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Find the Phase: 1D

The questions below are due on Friday December 03, 2021; 05:00:00 PM.
 
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The signals shown in the left column are periodic in n with period N=20. The functions shown in the right column show the angles of Fourier series. For each signal, indicate which (if any) of the angle plots represents the angles of that signal's Fourier series coefficients (where an "X" indicates an undefined phase).

 

Which angle plot matches with each signal? Enter a sequence of letters in the box below. For example, entering GDIC... would imply that angle graph G matches with signal 1, angle graph D matches with signal 2, I with signal 3, C with signal 4, ...

Matching letters: