Forums Search for: Filter
Re : Ripple and Filter
Hi Mob, When you look to design a filter, ideally you would want a brick wall type of filter. But then to design a filter with...
Hi Mob, When you look to design a filter, ideally you would want a brick wall type of filter. But then to design a filter with such a characteristic is physically not possible. So you try and design a filter whose curve would fit within the desired characteristics. That is you allow
how to transform from analog Bandpass filter ----->equivalent Lowpass filter
Transformation from analog Lowpass filter to Bandpass filter is obtained by following steps 1 - desing low pass filter having specifications of...
Transformation from analog Lowpass filter to Bandpass filter is obtained by following steps 1 - desing low pass filter having specifications of bandpass filter 2 - obtain transfer function of lowpass filter 3 - subsitute s' = [(s^2+wo^2)/s] into Lowpass Tansfer fn to obtain banspass Transfer fn. but how can we transform a BP filter to Lowpass filter in analog domain..... if anyone ha...
Re: RE: filter function in matlab for awgn
However in the problem specified the filter command is as good as filter you use. There is NO way to filter all the AWGN..if you can...
However in the problem specified the filter command is as good as filter you use. There is NO way to filter all the AWGN..if you can find a way to do that would be HUGE.. Mandar --- Glen Ragan <> wrote: > Yes, the filter() function will do filtering. Sinc
filter
hii all... i am trying to write C++ code for the filter function in matlab. (y=filter(b,a,x))..can any one tell me wat the filter...
hii all... i am trying to write C++ code for the filter function in matlab. (y=filter(b,a,x))..can any one tell me wat the filter function in matlab actually does...(the steps involved in filtering the data x using the filter coefficients a and b)..since its an inbuilt function
NEED TO DESIGN A LOW P ASS FILTER
inI need to design a low pass filter with cut-off frequency 150Hz.since my algorithm involves finding the difference between the energy of...
I need to design a low pass filter with cut-off frequency 150Hz.since my algorithm involves finding the difference between the energy of the signal before and after passing through the filter ,I need the filter to have very high efficiency. I found ellip - 4th order to have good performance.But i need a better one. Could anyone suggest me a better filter type. waiting for reply T...
filter applicaion
ini am trying to apply a filter to a image matrix x ,, x=imread('image.bmp);please can u tell me how to apply digital filer to the matrix x, ...
i am trying to apply a filter to a image matrix x ,, x=imread('image.bmp);please can u tell me how to apply digital filer to the matrix x, i can design filter using fdatool; but where does the desined filter is saved i do not know,, and how to use any filter on any input sequence i do not know. please help me in this thing
Fillter design
Hi guys Can anyone help me in design filter using Matlab with following specification Design an approximation to ideal Low pass...
Hi guys Can anyone help me in design filter using Matlab with following specification Design an approximation to ideal Low pass filter of bandwith = 100 Hz The input to the filter has energy in the range 0 250 HZ The filter is to have a linear Phase The filter is to have
gain scaling of comb filter
Hi everyone, I have a 3rd order CIC comb filter with decimation ratio of 16. The freq response of the filter shows a gain of 60...
Hi everyone, I have a 3rd order CIC comb filter with decimation ratio of 16. The freq response of the filter shows a gain of 60 dB. How do I scale the gain of this filter to 0 dB? Do I minus 1000 from each of the coefficients of the filter, Hz? One of the paper I read uses a po
change a dsp filter for varios sampling frequency
inDear all i have a digital filter H(Z)=1/32*(1-z^-6)^2 /(1-z^-1)^2 with sampling rate being 200Hz, the filter has a rather loe cutoff...
Dear all i have a digital filter H(Z)=1/32*(1-z^-6)^2 /(1-z^-1)^2 with sampling rate being 200Hz, the filter has a rather loe cutoff frequency of fc=11 Hz and introduces a delay of 5 sample or 25ms.this filter provides an attenuation greater than 25dB at 60Hz,and effectively suppresses power-line interference,if present. i make this filter in MATLAB with command:
Kalman filter
Hello everyone!! Im struggling on a simple assignment. I have to filter specific data (which are in .xls format) using the "optimal" kalman...
Hello everyone!! Im struggling on a simple assignment. I have to filter specific data (which are in .xls format) using the "optimal" kalman filter in both ARMAX and ARX models. the struggle is on how to connect the data from the xls file to the filter... here i give u my kalman filter with the comments --------------------------------------------------------------------- % s = kalm...
