MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. |
Spectrum decisions are affected by the co-location of data transmission and sensing function. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Which among the following is not a disadvantage of the interference detection method? |
| A. | Requirement of modulation of unlicensed signal |
| B. | Requirement of the activity level of licensed and unlicensed users |
| C. | Management of interference at the receiver |
| D. | Disregard for the effect of multiple xG users |
| Answer» D. Disregard for the effect of multiple xG users | |
| 3. |
What is an interference temperature model? |
| A. | Interference temperature model is constructed by using the cumulative RF energy from multiple transmissions |
| B. | Interference temperature model is constructed by using the RF energy from a single transmission |
| C. | Interference temperature model is constructed by using the sampling RF energy from periodic transmissions |
| D. | Interference temperature model is constructed by using the sampling IF energy from periodic transmissions |
| Answer» B. Interference temperature model is constructed by using the RF energy from a single transmission | |
| 4. |
Which among the following is not a disadvantage of cooperation detection? |
| A. | Overhead traffic |
| B. | Receiver uncertainty |
| C. | Shadowing uncertainty |
| D. | Additional storage |
| Answer» D. Additional storage | |
| 5. |
Which among the following is an interference of interest in xG architecture? |
| A. | Expected interference at primary user |
| B. | Expected interference at xG user |
| C. | Expected interference at channel |
| D. | Expected interference at spectrum broker |
| Answer» B. Expected interference at xG user | |
| 6. |
What is the terminology used when xG base-station is involved in gathering sensing information? |
| A. | Cumulative |
| B. | Centralized |
| C. | Distributed |
| D. | Aggregated |
| Answer» C. Distributed | |
| 7. |
Which among the following are problems of transmitter detection? |
| A. | Secondary user uncertainty and xG base station uncertainty |
| B. | xG base station uncertainty and primary base station uncertainty |
| C. | Receiver uncertainty and shadowing uncertainty |
| D. | Transmitter uncertainty and receiver uncertainty |
| Answer» E. | |
| 8. |
Which among the following is a factor of concern for in-band sensing? |
| A. | Identification of stop period for the search process |
| B. | Identification of the start period for the search process |
| C. | Selection of spectrum for evaluation |
| D. | Selection of duration for transmission |
| Answer» E. | |
| 9. |
What is the purpose of out-of-band sensing? |
| A. | Fast switching |
| B. | Fast routing |
| C. | Fast discovery |
| D. | Fast handoff |
| Answer» D. Fast handoff | |
| 10. |
Which among the following is not an advantage of using cyclostationary feature detection? |
| A. | Better performance than energy detection |
| B. | Does not require prior knowledge of the signal transmitted by the primary user |
| C. | Robust noise performance |
| D. | Rapid attainment of high processing gain |
| Answer» E. | |
| 11. |
Which among the following is achieved by coupling a modulated signal with a sine wave carrier? |
| A. | Causality |
| B. | Periodicity |
| C. | Linearity |
| D. | Stability |
| Answer» C. Linearity | |