44 Threads found on edaboard.com: Hamming Matlab
Have you tried searching MathWorks for "DTMF"? This is the first hit:
By the way, the DTMF tones in the wav file are 201020. I did this in matlab:
x = wavread('batandsplab.wav');
specgram(x, 512, 8000, hamming(512), 500);
PC Programming and Interfacing :: 13.03.2005 11:27 :: echo47 :: Replies: 18 :: Views: 8431
How about this?
N=64; h=fir1(N-1, , hamming(N)); freqz(h,1,512);
I think a hamming window has fixed characteristics. If you change its ripple or attenuation, then it isn't a hamming window anymore.
Digital Signal Processing :: 30.03.2005 23:14 :: echo47 :: Replies: 7 :: Views: 1737
You specified "Welch", and that applies hamming weighting, so you no longer have a cosine wave. hamming weighting spreads the peak and causes sidelobes 42dB below the peak.
Mathematics and Physics :: 16.10.2005 03:20 :: echo47 :: Replies: 4 :: Views: 16702
There is a matlab demo in help file on PSD.
fs = 1000; % Sampling frequency
t = (0:fs)/fs; % One second worth of samples
xn = sin(2*pi*50*t);
Hs = spectrum.periodogram('hamming');
Pow = (fs/(2*length(Pxxo)))
Digital Signal Processing :: 15.10.2005 11:38 :: neoflash :: Replies: 3 :: Views: 750
The command fir1 in matlab implements digital filters based on the window methods , as you indicated the comand h=fir1(n,wn) returns the nth +1 coeficients of a hamming window lowpass linear filter, the vector h is the coeficients of the filter from wich you will convolve the sample demodulated signal. If you want to use other window than (...)
Digital Signal Processing :: 08.12.2005 22:35 :: claudiocamera :: Replies: 9 :: Views: 31178
i have a question here and i am done with the first part on designing the bandpass filter by writing a matlab script below.
% M file for bandpass FIR filter
Digital Signal Processing :: 20.03.2006 03:28 :: scdoro :: Replies: 4 :: Views: 1741
Hallo guys...I am facing a huge problem to the two questions below cause i have never had used matlab in the past..:
1) Investigate functions available in matlab for GF(2) calculus and repeat a (5, 2) hamming code by using matlab.
2). Design syndrome decoder for Q.5 by using matlab
Any help (...)
Digital Signal Processing :: 05.12.2010 15:57 :: Georgechalkida :: Replies: 4 :: Views: 1768
I am trying to do the fft on the digital output of SD modulator in matlab.
can anyone tell me how to use the window function in matlab(hamming window) and how to plot the spectrum after this.
I am new to matlab programing.
Thanks a lot
Analog Circuit Design :: 06.03.2009 10:44 :: naisare :: Replies: 2 :: Views: 7933
u can develope some basic encryption and decryption algorithms like RSA, CRC, hamming code for error handling etc. and can develop a crypto syatem.
Digital Signal Processing :: 14.06.2009 01:51 :: hiral.kotak :: Replies: 2 :: Views: 1710
i have sinwave with 0.1 v amplitude and 1khz frequency mixed with 5v white noise.
i used FFT in matlab to simulate.
1-(Study the use of additional mean value calculation of every data set of FFT spectrum and how it affects the visibility of a present signal.). so, how can i use additional mean value???????????
Digital Signal Processing :: 27.09.2009 08:19 :: program2 :: Replies: 0 :: Views: 1356
I am doing a project in speech analysis and would greatly appreciate any help on how to solve the following problem at hand:
Using linear predictive analysis, autocorrelation method, implement a matlab based vocoder for a speech signal (any recorded tape). Use a 20 msec frame step combined with a symmetrically hamming window of 30 mse
PLD, SPLD, GAL, CPLD, FPGA Design :: 23.03.2010 15:16 :: ab2024 :: Replies: 0 :: Views: 1164
I need confirmation check in my project
I used a hamming code structure by using matlab,
hamming(7,4), (15,11), (31,26) Coder
hamming(7,4), (15,11), (31,26) Decoder
I confused with the results @SNR 10 dB (...)
