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Discussion Groups | Matlab DSP | [Fwd: Re: Nonlinear fir filter design]
Technical discussion about Matlab and issues related to Digital Signal Processing.
[Fwd: Re: Nonlinear fir filter design] - Jeff Brower - Oct 26 18:03:00 2002
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Appalayagari Sreedhar- Yes I agree that for audio applications you would want to stay with linear phase FIR filters, when possible given real-time processing and memory constraints.. I'm not sure of a good reference for FIR filter design using genetic methods. I've posted your response to the group, so hopefully you will receive some suggestions. Jeff Brower DSP sw/hw engineer Signalogic -------- Original Message -------- Subject: Re: [matlab] Nonlinear fir filter design Date: Fri, 25 Oct 2002 19:28:08 +0100 (BST) From: Appalayagari Sreedhar <> To: Jeff Brower < Hi Jeff, Thanks for clearing the doubts regarding the non linear phase filter. In my problem i need to optimize the phase so that my filter can be used for linear phase required applications like audio etc. if u can please suggest me any references i will be greatful to u. i am working on the design of non linear FIR filter design using Genetic algorithm. i did the linear FIR filter now i started to work on this subject. thank u very much, regds,sree. Jeff Brower <> wrote: Appalayagari Sreedhar- Minimum phase FIR filters typically exhibit non-linear phase. You can convert from symmetric to minimum phase; so one design method is as follows: -design the standard FIR filter that meets your specs -convert to minimum phase -truncate trailing section of impulse response to some acceptable limit of tolerance for coefficients near zero The objective is to reduce processing time, in cases where non-linear phase is acceptable. Jeff Brower DSP sw/hw engineer Signalogic > I want to know clearly, what exactly the non linear phase fir filters. > > is the minimum phase fir filters are the nonlinear filters. > > i need to design a non linear filter,please shed some light on this area. > thank u all, > > and also does the antisymmetric impluse response gives us the nonlinear phase filter? > > regds,sree. |
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