Cognitive Radio Practice Test 9

1. Which unit is responsible for initiating local coordination?

Intermediary node

Central entity

Primary user

Secondary user

2. Which among the following issues consider cost as a route metric?

Overhead

Best path selection

Link failure

Spectrum knowledge

3. Which among the following is a problem addressed by CSIS?

Challenges in negotiating international spectrum agreements

Construction of flexible spectrum management infrastructure

Lack of common spectrum testing techniques

Shortage of short range plans

4. Which among the following outcome occur on increasing the energy per bit exponentially as per Shannon limit?

Radiated spectral energy increases at the second power of the spectral information density

Spectral information density increases at the third power of the radiated spectral energy

Radiated spectral energy increases at the third power of the spectral information density

Spectral information density increases at the second power of the radiated spectral energy

5. Which among the following would result in increased out-of-band rejection at receivers while broadcasting?

Periodic transmissions

Frequency reuse

Increased transmission power

Close band spacing between stations

6. A key depletion attack is a malicious attack on the network layer.

True

False

7. Which among the following is accomplished by sampling sub-Nyquist in wideband FFT spectrum sensing?

Shorter time delay

Reduction of complexity

Improved signal detection

Reduced power consumption

8. Which among the following phenomenon considers the operation of other users of the spectrum?

Spectrum efficiency

Spectrum reuse

Channel capacity

Signal energy

9. Which among the following configuration include the private land mobile radio?

Fixed transmitter, mobile receiver

Fixed transmitter, fixed receiver

Mobile transmitter, fixed receiver

Mobile transmitter, mobile receiver

10. Which among the following may be implemented to reduce the amount of assumption about interference?

Developing multiple signal propagation models

Installing multiple resource managers

Installing multiple sensors to observe the same transmission

Developing multiple channel models