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1. |
If x(n)=xR(n)+jxI(n) is a complex sequence whose Fourier transform is given as X(ω)=XR(ω)+jXI(ω), then what is the value of XR(ω)? |
A. | \(\sum_{n=0}^∞\)xR (n)cosωn-xI (n)sinωn |
B. | \(\sum_{n=0}^∞\)xR (n)cosωn+xI (n)sinωn |
C. | \(\sum_{n=-∞}^∞\)xR (n)cosωn+xI (n)sinωn |
D. | \(\sum_{n=-∞}^∞\)xR (n)cosωn-xI (n)sinωn |
Answer» D. \(\sum_{n=-∞}^∞\)xR (n)cosωn-xI (n)sinωn | |