Cognitive Radio Practice Test 8

1. xG networks allow usage of spectrum band without a fixed infrastructure.

True

False

2. What term should replace the labels ‘A’ and ‘B’?

Spectrum access, Spectrum sensing

Spectrum access, Spectrum allocation

Spectrum management, Spectrum access

Spectrum management, Spectrum sensing

3. What is reactive handoff?

Primary user performs sensing and sensing is performed before the triggering event

xG user performs sensing and sensing is performed after triggering event

xG user performs sensing and sensing is performed before the triggering event

Primary user performs sensing and sensing is performed after triggering event

4. Which among the following is true about centralized spectrum sharing?

Centralized spectrum sharing has a controlling entity for spectrum allocation and spectrum access

Centralized spectrum sharing does not rely on fixed infrastructure units

Centralized spectrum sharing reduces the overhead of communication

Centralized spectrum sharing holds each node responsible for spectrum allocation

5. Prediction of availability of channels can mitigate sensing delay.

True

False

6. What is the terminology used for a handoff between spectrum bands without changing the current base station?

Inter-cell/inter-pool handoff

Intra-cell/Intra-pool handoff

Intra-cell/inter-pool handoff

Inter-cell/Intra-pool handoff

7. Spectrum decision over heterogeneous spectrum band with different characteristics is a challenge in spectrum management.

True

False

8. Which among the following method is represented in the following diagram?

Hybrid handoff

Reactive handoff

Non-handoff

Proactive handoff

9. Which among the following statements is false about the outcome of increasing transmission power?

Transmission range at lower frequencies is maintained

Transmission range at higher frequencies is maintained

Path loss is increased

Interference is increased

10. Which among the following is achieved by coupling a modulated signal with a sine wave carrier?

Causality

Linearity

Stability

Periodicity