ecen4763.notes.36

ecen4763.notes.36 - N = 3 Multiply Inverse 13 Summary of...

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1 ECEN 4763: Introduction to Digital Signal Processing Fall 2009 Lecture 36: Wednesday, November 11, 2009 Discrete Fourier Transform, Part V 1. More advantages of zero-padding 2. Time-domain aliasing 3. Using the DFT to estimate the CTFT
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2 Discrete Fourier Transform, Part V 1. More advantages of zero-padding 2. Time-domain aliasing 3. Using the DFT to estimate the CTFT
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4 ? Fewer samples in frequency Discrete Fourier Transform, Part V 1. More advantages of zero-padding 2. Time-domain aliasing 3. Using the DFT to estimate the CTFT
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10 Length N = 5 Length N = 3 DFT Length N = 3 DFT Length
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Unformatted text preview: N = 3 Multiply Inverse DFT 11 12 13 Summary of Time-Domain Aliasing 1. Undersampling in frequency gives rise to aliasing in the time domain • Overlap of replicas of the signal 2. Time-domain aliasing is the reason why multiplying DFTs leads to circular convolution in time 3. But, time-domain aliasing can be used if you just want to analyze your signal at a coarser frequency spacing 14 Discrete Fourier Transform, Part V 1. More advantages of zero-padding 2. Time-domain aliasing 3. Using the DFT to estimate the CTFT 15 16...
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ecen4763.notes.36 - N = 3 Multiply Inverse 13 Summary of...

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