How to plot quantized signal in MATLAB?

During the process of analog to digital conversion Some time it is needed to plot quantized signal

Which command(s) can be used for plotting a quantized signal?

Answer 1

[Mathieu NOE]

hello

this little code snipset to illustrate what is sampling

quantization is simply to round the y values to the nearest 2^(n-1) value, (n = nb of bits of the ADC)

%Time Base
Fs = 1000;
dt = 1/Fs;

t = 0:dt:1.8;
samples = length(t);

%Sine Frequencies
Fn1 = 1;
Fn2 = 6;
signal = sin(2*pi*Fn1*t) + 0.25*sin(2*pi*Fn2*t);

% decimated signal for tem plot
decim = 50; % decimation factor
ind = (1:decim:samples);
t2 = t(ind);
x2 = signal(ind);

%Second Part
h = stem(t2, x2, 'linewidth', 2);
hold
plot(t, signal, 'linewidth', 2)
lgd = legend('Discrete Data', 'Continuous Data');
set (lgd, "fontsize", 12)
set(gca,'XTick',[0:0.2:1.8]);
set(gca,'YTick',[-2:0.5:2]);
title('Time vs Magnitude','fontweight','bold','fontsize',16);
xlabel('Time(s)','fontweight','bold','fontsize',14)
ylabel('Magnitude','fontweight','bold','fontsize',14)
grid