Digital communication :: 30.10.2010 17:49 :: realbaltalyus :: Replies: 3 :: Views: 3044
You have to use windowing function. For example, hamming window to extract frequency of your interest, like 5 Hz in your case.
Digital Signal Processing :: 06.12.2010 02:23 :: Jack// ani :: Replies: 5 :: Views: 1573
I need to compare the(7,4) hamming coded bit error probability with the uncoded bit error probabity and a Q function.
The matlab code which i have compare the theoretial uncoded ber with hamming (7,4) code
N = 10^6 ;% number of bits
Eb_N0_dB = ; % multiple Eb/N0 val
Digital communication :: 13.04.2011 17:57 :: Priya1987 :: Replies: 0 :: Views: 2682
formulas (4)-(5)-(6) gives you the procedure to obtain the coefficients of the FIR filter you need.
You must take into account that array indexes in matlab start from 1 instead of 0 like in the formulas.
matlab has built-in Gamma and Bessel functions, as well as hamming window.
You must have fd, ts and M. And, of course, you must have (...)
Digital Signal Processing :: 24.08.2011 18:52 :: zorro :: Replies: 7 :: Views: 466
e.g a='1000001' and b='1110001' --> dist=hamming(a,b);
one solution is dist = sum(a ~= b);
and other solution is to use pdist Pairwise distance between pairs of objects - matlab
Digital communication :: 06.09.2011 05:16 :: ckshivaram :: Replies: 1 :: Views: 4067
Hello , I'm new to matlab , and I wanna solve an assignment
the question is to generate 4 windows and compute their power spectral, then generate a 4-by-2 plot where the 1st column has windows plots in time domain and the other column for frequency domain ,
i wrote this code but i have few problems, I hope you can help, thanks in advance
Digital Signal Processing :: 08.05.2012 13:02 :: Frogi :: Replies: 0 :: Views: 452
You must to apply some checking code, as hamming, CRC, etc...
Here there are some examples with CRC coding :
Digital communication :: 29.06.2012 20:55 :: andre_teprom :: Replies: 5 :: Views: 788
how can we calculate hamming distance using matlab can anybody tell me please its my project help meeeeee
Digital Signal Processing :: 23.12.2012 05:54 :: farrikhan :: Replies: 3 :: Views: 282
can u please tell me how I can calculate the fir filter coefficient calculation in matlab using frequency sampling method and window method for 16 taps.
Digital Signal Processing :: 07.01.2013 08:31 :: sauj90 :: Replies: 0 :: Views: 390
Obtain and compare the magnitude spectrums of Hanning, hamming and triangular windowed 100 and 110 Hz signals using a 20-ms window for each using matlab.
how can i do that?
i did plot 100 hz signal and made fft and saw the peak on 100 Hz. but how can i apply windows.
please someone help me. i am in deep. :/
Digital Signal Processing :: 08.04.2013 10:24 :: maddoxbey :: Replies: 1 :: Views: 247
Hi, Please i need help with this matlab code.
i am using this melcept function for different samples of me saying the word "one"
here is my code
=wavread('one.wav'); %Read In Sample
i get an output for the different samples of me saying one as 54
Digital Signal Processing :: 09.06.2013 04:41 :: oiyela :: Replies: 0 :: Views: 348
I came across the following problem in FIR design using window and convolution techniques .
Project a FIR filter using a hamming window to achieve the following specifications:
Passband 0,3-3,4 kHz
Stopband 0-0,2 e 4-8 kHz
Stopband atenuation > 25 dB
Sampling frequency 32 kHz
Since the transition band is different , in order to solv
Digital Signal Processing :: 08.10.2005 22:53 :: claudiocamera :: Replies: 0 :: Views: 1074
I am design a 10bits pipeline ADC and by followingprevious articles I use matlab to do FFT. But here are the problems I met.
