Specifications of Band pass filter

Started by arur...@yahoo.co.in in Matlab DSP13 years ago 2 replies

hi every body, i am implementing a Band pass FIR filter,my centre freq is 5k and by band of interest is 2.5k to 7.5k.My doubt is how to make...

hi every body, i am implementing a Band pass FIR filter,my centre freq is 5k and by band of interest is 2.5k to 7.5k.My doubt is how to make decission on passband freq1,passband freq2,stopbandfreq1,stopbandfreq2. please let me know.


workspace coefficients in Simulink

Started by Nalin Pithwa in Matlab DSP17 years ago 1 reply

Hello, I am using MATLAB and Simulink based DSP/Communications Blockset in my application. I need a small help. In the design...

Hello, I am using MATLAB and Simulink based DSP/Communications Blockset in my application. I need a small help. In the design of my system, one of the blocks is a FIR filter. The filter coefficients are generated during run-time and they change adaptively. How can


90 degree phase shifter for 60Hz

Started by mehm...@gmail.com in Matlab DSP9 years ago

Hi, I?m trying to implement hilbert filter with a narrow ripple and my limited processing power. TW = 35; % Transition Width 35...

Hi, I?m trying to implement hilbert filter with a narrow ripple and my limited processing power. TW = 35; % Transition Width 35 Hz Apass = 0.02; % Passband Ripple (dB) -> variation 0.1% Fs = 1024; % Sampling Frequency h = fdesign.hilbert('TW,Ap', TW, Apass, Fs); Hd = design(h, 'equiripple'); Hhilb = FilterStructure: 'Direct-Form FIR' Arithmetic:


Remez Filter Design in MATLAB

Started by Anonymous in Matlab DSP18 years ago 1 reply

Hi There, Can any one tell me how to design a low pass FIR filter using remez exchange algorithm in MATLAB. An...

Hi There, Can any one tell me how to design a low pass FIR filter using remez exchange algorithm in MATLAB. An example will be highly appreciated. I tried with some parameters but it says filter could not converge. Thanks!!! --Sur


Compensation filter

Started by riva...@gmail.com in Matlab DSP9 years ago

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...


separating passband zeros and stopband zeros

Started by Appalayagari Sreedhar in Matlab DSP17 years ago 1 reply

Hi, I am working on the filter design, i am designing the FIR filter, i want to know exactly which zeros corresponds to...

Hi, I am working on the filter design, i am designing the FIR filter, i want to know exactly which zeros corresponds to passband and which zeros to stopband. how to get them i can get the zeros all by using the command tf2zp


Implementation of Parks-McClellan method without using remez function

Started by pankaja_p2000 in Matlab DSP12 years ago

Hi friends, Can any one provide me with the code for the Implementation of Parks-McClellan method without using remez function.I...

Hi friends, Can any one provide me with the code for the Implementation of Parks-McClellan method without using remez function.I am in urgent need of it.I am doing a project on designing different methods for the design of FIR filters.


fractional delay filters when sampling at nyquist rate

Started by cathy zuccini in Matlab DSP14 years ago

Hi, I'm working on a DSP project (speech coding and synthesis) involving fractional delay filters. I would appreciate it if you can send me...

Hi, I'm working on a DSP project (speech coding and synthesis) involving fractional delay filters. I would appreciate it if you can send me matlab codes for implementing fractional delay filters with baseband and fullband approximation, errors between FIR filters designed using these two methods, IIR design of FD filters as well as any other documentation about FD


Decimation Filter Specification Object

Started by usu_...@yahoo.com in Matlab DSP9 years ago

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...

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. Y = X(100) + X(99)..........X(1). I want to create a filter object for this filter. The question is - Do I use a FORM I, or a FORM II structure, i.e, do I use dfilt.df1, or dfilt.df2 function in matlab? 2. I...


recursive frequency sampling filter design

Started by Appalayagari Sreedhar in Matlab DSP17 years ago 1 reply

Dear all, I am working on the recursive frequency sampling filter design. My confusion is, I read the theory saying that as...

