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== Introduction == | == Introduction == | ||
− | |Consider a CT cosine signal (a pure frequency), and sample that signal with a rate above or below Nuquist rate. In this slecture, I will talk about how does the discrete-time Fourier transform of the sampling of this signal look like. Suppose | + | {|Consider a CT cosine signal (a pure frequency), and sample that signal with a rate above or below Nuquist rate. In this slecture, I will talk about how does the discrete-time Fourier transform of the sampling of this signal look like. Suppose |
− | the cosine signal is <math>x(t)=cos(2pi*440t)</math>. | + | the cosine signal is <math>x(t)=cos(2pi*440t)</math>. } |
== Sampling rate above Nyquist rate == | == Sampling rate above Nyquist rate == | ||
Revision as of 12:15, 27 September 2014
Discrete-time Fourier transform (DTFT) of a sampled cosine
A slecture by ECE student Yijun Han
Partly based on the ECE438 Fall 2014 lecture material of Prof. Mireille Boutin.
Contents
outline
- Introduction
- Sampling rate above Nyquist rate
- Sampling rate below Nyquist rate
- Conclusion
- References