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Tag: Discrete Fourier Transform (DFT)

Discrete Fourier Transform (DFT) of a DFT-even sequence
July 11, 2022 DSP

The Beauty of Symmetry in Fourier Transform

In 1978, Fred Harris was a relatively unknown faculty member at the San Diego State University when he published his

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A complex number
May 2, 2021 DSP

Convolution and Fourier Transform

One question I am frequently asked is regarding the definition of Fourier Transform. A continuous-time Fourier Transform for time domain

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Spectrum of a sinusoid
July 12, 2021 DSP

Generating Signals and Viewing the Spectrum

One of the most common questions DSP beginners have is how to generate the signals (particularly, sinusoids) and view their

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A bank of N filters each centered at discrete frequency k/N
March 19, 2020 DSP

Discrete Fourier Transform (DFT) as a Filter Bank

We have discussed before what a Discrete Fourier Transform (DFT) is and how to find the DFT of some commonly

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Symbolic representation of linear phase rotation that changes with frequency index
May 14, 2019 DSP

Effect of Time Shift in Frequency Domain

Children usually ask questions like “How many hours have passed?” And they have no idea about the start time to

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