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# Discussion Groups | Matlab DSP

Technical discussion about Matlab and issues related to Digital Signal Processing.

## Re: gain scaling of comb filter 0

wuqi...@yahoo.cn - May 20 2009
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...

## how to transform from analog Bandpass filter ----->equivalent Lowpass filter 0

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 trans...

## digital filters 0

Sergio Dominguez - Aug 27 2004
Hi all, I have written a digital filter (quite simple and generic) as a*s^2+b*s+c ___________ d*s^2+e*s+f The filter discretized using Tusting. The c...

## filter applicaion [2 Articles] 0

Harsh Pradhan - Dec 15 2005
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 fdatoo...

## Matched Filter [3 Articles] 0

xoticsmile - Dec 25 2004
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 filt...

## NEED TO DESIGN A LOW P ASS FILTER [2 Articles] 0

itsmedevi_86 - Nov 28 2007
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 t...

## gain scaling of comb filter 0

egan_nc - Jul 29 2003
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 thi...

## FIR filter design [2 Articles] 0

"marinus.yates" - Sep 13 2007
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...

## Re: NEED TO DESIGN A LOW P ASS FILTER 0

wuqi...@yahoo.cn - May 20 2009
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 ene...

## Filtering 3d Data 0

simon connol - Aug 12 2003
Hi guys !! First of all, I'd like to say that this group is really excellent, atleast we people who have questions regarding Matlab can communicate with Other pe...

## Unknown Filter Type [2 Articles] 0

larkjon - Jan 13 2005
Hi, I may have inadvertly posted this twice. If so, I apologize. I've "inherited" the following filter: Yn = Yn-1 + C(Xn-Xn-1)^2 - C(Xn-Xn-1)(Yn-1)...

## block processing, filter behaviour 0

competitions_2005 - Oct 28 2005
Hello I have a question about filter behaviour and block processing. I have a signal x[k]=s[k]+n[k] where s is clean speech and n is colored, gaussian noise. In...

## circular high pass filter 0

enriquefergosa - Jul 7 2003
Hallo, I need help. I would like to do a 2D circular high pass filter using the matlab function FSPECIAL('DISK', RADIUS) but, this function is a low pass filter re...

## Adaptive Filter for ECG for Motion Artifact reduction 0

Harry - Jun 11 2012
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 expe...

## IIR filter to 2d filter 0

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 ...

## question encountered during frequency response masking fir design [2 Articles] 0

fu_mengyao - Oct 10 2008
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 stu...

## filter 0

reshma_jacob - Feb 4 2004
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...

## Re: RE: filter function in matlab for awgn 0

Mandar Rahurkar - Feb 27 2004
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 ...

## Decimation Filter Specification Object 0

usu_...@yahoo.com - Oct 18 2010
Hello, Thanks for a helpful forum. I have two questions. 1. I am trying to implement a simple FIR filter. All I do is sum 100 samples of the input to get the output. ...

## How to inverse a FIR Filter using Matlab 0

LĂȘ Anh - Sep 10 2012
Hi Everybody Im new here und i have a question from my Bachelorthesis In a Matlab system ,I have the estimated transfer function from the channel, simply ch_est (in frequency...

## Relate lowpass filter cutoff frequency with real frequency (Hz) to filter from a sampled signal? 0

Mário_Costa - Aug 21 2009
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 ver...

## question for filter implementation 0

nasim ahmed - Jan 10 2006
hi guys, This is nasim, i am working as a DSP engg. in chennai ( india ). My work is to convert many matlab functions in C. just like linkage, cluster and to implement filter in...

## Fillter design 0

nazia - Apr 19 2003
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 ...

## change a dsp filter for varios sampling frequency [2 Articles] 0

emilly - Aug 30 2005
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 d...

## filter and downsample [3 Articles] 0

egan_nc - Jun 30 2003
Hi, I designed a filter using remezord function. When I filtered the input first and downsampled later, the filter works fine. out2a=filter(h1,1,out1a); out2b=d...

## quantization after multiplication 0

#ARIJIT BISWAS# - Nov 27 2003
Dear List: I have a doubt in filter implementation! I wish to include the effect of quantization after multiplication with the filter coefficien...

## RE: filter function in matlab for awgn 0

Glen Ragan - Feb 27 2004
Yes, the filter() function will do filtering. Since you seem to be doing signal detection, you would also be interested in convolution, conv(), with the time-revers...

## strange result for filter design [5 Articles] 0

Moshe Malkin - Jan 6 2003
Hello, The following code fails completely. Instead of producing the requested filter it returns the filter coefficients as all zeros. Here's the code:...

## Problem in Bandpass filter, passband reappear after half sampling frequency [4 Articles] 0

Henry Chang - Sep 18 2002
Hi all, I am beginner in digital filter design. Currently, I am designing a bandpass filter cut-off at 500hz and 1.8khz, with sampling frequency 6k Hz. I use b...

## Filter design using Remez Exchange Algorithm 0

himab_g - Jan 20 2006
Hi I am new to filter design. I have to design Smith-Barnwell Filters for lengths N= 4,8,16,31,64.. using Remez Exchange Algorithm. These are the steps to design the filt...

## about cic filter problem [5 Articles] 0

liux...@yahoo.cn - Apr 8 2009
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 c...

## Bandpass filter 0

jk_meher - Nov 4 2008
Hi, I have to design a band pass filter followed by a decimator in some application .Design of digital band pass filter is ok.But how to implement filter followed by decim...

## filter function 0

cherrymata - Feb 24 2004
Hi All, is there any filter function in matlab that can filter the signal disturbed by awgn (additive white gaussian noise) ? can anyone help me... thx ve...

## filter design 0

elham askari - Feb 21 2010
hi dears I have designed  a chebyshev 1 filter by matlab by impulse invariance method with these below codes now I want to perform this filter on an image and see the result effe...

## Implementation of Linear phase IIR filter [7 Articles] 0

sham ganth - Sep 26 2003
Sir, Iam trying to implement Linear phase IIR filter. My problem is that i want to reset the state variable of the Elliptic lowpass filter i want your suggestions...

## Help using butterworth filters [2 Articles] 0

cool...@hotmail.com - Nov 2 2005
Hello, I'm currently taking an Electrical Engineering class but I'm a Mathematics Graduate student so I'm missing some of the screws that put this whole shebang together so I'm ...

## Filter Design(Complex Bandpass Filter) 0

adnan kiani - Jan 10 2008
Hello; I need some help regarding complex bandpass filter design. The task is to design a complex BPF with passband at 8-12MHz and stopbands at -16-7MHz and 13-16MHz. The idea is ...

## Halfband and FIR filter for decimation 0

feyzakent - Feb 11 2011
Hi, I want to design a decimation filter for a Sigma-Delta modulator. The modulator input is 20Khz sinus signal. And this signal is oversampled to 2.5Mhz. So decimation ratio is...

## how to resample a z transformation??? [6 Articles] 0

stefanosorrentino - Nov 28 2002
Hello friends. I have an apparently unsolvable problem: I have a given IIR filter (they give me the poles and the zeros). The filter was originally sampled at a g...

## frequency sampling filter design code [2 Articles] 0

Appalayagari Sreedhar - Oct 10 2002
Hi, I am sreedhar. i am some problem with designing the frequency sampling fir filter, i need a frequency sampling filter design matlab code, actually i ...
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