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# Low Pass Filter Code In Matlab

13 Threads found on edaboard.com: Low Pass Filter Code In Matlab

## problem in implementing coefficients in the design of low pass filter

Dear Sir, I am doing thesis in optimization of low pass filter using particle swarm optimization. Desigining and optimization is done in matlab. I have write the matlab code for the simple designing of low pass filter that is available in (...)

## Low Pass Filter to filter out harmonics from a signal. (MATLAB CODE)

I need a matlab code to promt the user to enter a sinusoid signal ex: x= 3*sin(2*pi*50*t) + 3*sin(2*pi*100*t) + 3*sin(2*pi*200*t) + 3*sin(2*pi*400*t) and if any other variables are needed from the user. then display the signal in time domain and frequency domain. and then apply a low pass filter, to (...)

## A low pass filter - matlab

Hey guys , help me to check this code.. i cant figure out how to make it run .. T.T Its just to filter out some high frequency in the song file i cut .. function filter_a() = wavread('cut2'); N = length(song); %length of song is 99093 k=; f1=k*fs/N; cf = 2000 ; n = ; t = n/cf; N = length(t); f = n*cf/N; hf = [o

## Frequency/Magnitude response of lowpass FIR filter

Hi, I have written a test program in matlab for lowpass fir, when i m plotting its magnitude response after fft, it seems to be a high pass filter. Why its doing so?? My code is as follow: N=50; %filter order Length=N+1; %length n0=N/2; %delay (...)

## Magnitude response of Lowpass FIR filter (Matlab2009a)

Hi, I have written a test program in matlab for lowpass fir, when i m plotting its magnitude response after fft, it seems to be a high pass filter. Why its doing so?? My code is as follow: N=50; %filter order Length=N+1; %length n0=N/2; %delay (...)

## Envelop detector circuit or code

We would need to see what you mean. Can you post an image of the spikes? A simple low pass filter may fix it, but it depends on the underlying signal. Also, the problem may be in your circuitry so the solution would be to fix the problem rather than try to filter the signal afterwards. A bit more detail would therefore (...)

## need to add low pass filter in matlab code

Dear All I have this matlab code which convert the time to frequency domain but b4 this i want to add a low pass filter. can some one help me pls. =wavread('filename.wav'); dt=1/fs;%% time interval t=(1:length(x))*dt; %%time vector X=fft(x); df=1/(length(x)*dt); %% frequency interval (...)

## Need matlab codes for noise removal in ecg using emd

Hi..... you know your design better.. so asking a code :?: i suggest some steps.. follow that.. its easy to use matlab... in command prompt type >> fdatool i.e filter design automation tool... just fill out your required bandpass or low pass (...)

## required matlab code for low pass filtering a signal

required matlab code for low pass filtering of a digital sequence for e.g i want how to found the value of this every elemnt in it after passing through low pass filter i requesting matlab code for it

## Matlab -- Image restoration

try using low pass filter or averaging ...

## how to write matlab code for RC 1st order low pass filter

hi, how to write matlab code for RC 1st order low pass filter?? i saw many matlab codes from internet , like butterworth, chebychev... but don't have the one for RC low pass filter?? pls advice how to do it? i was (...)

## Effects of increased sampling rate for FIR Filter in Matlab

I just designed an FIR filter in matlab, and saw the impulse response. I obtained a low pass filter. Up to now there were no problems. I read the cut-off frequency(0.144cycles/sample) and had 2 null frequencies at 0.325cycles/sample and 0.5cycles/sample. Then I inputted a discrete sine wave block(with (...)

## how to generate time_step in matlab code

Hi How to use matlab write a low_pass filter .. I can use simulink for simulation , but I want to know how to write a matlab code.. simulink file can novert to matlab code or not ?? a low pass (...)