Questions tagged [frequency-translation]

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6
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4answers
668 views

What are the units of the product of two signals?

In a standard mixer, we multiply two signals $x_1(t)$ and $x_2(t)$, each with units of volts $(V)$, and get at the output: $$y(t)=x_1(t)\,\cdot\,x_2(t)$$ I have always thought that the output of ...
1
vote
1answer
288 views

Frequency Translation by Band

Are there any mathematical transforms which can offset a select band of frequencies across the spectrum? (For sampled digital audio) (crappy illustration)
1
vote
1answer
298 views

Fourier Transform frequency translation property in practical applications

From the material of my Signal Analysis and Processing course: The frequency translation property is extremely important for practical applications. It allows taking a signal from a portion of ...
0
votes
1answer
430 views

frequency translation or pitch shifting through linear interpolation in frequency domain

I want to perform pitch shifting with the method described in NEW PHASE-VOCODER TECHNIQUES FOR PITCH-SHIFTING, HARMONIZING AND OTHER EXOTIC EFFECTS. Basically, it involves: Locate the spectral peaks ...
1
vote
1answer
506 views

Translation property of 2-D discrete Fourier transform

I am studying the 2-D discrete Fourier transform related to image processing and I don't understand a step about the translation property. In the book Digital Image Processing (Rafael C. Gonzalez, ...
2
votes
1answer
307 views

Reordering frequency translation and decimation

I'm trying to understand the behavior of two different methods of decimating and frequency translating a signal. At this point, I'm only swapping the translation and decimation; I'm not doing any ...