I need to design a butterworth approximated low pass, high pass, band pass, band stop filter characteristics.This i did using DFT technique which is a very heavy algorithm.So My question is how to design the FIR for my requirement.So can anybody help in how to proceed... Thank you :-) With Regards, SRS
Reg:Design of Butterworth approximated filter using FIR filter design technique
Started by ●September 5, 2009
Reply by ●September 5, 20092009-09-05
On Sep 5, 9:56 am, SRS <sitaram...@gmail.com> wrote:> I need to design a butterworth approximated low pass, high pass, band > pass, band stop filter characteristics.This i did using DFT technique > which is a very heavy algorithm.So My question is how to design the > FIR for my requirement.So can anybody help in how to proceed... > Thank you :-) > > With Regards, > SRSA recent article: Butterworth Window for Power Spectral Density Estimation Tae Hyun Yoon, and Eon Kyeong Joo, ETRI Journal, vol.31, no.3, June 2009, pp. 292-297. available from: http://etrij.etri.re.kr/Cyber/servlet/BrowseAbstract?vol=31&num=3&pg=292 gives an approximate Butterworth window approach that can be applied to FIR filters through the window based FIR design approach. Dale B. Dalrymple
Reply by ●September 5, 20092009-09-05
On 9/5/2009 9:56 AM, SRS wrote:> I need to design a butterworth approximated low pass, high pass, band > pass, band stop filter characteristics.This i did using DFT technique > which is a very heavy algorithm.So My question is how to design the > FIR for my requirement.So can anybody help in how to proceed... > Thank you :-) > > With Regards, > SRSIf you have access to a Parks-McClellan (or Remez exchange) routine with a 'Hilbert' or 'quadrature' switch, you can use this method for the Butterworth low pass: http://www.dspguru.com/comp.dsp/tricks/dsn/nlp_fir.htm -- Eric Jacobsen Minister of Algorithms Abineau Communications http://www.abineau.com
Reply by ●September 6, 20092009-09-06
On 5 Sep, 18:56, SRS <sitaram...@gmail.com> wrote:> I need to design a butterworth approximated low pass, high pass, band > pass, band stop filter characteristics.This i did using DFT technique > which is a very heavy algorithm.So My question is how =A0to design =A0the > FIR =A0for my requirement.Why? What's wrong with the usual IIR design methods? Rune
Reply by ●September 6, 20092009-09-06
On Sat, 5 Sep 2009 10:32:21 -0700 (PDT), Dale Dalrymple <dbd@ieee.org> wrote:>On Sep 5, 9:56 am, SRS <sitaram...@gmail.com> wrote: >> I need to design a butterworth approximated low pass, high pass, band >> pass, band stop filter characteristics.This i did using DFT technique >> which is a very heavy algorithm.So My question is how to design the >> FIR for my requirement.So can anybody help in how to proceed... >> Thank you :-) >> >> With Regards, >> SRS > >A recent article: > >Butterworth Window for Power Spectral Density Estimation Tae Hyun >Yoon, and Eon Kyeong Joo, ETRI Journal, vol.31, no.3, June 2009, pp. >292-297. > >available from: > >http://etrij.etri.re.kr/Cyber/servlet/BrowseAbstract?vol=31&num=3&pg=292 > >gives an approximate Butterworth window approach that can be applied >to FIR filters through the window based FIR design approach. > >Dale B. DalrympleHi Dale, That's an interesting article. Thanks for pointing it out to us. [-Rick-]
