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Revision as of 11:08, 7 November 2008
Chapter 7
In chapter 7 we're going to learn how to represent a CT sgnal using samples.
Sampling
What is it? Sampling is a process of measuring a CT signal x(t) at some specific values of time t.
For example we can sample a continuous time signal x(t) at point t-1, t-2 and t-3. The sampled signal can represented by the formula $ y[n] = x(nT)\, $
The loss of information while sampling occurs depends on the signal and the frequency of the sample.
Given $ y[n] = x(nT)\, $, it is impossible to recontruct the signal back, since ther is loss of information when converting into a DT signal, but one can approximate it.
