List of top Electronics and Communication Engineering Questions on Signals and Systems asked in AP PGECET

The convolution of two DT sequence is,
\( x(n) = \{1 \uparrow, 2, 0, 1\} \)
\( h(n) = \{2, 2, 3\} \)

Consider a causal LTI system with frequency response \( H(j\omega) = \frac{1{j\omega + 3} \). This system produces the output to an input \( x(t) \) as \( y(t) = e^{-3t}u(t) - e^{-4t}u(t) \). The input \( x(t) \) is

A system is described by the differential equation \( \frac{d^2y(t){dt^2} + 6\frac{dy(t)}{dt} + 5y(t) = x(t) \). Impulse response of the system is

Find the convolution sum of sequences \(x_1[n] = \{1, 2, 3\}\) and \(x_2[n] = \{2, 1, 4\}\).

Which of the following systems is memoryless?

Find the ROC of \(x(t) = e^{-2t u(t) + e^{-3t} u(t)\).

For a WSS random process, the autocorrelation $R_x(\tau)$ as $\tau \rightarrow \infty$ approaches:

The total average power of a signal equals:

In a causal and stable LTI system, the impulse response $h(t)$ must satisfy which condition ?

Signal distortionless transmission through an LTI system requires: