## Forums Search for: Filtering

## ADC in Matlab, really-really need your help!

Hi everyone! I need your help! Anyone can share a Matlab code modelling an analog./digit. converter? A very basic one, just reading the...

Hi everyone! I need your help! Anyone can share a Matlab code modelling an analog./digit. converter? A very basic one, just reading the data vector, oversampling it, quantizing, shaping the noise, filtering and decimating. Any sort of simple Matlab codes or files would help (especially i´m interested in noise-shaping modelling). A simple model would be of great use, ´cause

## Interpolation/Decimation

I had a real digital signal with digital frequency f1=1/5.Changed the sample rate by a factor of 5/8 through a combination of ...

I had a real digital signal with digital frequency f1=1/5.Changed the sample rate by a factor of 5/8 through a combination of filtering,decimation and interpolation. Then I plotted the power spectrum of the original signal and then the changed signal.The signal seemd to have b

## Covariance estimation - disregarding phase info

Hi ! I?m facing the following problem: I would like to estimate the covariance of two signals and in particular a pure sinusoidal with 10Hz...

Hi ! I?m facing the following problem: I would like to estimate the covariance of two signals and in particular a pure sinusoidal with 10Hz frequency (s1) and another one formed by band-pass filtering white noise in the band of 9-11Hz (s2). The problem is that I don?t want the estimate to be biased by the phase of the signals. To be more precise, I would like to have a measure of how closer the s...

## Inverse filter

Hi All I'm doing on Robust Speaker identification/verification for telephony applications for my final year project.I pass through my clean...

Hi All I'm doing on Robust Speaker identification/verification for telephony applications for my final year project.I pass through my clean speech signal to low-pass filter with cut-off frequency 3.4kHz. I want to use inverse filtering about 4~5kHz. I think the step will be 1. transform the telephony speech into frequency domain 2. i need to get back the original S(z)=c(z)/H(z) where S(z) i...

## how to read DAT signal in matlab

hi every body.. could someone guide me how to read DAT file(signal in Mhz)and load into MATLAB coz i want to plot the signal from these DAT...

hi every body.. could someone guide me how to read DAT file(signal in Mhz)and load into MATLAB coz i want to plot the signal from these DAT file and make some filtering on this signal..

## how to do noise filtering in an audio signal?

inBonjour. I have an signal(rough.wav) which is impulse response of a system. The impulse response should ideally be like smooth.wav...

Bonjour. I have an signal(rough.wav) which is impulse response of a system. The impulse response should ideally be like smooth.wav .i.e. A smooth damped harmonic oscillation. Please tell me how to filter rough.wav to get smooth.wav , Both these files are in signals.zip in the files s

## Time reversed processing for maximum phase filter in 8PSK

Hi I'm trying to compare performance with and without minimum phase prefilter for 8PSK equaliser with a DDFSE. When we employ a prefilter,...

Hi I'm trying to compare performance with and without minimum phase prefilter for 8PSK equaliser with a DDFSE. When we employ a prefilter, we use min phase all pass prefilter for 2nd half and max phase all pass prefilter for 1st half. Hmin_ap , Hmax_ap would be these all-pass filters for filtering data, and Hmin and Hmax would be channel estimates to give to DFSE, correspondi...

## Multichannel Sampling - Filtering in Freq. Domain

Hi, I am creating a Matlab model of a multichannel system where the input signal is sampled below the Nyquist rate in each channel, but is still...

Hi, I am creating a Matlab model of a multichannel system where the input signal is sampled below the Nyquist rate in each channel, but is still recoverable because each channel has a uniform phase offset. In this case there are M=3 channels that sample at half the Nyquist Rate (L=2). The channels have uniform phase offsets of [0 Tsamp/3 2*Tsamp/3]. When corrected and interleaved, the output sh...

## Ridge frequncy estimation of fingerprint image for Gabor filter

Hi.I'm working on fingerprint image enhancement & minutiae extraction,i don't know how to estimate ridge frequency of fingerprint image to...

Hi.I'm working on fingerprint image enhancement & minutiae extraction,i don't know how to estimate ridge frequency of fingerprint image to filtering by Gabor filter(in time domain not in frequency domain).if anyone can help me,please contact me. Thanks a lot.

## Filtering Guassian noise with Matlab

inHello all, I'm generating a 1 kHz square wave and adding Guassian noise to obtain a SNR of 0 dB (using Matlab6.5). The task is to design a...

Hello all, I'm generating a 1 kHz square wave and adding Guassian noise to obtain a SNR of 0 dB (using Matlab6.5). The task is to design a filter that will filter out as much noise as possible from the square wave plus noise signal. The sampling frequency is 100kHz. Noise signal: 100.0*randn(1, length(t)) Square wave: 100*square(2*pi*1000*t)

## Convolution and Filtering

inHi to all: I have this program. My question is at the end of this program below. clf; h=[3 2 1 -2 1 0 -4 0 3]; x=[1 -2 3 -4 3 2...

Hi to all: I have this program. My question is at the end of this program below. clf; h=[3 2 1 -2 1 0 -4 0 3]; x=[1 -2 3 -4 3 2 1]; y=conv(h,x); n=0:14; subplot(2,1,1); stem(n,y); xlabel('Time index n');ylabel('Amplitude'); title('Output Obtained by Convolution');grid; x1=[x zeros(1,8)]; y1=filter(h,1,x1); subplot(2,1,2); stem(n,y1); xlabel('Time index n');ylabel('Amplitude'); ...

## Constrained Stability Least Mean Square (CSLMS) algorithm

Hi, I'm new to the topic of adaptive filters and its implementation in matlab. I want to filtering an 'ECG signal'. can you help me to...

Hi, I'm new to the topic of adaptive filters and its implementation in matlab. I want to filtering an 'ECG signal'. can you help me to implement an adaptive filter using Constrained Stability Least Mean Square (CSLMS) algorithm or this signal in matlab(it is a new algorithm that I find it in the publications) I don't know which the value of(step size) I have to use, filter order, necessa...