N=8192(number of data points in FFT),
M=83 (integer number of cycles within the sampling window),
First I used coherent sampling method to do FFT and I got a result, freqd_1.
Analog Circuit Design :: 17.01.2006 04:17 :: yushen_yang :: Replies: 1 :: Views: 1057
The Iterative Solutions Coded Modulation Library (ISCML) is an open source toolbox for simulating capacity approaching codes in matlab.
It has been developed by Matthew Valenti.
It is licensed as free software under the lesser GPL license.
The toolbox contains support for the followi
Software Links :: 18.02.2007 09:15 :: AARTHIREDDY :: Replies: 2 :: Views: 5286
I wish to plot various frequency responses it matlab all on the same plot.
I can plot them individually but not together, can anyone reccomend how to do this.
This is my code:
i wish to plot the same responses but only for different windows. e.g co
Digital Signal Processing :: 25.03.2007 11:49 :: andrew257 :: Replies: 4 :: Views: 631
Hi guys! I have this problem I need to sole as soon as possible.
I'm coding with matlab.
I need to filter a signal saved in a .wav file. I'm reading it using the function wavread and then I create several frames of it through hamming window with an overlap of 50%. At this point I use fft to compute the spectrum of each frame and I make some chan
Digital Signal Processing :: 25.05.2007 13:52 :: pepito82 :: Replies: 1 :: Views: 1996
Try amplitude envelopes, such as hamming weighting. The various weighting functions provide different trade-offs between attenuation of the unwanted frequencies and widening of the spectral peaks.
t = linspace(-5*pi,5*pi,1000);
x1 = cos(2*pi*5*t); x2 = cos(2*pi*10*t); x3 = cos(2*pi*20*t); x4 = cos(2*pi*50*t);
x1 = cos(2*t); x2 = cos(2*pi
Digital Signal Processing :: 07.07.2007 23:21 :: echo47 :: Replies: 8 :: Views: 1055
There are two methods known to me as also mentioned in earlier posts. Just to elaborate them.
1. On cadence
You select the waveform in the waveform window and do the FFT from the calculator available from the analog Design Environment (ADE). The function name is DFT. There you can specify the portion (in time) of the waveform to be
Analog Circuit Design :: 24.09.2007 06:36 :: sankudey :: Replies: 10 :: Views: 2944
hey guys im new here and to matlab and ive got a question-
does anyone have like a sample of the matlab code that i would use to dtermine the correct order of a filter ( we've been given the stopband freq, passband freq ) for a kaiser window and a hamming window . I know that there's a function called kasier_ord.m / (...)
Digital Signal Processing :: 17.10.2007 10:48 :: hustlercreed :: Replies: 3 :: Views: 837
A good project related to communication would be to implement channel coding (hamming codes, convolutional encoder and viterbi decoder) ... source coding techniques ADPCM etc ... modulation techniques on matlab or a DSP processor like TMS320C6713.
Hobby Circuits and Small Projects Problems :: 13.11.2007 00:31 :: abaidullah :: Replies: 7 :: Views: 1742
I have plotted the spectrogram of linear FM signal using TFTB toolbox in matlab. Here is the code:
My questions are:
How to find peak values of the spectrogram for every time instant (when you have mesh plot)?
How to plot a graph for a constant frequency, that will s
Digital Signal Processing :: 04.03.2008 17:28 :: brano :: Replies: 1 :: Views: 788
I have to design filter by using the window method without using 'fwind1' command of the code is:
Hd = ones(21);
r = sqrt(f1.^2 + f2.^2);
Hd((r<0.1)|(r>0.5)) = 0;%the desired bandpass response
Digital Signal Processing :: 21.11.2008 15:32 :: cbecer2003 :: Replies: 1 :: Views: 740
I have one question regarding secure wireless transmission.
I am using 433 MHz RF communication for one of my project. I want to know how can i use error correction code for successful transmission of my data from Computer to Atmega8 (uC).
