Choosing ripples

Started by Anonymous in Matlab DSP22 years ago 4 replies

Hi firiends Please excuse me if I have posted this query on irrelevant discussion group. I have a basic question on Lowpass...

Hi firiends Please excuse me if I have posted this query on irrelevant discussion group. I have a basic question on Lowpass Filter Design. I am talking in the context of Upsampling and Down sampling. What is the criteria to choose the ripples in passband and stop band?


Help in PNLMS algorithm!!!!

Started by sharmin sultana in Matlab DSP13 years ago

Hi , I am working on adaptive filter algorithm. I have already implemented the NLMS algorithm but when I wrote the code for PNLMS algorithm I am...

Hi , I am working on adaptive filter algorithm. I have already implemented the NLMS algorithm but when I wrote the code for PNLMS algorithm I am not getting the desired output. If anyone already worked with PNLMS algorithm plz help. ?


iso 2631

Started by rn_moorthy in Matlab DSP16 years ago

Hi, I need matlab code based on ISO 2631 for vibration analysis. The code may consists of design of one third octave filter design for a...

Hi, I need matlab code based on ISO 2631 for vibration analysis. The code may consists of design of one third octave filter design for a frequency range of 0.8 to 10 Hz. Can anybody tell me the solution? rn_moorthy


Precision in Matlab

Started by Girish B S in Matlab DSP19 years ago 2 replies

Hi All, Please let me know if it is possible to control precision in Matlab. I learnt that, by default, Matlab uses double...

Hi All, Please let me know if it is possible to control precision in Matlab. I learnt that, by default, Matlab uses double precision for all arithmetic operations. My application requires me to restrict digital filter data (input) to only about 10 bits. Thanks,


Long Term Predictor - Speech

Started by panayiotis_pantelides in Matlab DSP16 years ago

Hi all, i'd like to perform a Long term Pretictor analysis for a .wav speech segment inorder to optain the pitch filter. Any ideas for doing...

Hi all, i'd like to perform a Long term Pretictor analysis for a .wav speech segment inorder to optain the pitch filter. Any ideas for doing it ? I have already implemented LPC analysis if this helps ... Thanks in advance


Non stationary Transient Data

Started by PANG...@ntu.edu.sg in Matlab DSP12 years ago 1 reply

Hi guys I have been trying to process my data with FFT to analyze the natural frequency of it. I try to use a high pass filter of 1 or 2 HZ...

Hi guys I have been trying to process my data with FFT to analyze the natural frequency of it. I try to use a high pass filter of 1 or 2 HZ because the source of the signal is a DC and i found that the result is still weird. It is a DC motor attach to a load and run it and will last for approximately 2 sec only. So i would like to ask the best DSP method to analyze this as if i just use FFT ...


Ripple and filter

Started by mb_for2003 in Matlab DSP19 years ago

Could anyone tell me how to choose ripple for passband and stopband in fliter design? Any definition please? To me it is not clear. ...

Could anyone tell me how to choose ripple for passband and stopband in fliter design? Any definition please? To me it is not clear. Great thanks. Mob. example: rp = 0.01; % Passband ripple rs = 0.1; % Stopband ripple


Multirate filter banks

Started by Molnar Levente in Matlab DSP20 years ago

Dear All, I'm doing my final year project in Digital Signal Processing using Matlab. I would like to ask for few suggestions or...

Dear All, I'm doing my final year project in Digital Signal Processing using Matlab. I would like to ask for few suggestions or inputs from you. A very brief description of my FYP project: I have to split an input signal (formed from N samples) in M frequency bands (for


ARMA filter

Started by liu_nyc in Matlab DSP19 years ago

I'm using the garchfit function in the GARCH tool box to estimate an ARMA(1,1) model. It doesn't work so well. The constrained ...

I'm using the garchfit function in the GARCH tool box to estimate an ARMA(1,1) model. It doesn't work so well. The constrained optimization routine called by garchfit() seems to violate the constraints( that the coeff's are less than one in absolute value ), and as a result, the para


[Fwd: Re: Smoothing Filter]

Started by Jeff Brower in Matlab DSP20 years ago

Craig- That was wrong; too early. Corrected version below; sorry. -Jeff sum = 0; for i=1:L % add new...