FIR filter design
inHi I'm busy designing a decimation filter which takes 8 bits from a excessively oversampled ADC and decimates the signal. I need a...
Hi I'm busy designing a decimation filter which takes 8 bits from a excessively oversampled ADC and decimates the signal. I need a FIR filter to have an increased resolution. For example 8 bits into the filter but I need 13 bits out. If anyone could tell me how to make design that filter in matlab it would be of great help. Thank you.
IIR filter to 2d filter
hi.can anyone tell me which command can i use to convert an IIR filter into 2D filter.i searched alot but couldn't find anything.please help me...
hi.can anyone tell me which command can i use to convert an IIR filter into 2D filter.i searched alot but couldn't find anything.please help me out
Adaptive Filter for ECG for Motion Artifact reduction
Hi, I'm currently working on a project to filter out the noise produced from movement in the ECG Signals with an adaptive Filter. I was wondering...
Hi, I'm currently working on a project to filter out the noise produced from movement in the ECG Signals with an adaptive Filter. I was wondering if someone here has had some experience with it, and if he or she could provide me with a sample in order to get an insight on the filter. =) I would really appreciate it! many thanks Harry
Relate lowpass filter cutoff frequency with real frequency (Hz) to filter from a sampled signal?
Hello to all, My problem is the following: I have a signal x that was sampled with Fs = 8000 Hz and sampled 1000 samples. I want to...
Hello to all, My problem is the following: I have a signal x that was sampled with Fs = 8000 Hz and sampled 1000 samples. I want to filter the signal using a truncated version of an ideal discrete lowpass filter getting the filter coefficients b with the sinc function: k = -100:1:100 ; b = (1/Wc) sinc (Wc * k) ; I want to filter frequencies higher than 2500 Hz, I must somehow re...
question encountered during frequency response masking fir design
inhi everyone: I have all the component filter to make the overall filter, but could anyone tell me how to put them together in matlab and...
hi everyone: I have all the component filter to make the overall filter, but could anyone tell me how to put them together in matlab and plot the overall filter? I am stucked at two points:how to find a complementary filter of given fir,how to implement a adder in matlab. I am really really frastrated now,thanks to all kind reply. mengyao
strange result for filter design
inHello, The following code fails completely. Instead of producing the requested filter it returns the filter coefficients...
Hello, The following code fails completely. Instead of producing the requested filter it returns the filter coefficients as all zeros. Here's the code: % design narrowband filter f = [0.444 0.49 0.51 0.556 ]; a = [0 1 0]; dev = [0.0
Matched Filter
inHey Guys, how are you all doing? i have a project to do and im not sure if im doing it right .. the professor gave us a file...
Hey Guys, how are you all doing? i have a project to do and im not sure if im doing it right .. the professor gave us a file to filter by doing a matched filter .. i loaded the file .. then what i did for the matched filter is that i defined the impulse response
question on the usage of the m-file "filter"
Hi, Trying to use the M-file "filter" to filter out a high-freq signal from a composite signal. num,den gives the co-efficients...
Hi, Trying to use the M-file "filter" to filter out a high-freq signal from a composite signal. num,den gives the co-efficients of a Low-Pass filter with cut-off freq near 0.25*pi The filter works fine when the step_size variable is greater than 0.8 The
Compensation filter
Dear all, I'm Andrea and this is my first post on DSPRelated. I have a trouble that I can't solve. I have a generic system whose output,...
Dear all, I'm Andrea and this is my first post on DSPRelated. I have a trouble that I can't solve. I have a generic system whose output, in the frequency domain, has a module proportional to the fourth power of angular frequency [ |.| proportional to w.^4 ]. I have to build a FIR filter that compensates this phenomena. So the filter is a sort of lowpass filter decaying with an inverse fou...
Re: NEED TO DESIGN A LOW P ASS FILTER
try fdatool in matlab. It is helpful. > > I need to design a low pass filter with cut-off frequency 150Hz.since > my algorithm involves...
try fdatool in matlab. It is helpful. > > I need to design a low pass filter with cut-off frequency 150Hz.since > my algorithm involves finding the difference between the energy of the > signal before and after passing through the filter ,I need the filter > to have very high efficiency. > > I found ellip - 4th order to have good performance.But i need a better > one. > Could anyone suggest me