ISRO Electronics & Communication (ECE) 2011 - Question 69

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Topic: Signals and Systems

The impulse response of a linear time invariant system is $h(n)=\{1,\underline{2},1,-1\}$. The response for the input signal $x(n)=\{1,2,3,1\}$ is

  • A. {1, 8, 4, 8, 3, -1, 2}
  • B. {1, 4, 8, 3, 8, -2, -2}
  • C. {1, 4, 8, 8, 3, -2, -1}
  • D. {1, 8, 3, 8, 8, 4, -1}

Answer: C. {1, 4, 8, 8, 3, -2, -1}

Explanation: Using convolution sum method (matrix/tabular multiplication), $x(n)*h(n)=\{1,4,8,8,3,-2,-1\}$.

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