Cognitive Radio Mock Test 1

10%

Question 1 of 10

1. Which of the following is a characteristic to be possessed by a roofing filter?

Fixed bandwidth

Low insertion loss

High insertion loss

High insertion loss and fixed bandwidth

Question 1 of 10

Question 2 of 10

2. Which of the following is the preferred metric when the desired signal bandwidth is less than Nyquist bandwidth?

Spurious Free Dynamic Range (SFDR)

Noise Power Ratio

Half Power Analog Input Bandwidth

Full Power Analog Input Bandwidth

Question 2 of 10

Question 3 of 10

3. Military applications need __________ in addition to mobile subscriber sets.

parted infrastructure

fixed infrastructure

partitioned infrastructure

mobile infrastructure

Question 3 of 10

Question 4 of 10

4. How is bandwidth expressed in a Software Defined Radio?

Ratio of lowest RF to highest RF

Ratio of highest RF to lowest RF

Ratio of median RF to lowest RF

Ratio of lowest RF to median RF

Question 4 of 10

Question 5 of 10

5. What does cost effectiveness mean in terms of military requirements?

Cheap replacement of existing radios

Futuristic design

Fast replacement of existing radios

Backward compatibility

Question 5 of 10

Question 6 of 10

6. ____ fixes the input power dynamic range such that there are no sinusoidal RF conversion artifacts in the output.

SFDR

Harmonics

Two tone intermodulation product

Noise Figure

Question 6 of 10

Question 7 of 10

7. Which of the following is a challenge for direct conversion receiver?

CMOS circuitry

Difference between CMOS and GaAs circuitry

LO leakage and DC bias

GaAs circuitry

Question 7 of 10

Question 8 of 10

8. Which of the following applications takes only SFDR as its performance metric?

Spectrum analysis

Cellular Phone

Wideband digital receiver

Spread spectrum access

Question 8 of 10

Question 9 of 10

9. Which of the following modulation type is incompatible with class C operation?

Frequency modulation

BPSK

QPSK

QAM

Question 9 of 10

Question 10 of 10

10. Human body interaction causes distortions in antenna pattern and health risk in human beings.

False

True

Question 10 of 10