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Signals-and-systems Questions Set 20:

Quiz Mode

Determine the periodicity of the given time signal (in seconds):

X(t) = sin πt + cos 5πt

1 s

2 s

3 s

4 s

Solution:

The signal x(n) = u(n + 4) - u(n - 4) is ____________________.

causal

non-causal

none of the above

anti-causal

Solution:

How is the impulse response of a stable, continuous-time system?

Absolutely integrable

Definite integral

Indefinite integral

All of the above

Solution:

For what values of p will the system y(t) = (p² - 5p + 6)e^t + cos(t) + 4 be stable?

The system can never be stable

p = 2, 3

p = -2, 3

p = -2, -3

Solution:

What is the derivative of a parabolic function P(t) with respect to time t?

None of the above

Ramp function (r(t))

Unit step function (u(t))

Delta function (δ(t))

Solution:

When a signal is multiplied by a value α (alpha), and |α| > 1, the resulting signal undergoes what type of transformation?

Time Expansion

Amplification

Time Compression

Reduction

Solution:

What is the average power of the signal x(t) = { 1 ; 0 <= t <= T/2

{ -1 ; T/2 <= t <= T

0 W

1 W

2 W

3 W

Solution:

To match a transmission line and load over a range of frequencies, the best method is:

to use a balun

to use a single stub of adjustable position

to use a double stub

to use a broad band amplifier

Solution:

An amplifier with resistive negative feedback has two left half-plane poles in its open-loop transfer function. The amplifier:

will always be unstable at high frequencies

will be stable for all frequencies

may be unstable, depending on the feedback factor

will oscillate at low frequencies

Solution:

A DS spread spectrum system transmits at a rate of 1 kbps in the presence of a tone jammer. The jammer power is 20 dB greater than the desired signal, and the required Eb/N0 to achieve satisfactory performance is 10 dB. The corresponding probability of error is

4.9*10^-3

6.3*10^-3

9.4*10^-3

8.3*10^-3

Signals-and-systems Questions Set 20:

Determine the periodicity of the given time signal (in seconds):

X(t) = sin πt + cos 5πt

Solution:

The signal x(n) = u(n + 4) - u(n - 4) is ____________________.

Solution:

How is the impulse response of a stable, continuous-time system?

Solution:

For what values of p will the system y(t) = (p² - 5p + 6)e^t + cos(t) + 4 be stable?

Solution:

What is the derivative of a parabolic function P(t) with respect to time t?

Solution:

When a signal is multiplied by a value α (alpha), and |α| > 1, the resulting signal undergoes what type of transformation?

Solution:

What is the average power of the signal x(t) = { 1 ; 0 <= t <= T/2

{ -1 ; T/2 <= t <= T

Solution:

To match a transmission line and load over a range of frequencies, the best method is:

Solution:

An amplifier with resistive negative feedback has two left half-plane poles in its open-loop transfer function. The amplifier:

Solution:

A DS spread spectrum system transmits at a rate of 1 kbps in the presence of a tone jammer. The jammer power is 20 dB greater than the desired signal, and the required Eb/N0 to achieve satisfactory performance is 10 dB. The corresponding probability of error is

Solution:

Related Question Sets:

Related Topics:

Signals-and-systems Questions Set 20:

Determine the periodicity of the given time signal (in seconds): X(t) = sin πt + cos 5πt

Solution:

The signal x(n) = u(n + 4) - u(n - 4) is ____________________.

Solution:

How is the impulse response of a stable, continuous-time system?

Solution:

For what values of p will the system y(t) = (p2 - 5p + 6)et + cos(t) + 4 be stable?

Solution:

What is the derivative of a parabolic function P(t) with respect to time t?

Solution:

When a signal is multiplied by a value α (alpha), and |α| > 1, the resulting signal undergoes what type of transformation?

Solution:

What is the average power of the signal x(t) = { 1 ; 0 <= t <= T/2 { -1 ; T/2 <= t <= T

Solution:

To match a transmission line and load over a range of frequencies, the best method is:

Solution:

An amplifier with resistive negative feedback has two left half-plane poles in its open-loop transfer function. The amplifier:

Solution:

A DS spread spectrum system transmits at a rate of 1 kbps in the presence of a tone jammer. The jammer power is 20 dB greater than the desired signal, and the required Eb/N0 to achieve satisfactory performance is 10 dB. The corresponding probability of error is

Solution:

Related Question Sets:

Related Topics:

Determine the periodicity of the given time signal (in seconds):

X(t) = sin πt + cos 5πt

For what values of p will the system y(t) = (p² - 5p + 6)e^t + cos(t) + 4 be stable?

What is the average power of the signal x(t) = { 1 ; 0 <= t <= T/2

{ -1 ; T/2 <= t <= T