## 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

## 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...

## 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

## 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

## 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

## 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...

## 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

## 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.

## 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:

## 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

## 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

## 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

## 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...

## about cic filter problem

inHello all, In the book of "understanding of digital signal processing", it is said that cic filter has a inherent problem which is cic filter...

Hello all, In the book of "understanding of digital signal processing", it is said that cic filter has a inherent problem which is cic filter can not remove the outband imgage clearly and the image will be folded into the real signal when decimation especially when stage of cic filter is very small. But there is an integrater ahead of decimation. Is the integrater a good low pass filter enoug...

## FIR or IIR?

inHallow, please help me about choosing FIR or IIR filters I have a DSP/FPGA system to process signal and I want to design a filter to filter my...

Hallow, please help me about choosing FIR or IIR filters I have a DSP/FPGA system to process signal and I want to design a filter to filter my input signal. I need to know which one is better for me, FIR filter or IIR filter. For my application I need to meet all the requirements below: 1) Low ripple 2) Linear Phase response 4) Sharpness: to block noise 5) Complexity (inherent group pha...

## 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

## Re: gain scaling of comb filter

Hi, have you get your answer? I am a beginner of this field. I am in a project that have to use the CIC filter. The gain of the filter also puzzle...

Hi, have you get your answer? I am a beginner of this field. I am in a project that have to use the CIC filter. The gain of the filter also puzzle me a lot. In matlab, I could just divide by 1/gain(CIC) before or after the CIC to scale the gain of this filter to 0 dB. But I don't know how to implement it in verilog or in the hardware. Also I don't know whether is it necessary. > > > > H

## 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