[Fwd: Re: Nonlinear fir filter design]

Started by Jeff Brower in Matlab DSP18 years ago

Appalayagari Sreedhar- Yes I agree that for audio applications you would want to stay with linear phase FIR filters, when...

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'v


workspace coefficients in Simulink

Started by Nalin Pithwa in Matlab DSP17 years ago 1 reply

Hello, I am using MATLAB and Simulink based DSP/Communications Blockset in my application. I need a small help. In the design...

Hello, I am using MATLAB and Simulink based DSP/Communications Blockset in my application. I need a small help. In the design of my system, one of the blocks is a FIR filter. The filter coefficients are generated during run-time and they change adaptively. How can


comb filter

Started by egan_nc in Matlab DSP17 years ago

Hi everyone, I am trying to design a 3rd order with decimation ratio of 8 comb filter using matlab's cicdecimate function. The...

Hi everyone, I am trying to design a 3rd order with decimation ratio of 8 comb filter using matlab's cicdecimate function. The input signal is the 1 bit output of a delta sigma modulator. According to the example on matlab, I should set up the file as follow. M = 1; % Different


IIR filter design

Started by megha daga in Matlab DSP14 years ago 1 reply

Hi everyone I am new to matlab and I am working on designing of a cascaded IIR filter (biquads with 5 coeff each) design. My sampling rate is...

Hi everyone I am new to matlab and I am working on designing of a cascaded IIR filter (biquads with 5 coeff each) design. My sampling rate is 48KHz, cut off is 6KHz. I am currently using fdatool. But I am not sure about its stability. I also tried using the commands butter and then tf2sos. Some one kindly suggest how stable these filters can be? Which is a better method. Kindly provide your sug...


Doubt

Started by getk_geethu in Matlab DSP10 years ago

I'm working on the implementation of Kalman filter for channel estimation of OFDMA systems using Matlab. But not able to succeed fully in the...

I'm working on the implementation of Kalman filter for channel estimation of OFDMA systems using Matlab. But not able to succeed fully in the same. Can we use Kalman filter when we use an inbuilt rayleigh channel in Matlab?? Thanks in advance..


triangular moving average filter

Started by emkatsogridakis in Matlab DSP11 years ago

Hi everyone! I need a little bit of help. I have a signal that i need to "smooth" in matlab, using a triangular moving average filter. I...

Hi everyone! I need a little bit of help. I have a signal that i need to "smooth" in matlab, using a triangular moving average filter. I searched the internet, and the best i found was the tsmovavg, which unfortunately doesn't work in my case. Any suggestions on how to do it, or which command i could use? Thanx in advance for all the help


Filtering PWM in MATLAB

Started by k2lr...@arrl.net in Matlab DSP11 years ago

Hello all. I am relativele new to using MATLAB for DSP related work, and I am looking for some direction/help. I am attempting to model a PWM...

Hello all. I am relativele new to using MATLAB for DSP related work, and I am looking for some direction/help. I am attempting to model a PWM signal, and how the output would look after passing through a filter. I can creat the PWM signal with out a problem. My problem comes when I see the effect a low pass filter would have(just an example). What I am currently doing is I find the FFT, and t...


Question about design a butterworth filter

Started by mmme8656 in Matlab DSP14 years ago

Hi, everyone, I just started to use matlab this semester. And my professor asked us to design a low pass filter using 'butter()' with - 65dB/Hz...

Hi, everyone, I just started to use matlab this semester. And my professor asked us to design a low pass filter using 'butter()' with - 65dB/Hz slope of roll-off. Can someone tell me how to use 'butter()' to specify the slope? Thanks.


2-D filter matrix

Started by Appalayagari Sreedhar in Matlab DSP17 years ago 1 reply

Dear all, I am trying to design the 2-D fir filter. i am using the meshgrid command and calculating the frequencies. it returns...

Dear all, I am trying to design the 2-D fir filter. i am using the meshgrid command and calculating the frequencies. it returns with the values of certain dimension, for eg, meshgrid(9) it returns the 9x9 matrix value. can anyone explain why we need


Gabor filter in Matlab

Started by jidnya shah in Matlab DSP17 years ago

Hello, Has anybody implemented an even symmetric Gabor filter on fingerprints in Matlab? Any help will be highly appreciated. ...

Hello, Has anybody implemented an even symmetric Gabor filter on fingerprints in Matlab? Any help will be highly appreciated. Awaiting a sooner reply, Thanks, Jidnya


CIC Compensator: Implementation with farrow structure

Started by alis...@gmail.com in Matlab DSP11 years ago

Dear all, I am using filter design toolbox to generate filter design object for CIC compensator with following parameters: MultirateType:...

