Hi all, I know this is a Matlab discussion group, but I would like to ask regarding DSP in Excel? Can anyone please enlighten me, what does...

Hi all, I know this is a Matlab discussion group, but I would like to ask regarding DSP in Excel? Can anyone please enlighten me, what does it mean by Normalised Sampling? How many type of sampling are there? How to perform a non-normalised sampling in excel? I have been to many excel forum but majority of them are excel's expert, not DSP's expert. Thanks in advance:)

Hi everybody, I have some question about sampling bandpass signals. There is sampling theorem for this kind of signals, the...

Hi everybody, I have some question about sampling bandpass signals. There is sampling theorem for this kind of signals, the sampling rate must be two times the frecuency of the max information component instead of the max frecuency afther modulation. If you play with the

Hi, Can any one help with simulik zero order hold (zoh) block. I want the sampling time in the zoh block as a varying input during...

Hi, Can any one help with simulik zero order hold (zoh) block. I want the sampling time in the zoh block as a varying input during simulation run. My sampling time of the zoh block is changing and i want to hold the input signal for that varying hold time (Sampling time paramet

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

Hi, Can anybody please tell me how to set up the sampling freq for a combined filters. The sampling freq for the input signal to...

Hi, Can anybody please tell me how to set up the sampling freq for a combined filters. The sampling freq for the input signal to the first filter h1 is 1.5Mhz, the output of the first filter is then downsampled to 96khz and feed into the second filter h2. h12 is the convolution

I am working on modal testing of structures using forced hammer excitation. Response time series has a sampling frequency of 250Hz and the...

I am working on modal testing of structures using forced hammer excitation. Response time series has a sampling frequency of 250Hz and the excitation time series has a sampling frequency of 500Hz. Should the plot of FRF magnitude versus frequency be as a function of the response or excitation frequency? Or which sampling frequency would govern the FRF plot? Secondly, for a single-point excitati...

I have a digital filter that is designed for 1kHz sampling frequency. Everything else remaining the same, I want that filter to work for 4...

I have a digital filter that is designed for 1kHz sampling frequency. Everything else remaining the same, I want that filter to work for 4 kHz sampling frequency. What do I need to do? I am not a filter guy and my background is power system. That is why I am asking you here this basic question. Kailash

A filter designed at 1kHz sampling rate, when used at 4kHz sampling rate, its frequency response will be stratched 4 times. For example the...

A filter designed at 1kHz sampling rate, when used at 4kHz sampling rate, its frequency response will be stratched 4 times. For example the new cut-off frequency will be 4 times the original. If you want to keep similar frequency responce as the original, you need to redesign the filter. Normally you have to use more cofficients in the new design in order to keep the same shape. Use the filt...

i'm new here, i am doing my university project on speech recognition, if somebody could tell me how to convert recorded speech...

i'm new here, i am doing my university project on speech recognition, if somebody could tell me how to convert recorded speech sampling? i've already try using resample code from matlab, but the result was that the sound of speech file dosen't sound very nice. the code that i use was

hi all, actually i'm still newbie here compare to all of you. i have a question about peakvue.is there anyone have ever try to simulate for...

hi all, actually i'm still newbie here compare to all of you. i have a question about peakvue.is there anyone have ever try to simulate for showing peakvue measurement in MATLAB? i think the process can be describe as: 1. sampling (we choose Fmax as a limit to show in freq domain and the sampling freq will be automatically determined 2.56*Fmax) 2. pass the signal through high pass fil...

Hi everyone, Just one little question. I want to plot a signal y (where y is a column of a matrix). The sampling rate was 500Hz Is...

Hi everyone, Just one little question. I want to plot a signal y (where y is a column of a matrix). The sampling rate was 500Hz Is there a way when using the plot command (i.e. plot(y) ) to view the time (x ax) in seconds and not in sampling points? Thank you in advance Christos Katsis

All Background: I have working with ultrasound signals (300 Khz) from a solid state sensor to a target at 3". The received signals from...

All Background: I have working with ultrasound signals (300 Khz) from a solid state sensor to a target at 3". The received signals from the sensor (300 Khz) are digitized through a sampling card and imported into MATLAB, to preserve the time information as precisely as possible, sampling frequency is high Fs = 50Mhz. To generate a envelope on the 300Khz received

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...

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:

Hi everybody, My problem is as follows: I get data from a fft analyser after numerous averaging in order to remove the noise. Now in...

Hi everybody, My problem is as follows: I get data from a fft analyser after numerous averaging in order to remove the noise. Now in order to use it i have to take the IFFT of this data in Matlab. But fft analyser(any) while taking fft take sampling frequency as 2.56 times the maximum frequency specified. But when IFFT is taken in matlab it will just do

hai friends i have problem in modelling a rayleigh fading channel. in matlab one command for rayleigh channels ,in that the...

hai friends i have problem in modelling a rayleigh fading channel. in matlab one command for rayleigh channels ,in that the parameters sampling rate , dopplershift and delay spread. i wnat a impluse reponse of the chhanel for some sampling rate and delay spread. how can i proceed? one more is i have to model the 3 or 4 tap channel. given data was just delay spread. how can choose delay v...

Hello everyone, I was wondering if anyone could give me their insight to this problem. I am trying to understand how to use a bandpass filter...

Hello everyone, I was wondering if anyone could give me their insight to this problem. I am trying to understand how to use a bandpass filter in butter to pass only a certain band of frequency. This works for a simple cosine with one frequency, but with a summation of cosines.. dt=.001; %sampling rate Fs=1/dt; %sampling freq HalfFs=Fs/2; t=-10:dt:10; m=cos(2*pi*49*t)+cos(2*pi*50*t); ...

Hello, I was hoping I could get some help on designing a high pass filter for very, very low frequency signals (relative to the sampling...

Hello, I was hoping I could get some help on designing a high pass filter for very, very low frequency signals (relative to the sampling rate). The frequencies I'm looking at are: 20Hz sampling, I want to filter off everything below 1/30Hz (or 1/15 if that's the best I can do). My application is very lag and phase shift sensitive. I have to double integrate this filtered signal, and the bett...

I am working with a signal that was sampled at a variable rate and consists of an array of values and a separate array of sample times. The...

I am working with a signal that was sampled at a variable rate and consists of an array of values and a separate array of sample times. The sample intervals are random and are not multiples of any common value. I need to convert this signal to a single array with a known, fixed sampling rate. Does anyone have suggestions as to how I would go about this? Thanks, Chris

Hi all, Suppose I have a matrix X as follows, 2 3 4 1 8 7 6 2 1 2 5 7 4 7 2 ...

Hi all, Suppose I have a matrix X as follows, 2 3 4 1 8 7 6 2 1 2 5 7 4 7 2 3 Then how should I write a code to sample two row ramdomly (called Y) from that matrix. At last, I must have two matrix; X matrix must become 2x4 (with remaining row after sampling) and Y matrix (2x4). Please help me as soon as possible. Thanks i...

Hi,I would like to ask about my Fsk code.Why when i change my ts value to 0.05 or 0.005,i'm not able to get the correct Fsk signal?Anybody can...

Hi,I would like to ask about my Fsk code.Why when i change my ts value to 0.05 or 0.005,i'm not able to get the correct Fsk signal?Anybody can help me?Below is what my code looks like.. echo on t0=0.6; %signal duration ts=0.0005; %sampling interval fc=200; %carrier frequency kf=50; %modulation index fs=1/ts; %sampling frequency t=(0:ts:t0); %tim...