MCQOPTIONS
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MCQOPTIONS
| 1. |
If x(n)=cosω0n and W(ω) is the Fourier transform of the rectangular signal w(n), then what is the Fourier transform of the signal x(n).w(n)?$ |
| A. | 1/2[W(ω-ω<sub>0</sub>)- W(ω+ω<sub>0</sub>)]. |
| B. | 1/2[W(ω-ω<sub>0</sub>)+ W(ω+ω<sub>0</sub>)]. |
| C. | [W(ω-ω<sub>0</sub>)+ W(ω+ω<sub>0</sub>)]. |
| D. | [W(ω-ω<sub>0</sub>)- W(ω+ω<sub>0</sub>)]. |
| Answer» C. [W(‚âà√¨‚àö¬¢-‚âà√¨‚àö¬¢<sub>0</sub>)+ W(‚âà√¨‚àö¬¢+‚âà√¨‚àö¬¢<sub>0</sub>)]. | |