Electrical Engineering > GATE 2022 > Fourier Series
The discrete time Fourier series representation of a signal x[n] with period N is written as x[n] = Σk=0N-1 akej(2knπ/N). A discrete time periodic signal with period N=3, has the non-zero Fourier series coefficients: a-3=2 and a4=1. The signal is
A
2+2e-(j2πn/6)cos(2πn/6)
B
1+2e(j2πn/6)cos(2πn/6)
C
1+2e(j2πn/3)cos(2πn/6)
D
2+2e(j2πn/6)cos(2πn/6)

Correct : b

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