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1

I'm guessing it's used in the following context. Assuming you have a physical source with some of an amplitude distribution in a plane: you can calculate the polar pattern of that source simply as the Fourier Transform of the amplitude distribution as a function of space (not time!). Fourier Beamforming would be the inverse process: you start with the ...


0

In a first analysis, it does not matter where the phase shifting is inserted, as long as the mixing stage is linear. Indeed, shifting a temporal signal is equivalent to multiplying it with a complex number integration the phase shift $\theta$ : Unshifted signal : $s(t)$ $\theta$ phase shifted signal : $s'(t) = s(t).e^{j\theta}$ $f_0$ carrier mixed ...


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