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The signal cos(10πt + π⁄4) is ideally sampled at a sampling frequency of 15 Hz. The sampled signal is passed through a filter with impulse response (sin(πt)⁄πt)cos(40πt − π⁄2). The filter output is
A
15⁄2cos(40πt − π⁄4)
B
15⁄2(sin(πt)⁄πt)cos(10πt + π⁄4)
C
15⁄2cos(10πt − π⁄4)
D
15⁄2(sin(πt)⁄πt)cos(40πt − π⁄2)

Correct : c

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signal processing EC GATE 2015 sampling signal ideal sampling filter response cosine signal sine wave impulse response filter output EC GATE EC 2015 signal processing EC questions

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