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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);
colormap(bone.^4); ylim();

PC Programming and Interfacing :: 13.03.2005 11:27 :: echo47 :: Replies: **18** :: Views: **8595**

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: **1792**

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: **16844**

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**');
psd(Hs,xn,'Fs',fs,'NFFT',1024,'SpectrumType','twoside')
= psd(Hs,xn,'Fs',fs,'SpectrumType','onesided');
Pow = (fs/(2*length(Pxxo)))

Digital Signal Processing :: 15.10.2005 11:38 :: neoflash :: Replies: **3** :: Views: **791**

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: **31895**

hi all,
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
ws1=0.3*pi
wp1=0.4*pi;
wp2=0.5*pi;
ws2=0.6*pi;
tr_width=min((wp1-ws1),(ws2-wp2));
M=ceil(6.6*pi/tr_width)+1
n=;
wc1=(w

Digital Signal Processing :: 20.03.2006 03:28 :: scdoro :: Replies: **4** :: Views: **1807**

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: **1886**

Hi all,
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: **8093**

hi,
u can develope some basic encryption and decryption algorithms like RSA, CRC, **hamming** code for error handling etc. and can develop a crypto syatem.
Thanks..
HAK..

Digital Signal Processing :: 14.06.2009 01:51 :: hiral.kotak :: Replies: **2** :: Views: **1781**

Help please!!!!
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???????????
2-W

Digital Signal Processing :: 27.09.2009 08:19 :: program2 :: Replies: **0** :: Views: **1451**

I am doing a project in speech analysis and would greatly appreciate any help on how to solve the following problem at hand:
Problem a.
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: **1211**

Hi Everybody,
I need confirmation check in my project
I used a **hamming** code structure by using **matlab**,
the scenario
random data
**hamming**(7,4), (15,11), (31,26) Coder
qpsk modulator
awgn channel
qpsk demodulator
**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: **3183**

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: **1656**

Hello
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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
clear
N = 10^6 ;% number of bits
Eb_N0_dB = ; % multiple Eb/N0 val

Digital communication :: 13.04.2011 17:57 :: Priya1987 :: Replies: **0** :: Views: **2847**

Hi,
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: **512**

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: **4433**

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: **500**

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: **867**

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: **326**

hi,
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: **493**

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: **300**

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
a=0.95;
aaaa1=filter(,1,aaaaa1);
aaa1= melcepst(aaaa1,fs);
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: **435**

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: **1102**

Hi all,
I am design a 10bits pipeline ADC and by followingprevious articles I use **matlab** to do FFT. But here are the problems I met.
fin=100Khz, fs=10Mhz,
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.
Then I

Analog Circuit Design :: 17.01.2006 04:17 :: yushen_yang :: Replies: **1** :: Views: **1102**

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: **5288**

Hi All
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:
b=fir1(n,wn,rectwin(n+1),'noscale');
=freqz(b,a,512);
plot(w/pi,(abs(h);
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: **671**

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: **2118**

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: **1092**

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: **3041**

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: **865**

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: **1777**

I have plotted the spectrogram of linear FM signal using TFTB toolbox in **matlab**. Here is the code:
y=fmlin(128,0.1,0.3);
h=tftb_window(21,'**hamming**');
tfrsp(y,1:128,128,h,1);
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: **828**

Hi everyone;
I have to design filter by using the window method without using 'fwind1' command of the code is:
%-----------------------------------------------------------------------------
= freqspace(21,'meshgrid');
Hd = ones(21);
r = sqrt(f1.^2 + f2.^2);
Hd((r<0.1)|(r>0.5)) = 0;%the desired bandpass response
colormap(

Digital Signal Processing :: 21.11.2008 15:32 :: cbecer2003 :: Replies: **1** :: Views: **780**

Hello folks,
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: **776**

From Digital Signal Processing Fundamentals and Applications
by: Li Tan
Copyright ? 2008, Elsevier Inc. All rights reserved.
page 116
Example 4.11.
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: **2814**

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: **2996**

Hello All,
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: **808**

hi
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: **1518**

Hi all,
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: **632**

Fir Filter **hamming** In **matlab** ebook download in PDF format
FIR Digital Filter Design Applet: Notes refer this it is simple and it answers your question

Digital Signal Processing :: 18.01.2011 06:12 :: ckshivaram :: Replies: **3** :: Views: **484**

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: **979**

A linear phase FIR bandpass filter is required to satisfy the following
specifications:
Passband=8-12kHz
Stopband ripple=0.001
Passband ripple=0.01
Transition width=3kHz
Sampling frequency=48kHz
a) Calculate the number of filter coefficients for each of the following cases:
i) Using the **hamming** window,
ii) Using the Hanning window,
iii) U

Digital Signal Processing :: 08.12.2011 15:13 :: ayman_aldabbagh :: Replies: **3** :: Views: **663**

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: **516**

Hello,
Sorry about my ignorance, I am trying to learn this subject for a finals project I am undertaking.
Brief background:
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: **827**

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