How can I get an analog signal by inputting irregular samples and using the delta sigma method (1-bit DAC)?

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nonet21 2017-11-2

关闭： MATLAB Answer Bot 2021-8-20

I have already used the zero order hold way to rebuild an analog signal, but with irregular samples i don't know use it.

close all; clc; % Zero order holder: %http://www.ece.iastate.edu/~namrata/EE424/l1.pdf % http://control.ucsd.edu/mauricio/courses/mae143a/lectures/8sampling.pdf

M=2.1234567654; % Nb de points par période de la sinusoide : M>2 (condition de Shannon)

% Time domain tStart = 0; tStep = 0.01; tEnd = 200; t = tStart:tStep:tEnd;

% Original signal x = @(t)(sin(2*pi*t/M));

% Sampling period Ts = 5e-2;

% Impulse ZOH zohImpl = ones(1,Ts/tStep);

% Samples nSamples = tEnd/Ts; samples = 0:nSamples;

% Sampled signal xSampled = zeros(1,length(t)); xSampled(1:Ts/tStep:end) = x(samples*Ts);

% Convolution with impulse response xZoh1 = conv(zohImpl,xSampled);

xZoh1 = xZoh1(1:length(t));

% Plot figure(4); hold all; plot(t,x(t)); stem(t,xSampled); plot(t,xZoh1);

And i would like to use Delta sigma method to recreate my signal with irregular samples.

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