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I have attached the frequency spectra of FSK and PSK.can some one please explain why these figures look different, why is it that the peaks are formed only for FSK modulated signal and not for PSK signal.
can some one explain to me why are there M peaks when I plot the fft of a FSK modulated signal, following is the matlab code
M = 4; freqsep = 8; nsamp = 8; Fs = 32;
x = randint(1000,1,M); % Random signal
y = fskmod(x,M,freqsep,nsamp,Fs); % Modulate.
ly = length(y);
% Create an FFT plot...
I have a matrix X = [a, b ,c ; d ,e ,f; h, i ,j] and the values
a,b,c,d,e,f,g,h,i,j are not pre known. but i need to find out if they hold the same value, ie if a=b=c=d=e=f=h=g etc.
well, basically i am trying to modulate it,
[X, Fs, nbits] = wavread('filename');
M=16;
modulated_sig=qammod(X,M);
but it keeps giving me an error saying
??? Error using ==> qammod at 39
Elements of input X must be integers in the range [0, M-1].
i know that the points from a constellation diagram can be found from:
h = scatterplot(rand(16,2));
h = get(h,'Children');
h = get(h,'Children');
x = get(h,'xdata');
y = get(h,'ydata');
but is there a way to extract ONLY the points that come up on the const. Diagram ?
t = 0:.001:2*pi; % Times at which to sample the sine function
sig = sin(2*t); % Original signal, a sine wave
partition = [-1:2/15:1]; % Length 16, to represent 17 intervals
codebook = [0:1:16]; % Length 17, one entry for each interval
quants= quantiz(sig,partition,codebook); % Quantize...
given a scatterplot(yy)
is there a way to extract the in-phase and quad components, ie(the x and y
components) of the constellation points and output it as a matrix
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