FIR/ high pass

Started by rezk sonia in Matlab DSP9 years ago

Hi,   I want to implement an FIR High pass filter by using FIR1 function . The parameters of the filter are as follows filter...

Hi,   I want to implement an FIR High pass filter by using FIR1 function . The parameters of the filter are as follows filter order normalised stopband frequency normalised passeband frequency I have some difficulty to enter these parameters in the suited place in the function.  thanks for any suggestion ------------------------------------------------------- Sonia Rezk PhD Student, ...


Bandpass Filter

Started by Ahmed Shahein in Matlab DSP12 years ago 1 reply

Hello Everybody, I want to design a bandpass filter using Matlab. Roughly I know how to use remez but in my case I have the following...

Hello Everybody, I want to design a bandpass filter using Matlab. Roughly I know how to use remez but in my case I have the following data: Center Frequency = 44.1e3; Band Width = 1837.5e3; Which means that I know the center frequency and both the cutoff frequencies but I don't have the passband frequencies. So how can I design the filter in matlab since the command needs 4 frequencie...


Decimation FIR filter design

Started by QQ in Matlab DSP10 years ago 3 replies

Hi, does anyone know how to design a decimation filter in MATLAB. I do not want CIC filter, but would like to have FIR filter. Thank you very...

Hi, does anyone know how to design a decimation filter in MATLAB. I do not want CIC filter, but would like to have FIR filter. Thank you very much!


low pass filter with windowing method

Started by logz...@yahoo.com in Matlab DSP12 years ago

hi everyone, im a student doing an assignment about development of an adaptive notch filter for the removal of 50hz noise from an ecg...

hi everyone, im a student doing an assignment about development of an adaptive notch filter for the removal of 50hz noise from an ecg signal..after i read about filters i chose low pass filter with woindowing method(kaiser)..now i tried this command.. > > fsamp = 60; fcuts = [5 10]; mags = [1 0]; devs = [0.05 0.01]; [n,Wn,beta,ftype] = kaiserord(fcuts,mags,devs,fsamp); hh = fir what i s


how to design LPF given i/p signal its sampling freq, reqiured o/p, in MATLAB

Started by "T.E Ravi" in Matlab DSP11 years ago 3 replies

Hai everyone, I have an i/p signal x = 1 +0.5* sin(pi*t) where t = [0:0.01:5], basically a signal sampled at 100 Hz. I need to filter out the...

Hai everyone, I have an i/p signal x = 1 +0.5* sin(pi*t) where t = [0:0.01:5], basically a signal sampled at 100 Hz. I need to filter out the d.c. component i.e. get 1 as a constant output so for which I have to design a low pass filter.   can any one tel me how to design low pass filter in MATLAB   Thank you


How to Design a Comb Filter in Matlab

Started by Anonymous in Matlab DSP19 years ago 1 reply

hi to all, this is really intersting one!!!!!! If One Input with some Useful Information and Noise and both information and ...

hi to all, this is really intersting one!!!!!! If One Input with some Useful Information and Noise and both information and noise are sinusoidal and i want to remove that noise using Comb Filter then How can I design a perfect comb filter in Matlab. I have freq of


Lowpass filter design

Started by Mahera in Matlab DSP10 years ago

Dear all, can anybody give me a simple MATLAB code for designing a lowpass FIR filter and show impulse responses? Please help.

Dear all, can anybody give me a simple MATLAB code for designing a lowpass FIR filter and show impulse responses? Please help.


Kalman Filter Through Factor Graphs in Matlab

Started by mana...@gmail.com in Matlab DSP13 years ago

hi friends.. I am trying to implement a discrete Kalman Equalizer in Matlab using Factor graphs.If anyone has any good sites or links for this...

hi friends.. I am trying to implement a discrete Kalman Equalizer in Matlab using Factor graphs.If anyone has any good sites or links for this purpose ,it will b really helpful.Also does factor graph implementation of kalman filter results in lower complexity??What are the advantages of implementing Kalman Filter through factor graphs??


Filtering EEG signals

Started by Anonymous in Matlab DSP19 years ago

Does any out there know how to accuratley filter frequencies in 0.2 Hz bins....exactly? Which filter, order number, etc. would...

Does any out there know how to accuratley filter frequencies in 0.2 Hz bins....exactly? Which filter, order number, etc. would be most useful. Thanks Magnut


IIR filter design

Started by karjee_s in Matlab DSP17 years ago 2 replies

hi, I am designing an IIR filter for my application ... the problem is i am confused with the transfer function... some books...

hi, I am designing an IIR filter for my application ... the problem is i am confused with the transfer function... some books say it is: y[n]=a0*x[n]+a1*x[n-1]......+b1*y[n-1]+b2*y[n-2].... some other books says, y[n]=a0*x[n]+a1*x[n-1]......-b1*y[n-1]-b2*y[n


Kalman filter and how to use in Matlab

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

Hello everybody, I would like to use the Kalman filter (and the unscented kf, the particle kf, etc) in prediction for time series, but I...