Craig- That was wrong; too early. Corrected version below; sorry. -Jeff sum = 0; for i=1:L % add new sample, subtract oldest one sum = sum + X(i) - X(i-M-1); % this one "looks ahead" % sum = sum


inverse of non minimum-phase system

Started by mojo...@gmail.com in Matlab DSP15 years ago

if I have a non min phase system H(z) = B(z)/A(z) and i split the numerator into zeros inside and outside the unit circle B = B1 +B2 and then I...

if I have a non min phase system H(z) = B(z)/A(z) and i split the numerator into zeros inside and outside the unit circle B = B1 +B2 and then I make H(z) = B1(z)B2(z^-1)/A(z) * B2(z)/B2(z^-1) where one part is my equalizer and another is my all-pass filter how exactly do I find B2(z^-1) using matlab? i already know B1, B2, but I don't know how to find the inverse. i have to use this meth...


problem fminunc

Started by nisticos2000 in Matlab DSP20 years ago

does anyone know how to overcome this problem (that would really help me out): I'm using the function fminunc to minimize a...

does anyone know how to overcome this problem (that would really help me out): I'm using the function fminunc to minimize a loglikelihood function computed through kalman filter udpating, but it keeps sending me the warning message: Matrix is close to singular or badly scaled.


fft2 filtered image recover

Started by p3dr0s4 in Matlab DSP18 years ago 1 reply

Hi I need your help, can anyone tell me how I could recover the original image from a filtered one knowing the filter impulse...

Hi I need your help, can anyone tell me how I could recover the original image from a filtered one knowing the filter impulse response and using the fft2 matlab function. regards Pedro Pedrosa


SNR

Started by egan_nc in Matlab DSP19 years ago 1 reply

Hello, Please can someone help me with this question? I generate a 6kz sin wave and design an ideal filter using remezord and...

Hello, Please can someone help me with this question? I generate a 6kz sin wave and design an ideal filter using remezord and remez with cutoff frequency of 6.5k and 8khz. The filtered output in time domain matched the original signal. So is the fft output. My question is how d


how to separate frequency components

Started by Prathibha Dhanush in Matlab DSP18 years ago

Hai all, I have to separate the frequency compnents below 200 Hz and above 13000 Hz.If I use a filter I am not getting a sharp...

Hai all, I have to separate the frequency compnents below 200 Hz and above 13000 Hz.If I use a filter I am not getting a sharp cutoff.Is it good to separate frequency bands and to remove the unwanted frequencies.Can anyone suggest me in detail with code Thank u


Re: Simulink/C6713 project

Started by osca...@hotmail.com in Matlab DSP15 years ago

i WONDER WHAT VERSION OF MATLAB U ARE USING BECAUSE THE R2006 INCLUDES SOME DEMOS FOR THE DSK6713 THAT YOU CAN RUN, THE DEMOS ARE FROM EMBEDDED...

i WONDER WHAT VERSION OF MATLAB U ARE USING BECAUSE THE R2006 INCLUDES SOME DEMOS FOR THE DSK6713 THAT YOU CAN RUN, THE DEMOS ARE FROM EMBEDDED TARGET C6000 i tested the reverbeation demo and works fine the others i have some problems running, i woul like to see you filter application if you can share it. Hello group, > > I want to try connecting the C6713 board to SIMULINK. I have all th


Dynamic filtering

Started by SUNIL FRANCIS MENEZES in Matlab DSP21 years ago

** Proprietary ** Hi, I would like to know if anyone has worked on dynamic filtering in digital domain in matlab. The...

** Proprietary ** Hi, I would like to know if anyone has worked on dynamic filtering in digital domain in matlab. The dynamic filter frequency response is varying continously at any given instance Thanks & eagerly waiting for response sunil


Low - pass filter explanation

Started by Mreza rahimi in Matlab DSP12 years ago

Hi Answer to question 1: fft of real signals is symmetric.this is one of basics of DSP. For designing and implementation of digital...

Hi Answer to question 1: fft of real signals is symmetric.this is one of basics of DSP. For designing and implementation of digital filters,you can use fdatool in MATLAB.that's very ease to use. for further information abpout digital filters I suggest that study this book:"Laboratoary of Digital Signal Processing:Sanjit K Mitre" Regards


Transfer Functions

Started by freakdavidquebec in Matlab DSP19 years ago

I am trying to use the tf function to enter a filter response, but upon entering this in matlab 6.0 Release 12 num=[kd, kp,...

I am trying to use the tf function to enter a filter response, but upon entering this in matlab 6.0 Release 12 num=[kd, kp, ki]; den=[1 0]; sys=tf(num,den); it says: " ??? Undefined function or variable 'tf'. " Anybody knows the


How to covert MATLAB inbuilt function into C code ?

Started by Senbaga Ganesh in Matlab DSP13 years ago 1 reply

Hi Guys, Am in need of a solution to convert some inbuilt MATLAB functions into embedded C code. Even ordinary C code is enough....

Hi Guys, Am in need of a solution to convert some inbuilt MATLAB functions into embedded C code. Even ordinary C code is enough. The functions which i want are - filter - fir1 - conv Plz help.... Thanks in advance