Inverse filter

Started by luth...@yahoo.com in Matlab DSP10 years ago

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...


adaptatif filter lms

Started by abir hadrich in Matlab DSP12 years ago 1 reply

hello, im new to the topic of adaptive filters and its implementation in matlab. im doing a project on 'filtering an ECG foetus'. we are...

hello, im new to the topic of adaptive filters and its implementation in matlab. im doing a project on 'filtering an ECG foetus'. we are carrying out all our analysis on an ECG wave with only a powerline interference (60hz). the signal available to us is an ECG wave with a noise component of 60hz, sampled at 360hz.. can you help me implement an adaptive filter using LMS algorithm for this s...


ADC in Matlab, really-really need your help!

Started by "photonic.crystal" in Matlab DSP12 years ago

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


lms notch adaptive filter

Started by el01...@mail.ntua.gr in Matlab DSP12 years ago

hello, > > im new to the topic of adaptive filters and its implementation in matlab. im doing a project on 'filtering an ECG foetus'. we...

hello, > > im new to the topic of adaptive filters and its implementation in matlab. im doing a project on 'filtering an ECG foetus'. we are carrying out all our analysis on an ECG wave with only a powerline interference (60hz). > > the signal available to us is an ECG wave with a noise component of 60hz, sampled at 360hz.. > can you help me implement an adaptive filter using LMS algorithm f


how to read DAT signal in matlab

Started by firaqness in Matlab DSP13 years ago

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..


Ridge frequncy estimation of fingerprint image for Gabor filter

Started by paria rahmani in Matlab DSP13 years ago

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.


Multichannel Sampling - Filtering in Freq. Domain

Started by scott_t72 in Matlab DSP10 years ago

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...


Time reversed processing for maximum phase filter in 8PSK

Started by Sundar Rajan in Matlab DSP11 years ago

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...


how to do noise filtering in an audio signal?

Started by Muhammad Shahid Munir in Matlab DSP17 years ago 1 reply

Bonjour. 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


Convolution and Filtering

Started by icpower2000 in Matlab DSP13 years ago 2 replies

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...

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

Started by rira1807 in Matlab DSP8 years ago

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...


Filtering Guassian noise with Matlab

Started by tu5752 in Matlab DSP14 years ago 5 replies

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...

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)