Dear all, I am working on the recursive frequency sampling filter design. My confusion is, I read the theory saying that as it contains the poles.and also exactly pole zero cancellation occurs to give the stability. in case of fir filter using remez or any,


Physiological Filtering

Started by chri...@gmail.com in Matlab DSP13 years ago

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...


poles and zeros

Started by smita shekar in Matlab DSP16 years ago

Hi, Wanna know how do you find the magnitude response of an FIR filter from the the pole-zero plot in the Z-plane...i know that...

Hi, Wanna know how do you find the magnitude response of an FIR filter from the the pole-zero plot in the Z-plane...i know that at poles the magnitude is maximum and itz minimum at zeros...but how do you plot the response when there are a large number of poles and zeros.......


Import Simulink algorithms in Visual DSP++ ?

Started by Zlatko Petroff in Matlab DSP17 years ago

Is there any possibility to import Simulink algorithms (for example FIR filter) in Visual DSP++ 2.0 for DSP 21161? Thank...

Is there any possibility to import Simulink algorithms (for example FIR filter) in Visual DSP++ 2.0 for DSP 21161? Thank you in advance! Zlatko


doubt on amplitude of fft points

Started by mainraghav in Matlab DSP11 years ago 1 reply

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 ...


problem in getting execution time in MATLAB

Started by label comments in Matlab DSP11 years ago

hello everyone, i am Mahantesh from BASAVESHWAR ENGG COLLEGE,BAGALKOT. INDIA we are doing our final year project on polyphase implementation of...

hello everyone, i am Mahantesh from BASAVESHWAR ENGG COLLEGE,BAGALKOT. INDIA we are doing our final year project on polyphase implementation of fir filter banks using MATLAB .we have used a kaiser window digital filter in this.our aim of project is to implement the polyphasing of filter such that it reduces the time needed for convolution with any large input signal like speech and image signal...


Weighted Moving Average

Started by Marzieh in Matlab DSP15 years ago

I have a set od data that have noise,I want to smooth and reduced this data with this method(weighted moving average). I find a...

I have a set od data that have noise,I want to smooth and reduced this data with this method(weighted moving average). I find a function such that "tsmovavg" but have problem about weight vector that use in this method. I have another problem about FIR toolbox. Please


Rayleighchan function in matlab

Started by thouraya ben salem in Matlab DSP13 years ago 1 reply

Hi all, I am modelling a multipath rayleigh channel using matlab function Rayleighchan. This function models the channel as a FIR...

Hi all, I am modelling a multipath rayleigh channel using matlab function Rayleighchan. This function models the channel as a FIR filter. You can find the algorithm in the matlab help rayleighchan page or look at the document attached. Can anybody help me understand the algorithm? why is the channel modelled as a sum of sinc? Best Regards, Thouraya


frequency sampling filter design code

Started by Appalayagari Sreedhar in Matlab DSP17 years ago 1 reply

Hi, I am sreedhar. i am some problem with designing the frequency sampling fir filter, i need a frequency sampling...

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 want to do the design using the genetic algorityhm, but i am confused with the selection of length of th


C equivalent code

Started by jonas yu in Matlab DSP14 years ago 2 replies

Hello everybody, I have a ".m" & ".mdl" file in MATLAB that uses filter design toolbox to create fir interpolation, decimation & multirate...

Hello everybody, I have a ".m" & ".mdl" file in MATLAB that uses filter design toolbox to create fir interpolation, decimation & multirate filters. Is there any method/tool/program that can generate the exact equivalent C/c++ code that performs the same function as the corresponding ".m" & ".mdl" was doing? All type of replies a


Designing a Notch Filter

Started by maha devi in Matlab DSP12 years ago 2 replies

Hi friends, I need to design a notch filter using matlab.. can anyone tell me if any inbuilt command is available for designing a...

Hi friends, I need to design a notch filter using matlab.. can anyone tell me if any inbuilt command is available for designing a notch filter in matlab.how can i specify the frequency which should be attenated and the bandwidth of notch???? also, i need to design a FIR FILTER using window method. Can i use FDATOOL for designing it...If so..where should i mention the Number of taps and ...