Signal Processing - Study Mode

[#146] Which one of the following systems is a causal system?
Correct Answer

(B) y(t) = u(t) + u(t - 1)

[#147] The impulse response h[n] of a linear time-invariant system is given by h[n] = u[n + 3] + u[n - 2] - 2u[n - 7] where u[n] is the unit step sequence. The above system is
Correct Answer

(B) stable but not causal

[#148] If z 0 is a zero of a (real-valued) linear-phase FIR filter then following is/are also zero/zeros of a (real-valued) linear-phase FIR filter,
Correct Answer

(C) $$frac{1}{{{{ ext{z}}_0}}},,{ ext{z}}_0^ * { ext{ and }}frac{1}{{{ ext{z}}_0^ * }}$$

[#149] A non zero DC signal pass through a low pass filter then output is
Correct Answer

(C) Same as input

[#150] It is possible to compute the cross-correlation R xy (τ) between two signals x(t) and y(t) directly from their convolution provided
Correct Answer

(D) y(t) has even symmetry