Ch3.2 Discrete Fourier Transform
Ch3.2 Discrete Fourier Transform
Ch3.2 Discrete Fourier Transform
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Circular Convolution: DFT Method<br />
• Example – Determine the 4-point circular convolution of two length-<br />
4 sequences: 1 2 0 1 and 2 2 1 1 as sketched<br />
below<br />
• The 4-point DFT and are given by<br />
4, 1 , 2, 1 and 6, 1 , 0, 1 .<br />
• Thus, the 4-point DFT of is given by<br />
24, 2, 0, 2.<br />
• A 4-point IDFT of yields<br />
6 7 6 5 .<br />
Elec3100 Chapter 3<br />
24
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