Hi, Currently I am using a polyphase FIR filter to perform an interpolation. To gain performance I have in mind to redesign the original filter with the principle of a lookup table. Does anyone know where I can find some helpful information of how to implement this principle? Regards, Ellegaard
FIR filtering using a lookup table
Started by ●July 31, 2003
Reply by ●July 31, 20032003-07-31
Hi Ellegaard, Chances are that what you are looking for is the distributed arithmetic (DA) algorithm. Google for it and you should find a plethora of information. Ljubisa Bajic ATI Technologies -- My opinions do not represent those of my employer -- ellegaard@softhome.net wrote in message news:<a9673c3f.0307310020.253299a1@posting.google.com>...> Hi, > > Currently I am using a polyphase FIR filter to perform an > interpolation. To gain performance I have in mind to redesign the > original filter with the principle of a lookup table. Does anyone know > where I can find some helpful information of how to implement this > principle? > > Regards, > Ellegaard
Reply by ●July 31, 20032003-07-31
<ellegaard@softhome.net> wrote in message news:a9673c3f.0307310020.253299a1@posting.google.com...> Hi, > > Currently I am using a polyphase FIR filter to perform an > interpolation. To gain performance I have in mind to redesign the > original filter with the principle of a lookup table. Does anyone know > where I can find some helpful information of how to implement this > principle? >Ellegaard, You might Google on "lookup table filter FIR" to get things like this: http://www.chipcenter.com/dsp/DSP000301F1.html Fred
Reply by ●July 31, 20032003-07-31
Seems like there was a book about this (or including this) out in the early 80's by Bede and Lui (could be spelled wrong). Dirk Dirk A. Bell DSP Consultant (ISO work to do) <ellegaard@softhome.net> wrote in message news:a9673c3f.0307310020.253299a1@posting.google.com...> Hi, > > Currently I am using a polyphase FIR filter to perform an > interpolation. To gain performance I have in mind to redesign the > original filter with the principle of a lookup table. Does anyone know > where I can find some helpful information of how to implement this > principle? > > Regards, > Ellegaard
Reply by ●August 1, 20032003-08-01
Hello Dirk et. al., There is a book "Digital Signal Processing - Theory, Design, and Implementation" by Abraham Peled and Bede Liu, 1976, that has some info on decimation and interpolation with FIR filters. They present several worked out examples as well as give some theory. Even though the book is rather small, 304 pages, it presents some pretty neat ideas. Clay "Dirk Bell" <dirkman@erols.com> wrote in message news:bgcbur$7mt$1@bob.news.rcn.net...> Seems like there was a book about this (or including this) out in theearly> 80's by Bede and Lui (could be spelled wrong). > > Dirk > > Dirk A. Bell > DSP Consultant (ISO work to do) > > <ellegaard@softhome.net> wrote in message > news:a9673c3f.0307310020.253299a1@posting.google.com... > > Hi, > > > > Currently I am using a polyphase FIR filter to perform an > > interpolation. To gain performance I have in mind to redesign the > > original filter with the principle of a lookup table. Does anyone know > > where I can find some helpful information of how to implement this > > principle? > > > > Regards, > > Ellegaard > >
Reply by ●August 1, 20032003-08-01
That's the book. Dirk "Clay S. Turner" <physicsNOOOOSPPPPAMMMM@bellsouth.net> wrote in message news:g3wWa.10149$rJ4.3935@fe04.atl2.webusenet.com...> Hello Dirk et. al., > > There is a book "Digital Signal Processing - Theory, Design, and > Implementation" by Abraham Peled and Bede Liu, 1976, that has some info on > decimation and interpolation with FIR filters. They present several worked > out examples as well as give some theory. Even though the book is rather > small, 304 pages, it presents some pretty neat ideas. > > Clay > > > "Dirk Bell" <dirkman@erols.com> wrote in message > news:bgcbur$7mt$1@bob.news.rcn.net... > > Seems like there was a book about this (or including this) out in the > early > > 80's by Bede and Lui (could be spelled wrong). > > > > Dirk > > > > Dirk A. Bell > > DSP Consultant (ISO work to do) > > > > <ellegaard@softhome.net> wrote in message > > news:a9673c3f.0307310020.253299a1@posting.google.com... > > > Hi, > > > > > > Currently I am using a polyphase FIR filter to perform an > > > interpolation. To gain performance I have in mind to redesign the > > > original filter with the principle of a lookup table. Does anyone know > > > where I can find some helpful information of how to implement this > > > principle? > > > > > > Regards, > > > Ellegaard > > > > > > >