Dear all, I am using filter design toolbox to generate filter design object for CIC compensator with following parameters: MultirateType: 'Rational Sample Rate Converter' Response: 'CIC Compensator' InterpolationFactor: 2031 DecimationFactor: 1250 Specification: 'Fp,Fst,Ap,Ast' ...


Help on vectorization. IIR filter

Started by all4...@yahoo.com in Matlab DSP10 years ago

Hello everybody, I'm trying to vectorize my code to avoid using for-loop operator. [code] for k=2:N x(:,k) = x(:,k-1) + gain(:,k) .*...

Hello everybody, I'm trying to vectorize my code to avoid using for-loop operator. [code] for k=2:N x(:,k) = x(:,k-1) + gain(:,k) .* (y(:,k) - x(:,k-1)); end; [/code] as far as i understand - this kind of recurrent relation is very common in DSP and corresponds to one-pole IIR filter. If 'gain' is a constant scalar value then I can rewrite it using standard built-in matlab functio...


Adaptive IIR - LMS

Started by biobaguear in Matlab DSP13 years ago

Hello, My name is Federico Baguear, Im from Buenos Aires and I study Biomedical Engineer. Im working in a real time system identification,...

Hello, My name is Federico Baguear, Im from Buenos Aires and I study Biomedical Engineer. Im working in a real time system identification, using a IIR LMS adaptive filter. I couldn`t find much references about how to estimate the μ coefficients for a particular signal. I try with a paper written by Wu, "Fast converging adaptive IIR LMS filter in direct form using the suboptimal ste


Paynter Filter Pole Locations

Started by larkjon in Matlab DSP15 years ago

I'm interested in equations for the pole locations of the Paynter filter. The publication "The Lightning Empericist" has the...

I'm interested in equations for the pole locations of the Paynter filter. The publication "The Lightning Empericist" has the equations for the even order Paynter filter pole locations, and for the third order pole locations, but no equations for higher odd order


extended kalman filter

Started by abiglis in Matlab DSP18 years ago 1 reply

Hi Does anyone has or knows where can i find some matlab code for the extended kalman filter;; Thanks ...

Hi Does anyone has or knows where can i find some matlab code for the extended kalman filter;; Thanks


Calculating Attenuation factor for Butterworth filter

Started by kaanthsap in Matlab DSP13 years ago

Hi, I was wondering if any one can help me or point to any references which can help me calculate the attenuation factor of a third...

Hi, I was wondering if any one can help me or point to any references which can help me calculate the attenuation factor of a third order Butterworth Bandpass filter. Thanks Kaanth.


How to use simulink to create a filter design?

Started by Ah_Nee in Matlab DSP15 years ago

Hi all. I am new here and i am just a undergraduate student. I am now having my final year project which is "Wireless Speech ...

Hi all. I am new here and i am just a undergraduate student. I am now having my final year project which is "Wireless Speech Recogntion Entry System" Now i wish to design a filter that will get data straight from microphone in real-time, and then wil


MATLAB Adaptive algo doubts

Started by gmukund_2000 in Matlab DSP18 years ago

Hi, I was going thru a code for implementing the NLMS algorithm. I had a few doubts about it. Why has the MATLAB 4 generator been...

Hi, I was going thru a code for implementing the NLMS algorithm. I had a few doubts about it. Why has the MATLAB 4 generator been called in the first 2 lines. Why is the order of the adaptive filter 32? Is it necessary to initially give a zero value to the weights of the filter


Gaussian filter

Started by enriquefergosa in Matlab DSP17 years ago

Hallo. I am trying to do a gaussian filter using the matlab function H = FSPECIAL('gaussian',HSIZE,SIGMA). I need to do that the ...

Hallo. I am trying to do a gaussian filter using the matlab function H = FSPECIAL('gaussian',HSIZE,SIGMA). I need to do that the height of the gaussian is one (that is that the gaussian goes from zero to one)while the parameter SIGMA is varied to change the wide of the base. How cou


How to decide the Band Pass filter Frequency range

Started by "Ahmad, Nihal IN BLR SISL" in Matlab DSP13 years ago

Hi all, I have one time domain signal, on which I have to apply the band pass filter. How can I decide the Band Pass Frequency range? I am...

Hi all, I have one time domain signal, on which I have to apply the band pass filter. How can I decide the Band Pass Frequency range? I am calculating the power of signal and plotting it on MATLAB i.e. frequency response. I am searching the frequency points, where the power has it's maximum value. Is it the right way to search band pass filter frequency range? The [ h, f ] = freqz(); functio...