Hello anyone can please explain me when filtering by FFT, what is the diference between filtering the normal spectrum and iFFT and...

Hello anyone can please explain me when filtering by FFT, what is the diference between filtering the normal spectrum and iFFT and filtering the power spectrum and then iFFT ? which one are best ? thanx

i need to build a GUI in matlab that shows an LMS adaptive filtering system used for noise cancellation can u tell me of good...

i need to build a GUI in matlab that shows an LMS adaptive filtering system used for noise cancellation can u tell me of good sites on this subject... anywhere i can find mfiles or GUIs that do adaptive filtering plz tell of good resources or help thnx

Hi tu you all! I have a problem of distortion while filtering. I have a signal with bandwith of 10 KHz centered on a carrier frequency of 30...

Hi tu you all! I have a problem of distortion while filtering. I have a signal with bandwith of 10 KHz centered on a carrier frequency of 30 KHz without noise. I'm trying filtering that with a butterworth filter of signal bandwith of 40 KHz centered on 30 KHz using [Bf1,Af1]=butter(5,[wn1 wn2]); y=filtfilt(Bf1,Af1,x); But if i try to compare x and y they are different even if the filte...

Hi, I'm recording motor cortex NIRS signals from the human brain where the heart rate(~1.5Hz), respiration(~2Hz) and Mayer wave(~0.1Hz) cloud a...

Hi, I'm recording motor cortex NIRS signals from the human brain where the heart rate(~1.5Hz), respiration(~2Hz) and Mayer wave(~0.1Hz) cloud a lot of the motor signal that is desired. The filtering technique has to be very phase neutral (like FIR not IIR filtering) unlike the filter.m where a dramatic affect occurs in phase shifting. Filtfilt.m is the usual one that is used that is effec...

Hello I am new to the group and in fact new to signal processing and filtering and was wondering if anyone could help me with a...

Hello I am new to the group and in fact new to signal processing and filtering and was wondering if anyone could help me with a problem I have filtering in MATLAB. Firstly I should say that I have a large number of waveforms (>5000) and from each wish to extrac

Hello I am new to the group and in fact new to signal processing and filtering and was wondering if anyone could help me with a...

Hello I am new to the group and in fact new to signal processing and filtering and was wondering if anyone could help me with a problem I have filtering in MATLAB. Firstly I should say that I have a large number of waveforms (>5000) and from each wish to extrac

dear krishnamachary, filtering in the "frequency domain" does not mean convolution in this domain. filtering means u are ...

dear krishnamachary, filtering in the "frequency domain" does not mean convolution in this domain. filtering means u are taking a product of the Fourier transforms of the signal x(n) and the system impulse response h(n). the fourier transforms are X(n) and H(n)

dear krishnamachary, filtering in the "frequency domain" does not mean convolution in this domain. filtering means u are ...

dear krishnamachary, filtering in the "frequency domain" does not mean convolution in this domain. filtering means u are taking a product of the Fourier transforms of the signal x(n) and the system impulse response h(n). the fourier transforms are X(n) and H(n)

dear krishnamachary, filtering in the "frequency domain" does not mean convolution in this domain. filtering means u are ...

dear krishnamachary, filtering in the "frequency domain" does not mean convolution in this domain. filtering means u are taking a product of the Fourier transforms of the signal x(n) and the system impulse response h(n). the fourier transforms are X(n) and H(n)

Dear all, I am working on the 2-D fir filtering, i need to calculate the passband ripple and stopband attenuation for the...

Dear all, I am working on the 2-D fir filtering, i need to calculate the passband ripple and stopband attenuation for the 2-D fir filtering case using matlab, for 1 - D i can use max(H) which will give me the passband ripple and i can calculate the s

please check the following programs, the 1st is used to call on a .wav file, change it into a matrix, fft it, filter it, and then rewrite it, but...

please check the following programs, the 1st is used to call on a .wav file, change it into a matrix, fft it, filter it, and then rewrite it, but the problem is the new file is just a file, there is no sound?? the 2nd is the same but without filtering and the same problem arises, I will really appreciate any help !! :) thanks

thx form moderator i'm a new member in this group & beginner in matlab may i question about problem in spatial filtering in image...

thx form moderator i'm a new member in this group & beginner in matlab may i question about problem in spatial filtering in image processing how we count convolution method using robert cross gradient operator example : robert operator -1 0 ?0 1 image : A B C D E F G H I J K L M N O P new image in : A11 = A...

Hi everbody.I have a doubt.I am doing a problem of filtering(fir) in which we have to acquire our carrier precisely ..For that we have to do the...

Hi everbody.I have a doubt.I am doing a problem of filtering(fir) in which we have to acquire our carrier precisely ..For that we have to do the decimation, filtering(LPF) and down conversions(it is areal time application).TO check the frequency I have to do fft at each stage ..NOw the doubt comes is every time I do fft at each stage, the amlitude of fft peak decreases and it becomes very low at ...

hello, I need to compress a chirp signal using convolution i.e. by Matched filtering in Matlab. *Can anybody write the steps how to do this...

hello, I need to compress a chirp signal using convolution i.e. by Matched filtering in Matlab. *Can anybody write the steps how to do this in Matlab?? *How can I define an Impulse function and of what kind should it be? What should I do with this impulse function? Thanks.

Hi, I need to know 2 things: 1) the matlab command (if there is any) for 'Matched filtering'. 2) mathematical expression of 'linear Chirp...

Hi, I need to know 2 things: 1) the matlab command (if there is any) for 'Matched filtering'. 2) mathematical expression of 'linear Chirp signal' for Radar systems. I need to compress a linear chirp signal by match filter and display a compressed pulse. Hope I would be assisted. Thanks.

Hello! I've got a basic? question regarding filtering. The goal with the filtering is to match four frequency response source curves...

Hello! I've got a basic? question regarding filtering. The goal with the filtering is to match four frequency response source curves against two target curves. Let us call the target curves goal1 and goal2 and the source curves source1, source2, source3 and source4. What I would like to do (I think!) is to solve the equation system below. That is, for a specific frequency 0 < f < fs

hello, im new to the topic of adaptive filters and its implementation in matlab. im doing a project on 'filtering and analysis of an ECG...

hello, im new to the topic of adaptive filters and its implementation in matlab. im doing a project on 'filtering and analysis of an ECG wave'. we are carrying out all our analysis on an ECG wave with only a powerline interference (60hz). the signal available to us is an ECG wave with a noise component of 60hz, sampled at 200hz..the file is in .dat format. we have been able to impl...

i have the source code for adaptive median filtering.but when i run this code,it has an error..i'm new to matlab ..below are some of the ...

i have the source code for adaptive median filtering.but when i run this code,it has an error..i'm new to matlab ..below are some of the code ip_edge = zeros (212,276); ip_convert = double (ip); the error is below.. ip_edge (11:202, 11:266) = ip_edge (11:202, 11:266) + ip_convert; can anybody tell me

hi all, i need to know about adaptive filtering with matlab implementation for noise cancellation. can anybody help me out?? ...

hi all, i need to know about adaptive filtering with matlab implementation for noise cancellation. can anybody help me out?? thanks fatima

Hi, I am dealing with 3d data. I am supposed to do a 3d fft followed with a 3d butterworth filter. can somebody tell me how to do it ?...

Hi, I am dealing with 3d data. I am supposed to do a 3d fft followed with a 3d butterworth filter. can somebody tell me how to do it ? ( specificaly multidimensional filtering ? ) -Ankur