I am using matlab for data transmission. I can encode the data using the in build encod
RF, Microwave, Antennas and Optics :: 04.04.2009 23:28 :: tarang :: Replies: 0 :: Views: 733
From Digital Signal Processing Fundamentals and Applications
by: Li Tan
Copyright ? 2008, Elsevier Inc. All rights reserved.
Given the sinusoid by using a sampling rate of fs = 8,000 Hz, use the DFT to compute the
spectrum with the following speci
Digital Signal Processing :: 15.06.2009 17:15 :: Aya2002 :: Replies: 4 :: Views: 2730
We have a course project to do the FEC 2/3 of Bluetooth in VHDL/matlab
I can find the syndrome vector after divisions but how I can build a lookup tables of syndromes to be able to correct to error bit.
it is a (15,10) hamming code, which can correct a single bit according to the specification
Digital communication :: 10.11.2009 16:39 :: godsosall :: Replies: 5 :: Views: 2892
I need 100 order coefficients of bandstop filter with specification
FIR window- hamming
order -100 Fs - 1200Hz fc1- 47Hz , fc2 63Hz.
i know this can be easily generated in matlab fdatool , but I dont have matlab, plz help, its urgent -
also the coefficients i need should be in 8 bit unsigned integer.
thanks in (...)
Digital Signal Processing :: 27.07.2010 02:16 :: shhrikant1 :: Replies: 0 :: Views: 782
i need your kind attention and help for my problem
i hav to design FIR filter using genetic algortihm in matlab,kindly help me to design such filter using GAtoolbox or by matlab programming or by C++ programming,in my proposed filter power consumption reduces as hamming distance (signal toggling between bits)is reduced,also mean (...)
Heuristic methods, Machine Learning, AI, and Soft Computing :: 29.12.2010 13:24 :: gagneja :: Replies: 1 :: Views: 1470
I have to do feature extraction by using MFCC for my wav. data. But I am stuck at the beginning:cry: My questions would be silly and I apologize at the beginning for that.
So firstly I want to do frame blocking and then for each frame i will apply hamming window. I dont know about the points....
When I use matlab command, = wa
Digital Signal Processing :: 04.01.2011 21:21 :: sab_sab :: Replies: 0 :: Views: 593
sir,, i am rashmi,, i am doing Mtech project,, i need to design a filter to measure the Total Harmonic Distortion in meters,
so i have selected the FIR filter ,, while designing the FIR filter, how to choose the window function, i mean rect, hamming, hanning, etc,, how to select the accurate one, which method or formula to apply
Digital Signal Processing :: 18.01.2011 01:25 :: rashmi venugopal :: Replies: 3 :: Views: 451
I am doing random vibration and starting with the raw data from either test or finite element modeling.
I am using matlab to process time domain data into the frequency domain. First I want to apply windowing (hamming to start) to the data and then convert to frequency domain.
My data is in table form ie, x, y, z, time. Column 1 is x, col
Digital Signal Processing :: 17.03.2011 17:39 :: chesty :: Replies: 3 :: Views: 931
A linear phase FIR bandpass filter is required to satisfy the following
a) Calculate the number of filter coefficients for each of the following cases:
i) Using the hamming window,
ii) Using the Hanning window,
Digital Signal Processing :: 08.12.2011 15:13 :: ayman_aldabbagh :: Replies: 3 :: Views: 606
I done in matlab a routine to determine to the hamming(7,4,1) code, the amount of syndromes equal to Zero.
You could perform some few changes to fit to your code.
% Program to generate all the input error patterns from 0000000 to 1111111
% and then calculate corresponding syndromes
d = ;
h =[ ; [ 0
Electronic Elementary Questions :: 04.02.2012 20:38 :: andre_teprom :: Replies: 5 :: Views: 458
Sorry about my ignorance, I am trying to learn this subject for a finals project I am undertaking.
I am developing a Speech Recognition algorithm that identifies whether someone is saying a particular word, in this case "Yes" or "No".
I am computing an MFCC (From this paper:
Digital Signal Processing :: 03.12.2012 18:16 :: Phillip+ :: Replies: 1 :: Views: 689