Hello everybody, I would like to use the Kalman filter (and the unscented kf, the particle kf, etc) in prediction for time series, but I haven't any experiences with the KF. I wonder if someone would be so kind to help me in using the KF,and what toolbox could be better. Thanks in advance. Alberto Rossetti


Getting FIR filter coefficients from transfer function

Started by Anas Imtiaz in Matlab DSP9 years ago 3 replies

Hi all, I'm trying to implement a low pass filter on a microcontroller, getting coefficients in MATLAB. I have the transfer function in...

Hi all, I'm trying to implement a low pass filter on a microcontroller, getting coefficients in MATLAB. I have the transfer function in s-domain, so I am using bilinear() to get the coefficients. This gives num and den (a and b coefficients) for an IIR implementation. I would like to know if it possible to get the coefficients for an FIR implementation of a filter, when you have the transf...


Gaussian Filter in signal processing

Started by Bavithi in Matlab DSP14 years ago

Hello, I would like to investigate the effects of filters on a signal. I have tried different nyquist filters like Sinc and RRC. I would...

Hello, I would like to investigate the effects of filters on a signal. I have tried different nyquist filters like Sinc and RRC. I would like to work with non-nyquist filter such as guassian. However, I am not sure of the choice of 'sigma' for the filter. The signal is a complex gaussian signal and has a certain variance, say v1. I normalize this variance, so that the variance of real...


Kalman filter

Started by stanciu_mihai_ionut in Matlab DSP13 years ago 1 reply

Hello all, I want to use a kalman filter and i don't know exactly how to do that. I'd appreciate if someone could give me an idea or a...

Hello all, I want to use a kalman filter and i don't know exactly how to do that. I'd appreciate if someone could give me an idea or a simple example of kalman filetring for an one-dimensional signal (state space). Thak you! Best regards!


QMF Banks

Started by Appalayagari Sreedhar in Matlab DSP17 years ago

Respected All, I am Sreedhar, I am Reading Multirate DSP, In that I am interested in QMF Design, I read it as Perfet...

Respected All, I am Sreedhar, I am Reading Multirate DSP, In that I am interested in QMF Design, I read it as Perfet reconstruction filter, why is it so?. Are there any advantages using this Quadrature Mirror Filter bank. One More question? The Frequency response


DSP for Beginners

Started by jbal...@ufl.edu in Matlab DSP11 years ago 2 replies

Hello, I'm currently analyzing wind speed records, and it turns out that type of filter used influences the power spectrum. Does any one...

Hello, I'm currently analyzing wind speed records, and it turns out that type of filter used influences the power spectrum. Does any one know of a good first reference/book for Digital Signal Processing? I'm also looking for the filter functions for block averages as I also need to understand this for my research. Regards, Juan Antonio


Filter Design

Started by Appalayagari Sreedhar in Matlab DSP18 years ago 1 reply

Hi, I am presently working on Filter design, i need to introduce the finite wordlength effects. does anyone worked on this ...

Hi, I am presently working on Filter design, i need to introduce the finite wordlength effects. does anyone worked on this please suggest me some tips. how to implement it. thanx in advance, sree.


kaiser problem !

Started by kianogo in Matlab DSP16 years ago

Hi I am trying to design a kaiser filter. Just for testing I set wp=0.3 and ws=0.4 to get the lowpass version of the filter. ...

Hi I am trying to design a kaiser filter. Just for testing I set wp=0.3 and ws=0.4 to get the lowpass version of the filter. It seems changing the wp and ws does not swich between low- or highpass or the leads to exact changes of the stopband and passband regions a


Filters and how to calculate Delay

Started by adap...@yahoo.co.jp in Matlab DSP11 years ago 1 reply

Greetings everyone in the group. This is my first message. I am not a DSP engineer but a programmer with a very limited knowledge of filters. I...

Greetings everyone in the group. This is my first message. I am not a DSP engineer but a programmer with a very limited knowledge of filters. I am writing in the hope that someone can help me with his/her expertise in the following problem: I have a butterworth filter implemented in software.(C++) So far it works exactly the same as the functions: butter() and filter() in Matlab. Therefore wh...


comb filter?

Started by Anand Lakshmanan in Matlab DSP18 years ago 1 reply

Does anyone know how to design a comb filter using Matlab ...say for instance I need to allow freqz of 50 , 100 , 150 Hz only. ...

Does anyone know how to design a comb filter using Matlab ...say for instance I need to allow freqz of 50 , 100 , 150 Hz only. -thanks, -Anand.