture fall k th semester tahir muhammadtahir muhammad tmuhammad yahoo com content and figures are from discrete time signal processing e by oppenheim shafer buck prentice hall inc filter design techniques filfilter y any system that modifies certain frequencies freqequeencycy seselecective ve efilters pass os only cey certaain freqequeenccy components totally reject all others steps sispecifificatition problem or application specific approximation of specification with a o four focus is to go f spec implementation realization systems depends on target technology desired generally implemented digital computation it used samppgled digitized continuous siggnal chapter w hwe have allreaddy sttudidided the use dif discrette titime t tto implement if our specifications given in we can jj hhh hjj tt n x j c xc d h yr be noted for filters typically frequency domain...

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