MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Cognitive Radio knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the detection technique employed in the following diagram? |
| A. | Matching filter detection |
| B. | Cooperation detection |
| C. | Energy detection |
| D. | Cyclostationary detection |
| Answer» E. | |
| 2. |
Sensing control is implemented in the physical layer of the OSI model. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Which among the following are factors of significance in the energy detection technique? |
| A. | Probability of detection and probability of exception |
| B. | Probability of detection and probability of false alarm |
| C. | Probability of detection and probability of useful information |
| D. | Probability of false alarm and probability of useful information |
| Answer» C. Probability of detection and probability of useful information | |
| 4. |
Which among the following is not an operational unit in energy detection? |
| A. | Integrator |
| B. | Squaring unit |
| C. | Correlator |
| D. | Threshold device |
| Answer» D. Threshold device | |
| 5. |
What is the advantage of using matched filter detection? |
| A. | Rapid increase in processing gain |
| B. | Simultaneous detection |
| C. | High accuracy |
| D. | Low power consumption |
| Answer» B. Simultaneous detection | |
| 6. |
Which among the following techniques requires prior knowledge of the primary signal? |
| A. | Matched filter detection |
| B. | Energy detection |
| C. | Cooperation detection |
| D. | Cyclostationary detection |
| Answer» B. Energy detection | |
| 7. |
What is the terminology used to represent the absence of a licensed user in the spectrum? |
| A. | Grounded hypothesis |
| B. | Fixed hypothesis |
| C. | Null hypothesis |
| D. | Zero hypothesis |
| Answer» D. Zero hypothesis | |
| 8. |
Which among the following is not a transmission detection technique? |
| A. | Matched filter detection |
| B. | Energy detection |
| C. | Cyclostationary detection |
| D. | Interference based detection |
| Answer» E. | |
| 9. |
Which among the following is the most practical method to identify spectrum holes? |
| A. | Detect primary user transmission |
| B. | Detect primary user receiving information |
| C. | Detect secondary user transmission |
| D. | Detect secondary user receiving information |
| Answer» B. Detect primary user receiving information | |
| 10. |
Why is cooperation required in spectrum sensing? |
| A. | Elimination of base-station |
| B. | Elimination of xG users |
| C. | Interference avoidance |
| D. | Improvement of sensing accuracy |
| Answer» E. | |
| 11. |
What is the purpose of in-band sensing? |
| A. | Interference avoidance |
| B. | Sharing spectrum information |
| C. | Sharing spectrum resources |
| D. | Spectrum handoff |
| Answer» B. Sharing spectrum information | |
| 12. |
Which among the following is the function of out-of-band sensing? |
| A. | Detect primary base-station |
| B. | Detect spectrum holes |
| C. | Detect primary user |
| D. | Detect xG users |
| Answer» C. Detect primary user | |