Matlab

4FSK
hii all, can anybody help me in implementing 4FSK modulation and demodulation? If you could give me some references atleast,it would be great.... thanks ... 13 Aug 2010 10:17

4FSK
hii all, can anybody help me in implementing 4FSK modulation and demodulation? If you could give me some references atleast,it would be great.... thanks ... 13 Aug 2010 07:02

RMS calculation in frequency domain after windowing
Hi, my first question in here.. So I know I can calculate RMS in frequency domain as derived from Parseval's Theorem. See for example Wikipedia: http://en.wikipedia.org/wiki/Root_mean_square#RMS_in_frequency_domain But what if I have applied a windowing function before doing the fft? In my case a Hann window. Now... 13 Aug 2010 11:23

How to 'detect' zeros between two non-zeros numbers ?
Hi everyone, I'm trying to build an algorithm so that i could know if in any vector there is a zero (or many) between 2 non-zeros numbers. For example : x=[0 0 0 0 1 2 3 0 0 4 0 0 0] How could i know that there is 2 zeros between 3 and 4 ? The zeros at the beginning and the end don't interest me. Any sugg... 13 Aug 2010 11:23

slow drawing on figure with many GUI elements
Hello I created two GUIs with GUIDE. They contain: GUI1: 1 Axis GUI2: 1 Axis and 50 other elements such as buttons, sliders etc... In both cases, I render a 3d object onto the axis and rotate it manually with cameratoolbar('setmode','orbit'). GUI2 is much slower compared to GUI1. While I get around 25fps for GU... 13 Aug 2010 05:57

Reading mouse position while the mouse is moving in GUI
I found it out! The property must be defined right after plotting the image. Hope this helps someone who is struggling with the same problem. ... 13 Aug 2010 03:49

can anyone help me with my code?
snr=100; beta=10; Qe1=2*snr*rand(0,1000);Qea=2*snr*rand(0,1000); Qi1=2*snr*rand(0,1000);Qia=2*snr*rand(0,1000); Qe1=2*snr-Qea-Qi1-Qia; a=(beta^2)*Qe1/(1+(beta^2)*Qi1); b=(beta^2)*Qea/(1+(beta^2)*Qia); alpha=1; c=(sqrt(Qe1)+alpha*sqrt(Qea)).^2; d=1+Qi1+(alpha^2)*Qia; e=c/d; if {min(... 13 Aug 2010 03:49

there is something wrong somewhere in my matlab code
clear all; close all disp('Generate 0.02-second sinewave of 100 Hz and Vp=5'); fs = 8000; %sampling rate T = 1/fs; %sampling interval t = 0:T:0.02; sig = 4.5*sin(2*pi*100*t); bits = input('input number of bits=>'); lg = length(sig); for x = 1:lg [Index(x)pq] = biquant(bits,-5,5,sig(x)); %Output the quantiz... 13 Aug 2010 03:49

Matlab does'nt work anymore
After power failure Matlab doesn't work. Reinstalation did not help What mean folowing error which I receive after matlab start? Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException at java.lang.System.arraycopy(Native Method) at com.mathworks.widgets.text.mcode.MLintUtils.conv... 13 Aug 2010 07:02

cumsum/cumtrapz
Hii All, I want to frequency modulate a digital signal.In the code given to me,i found a statement. int_m=cumsum(signal)./fs; and the frequency modulation is implemented using basic equation of FM. s=cos(2 pi fc t+ 2 pi fd int_m)+ j sin(2 pi fc t+2 pi fd int_m) My question is if we do integration of signal u... 13 Aug 2010 02:46