MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
Maximum likelihood estimator at the receiver uses only NLOS signals. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Cognitive ranging protocol may be used as a handshaking mechanism. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Which among the following is a parameter for Cramer-Rao lower bound? |
| A. | Decision theory |
| B. | Bayesian statistics |
| C. | Wald test |
| D. | Fisher information |
| Answer» E. | |
| 4. |
Bat echolocation system _____ on moving close to the target. |
| A. | increases transmitted signal duration |
| B. | increases transmitted signal bandwidth |
| C. | decreases transmitted signal duration |
| D. | decreases transmitted signal bandwidth |
| Answer» D. decreases transmitted signal bandwidth | |
| 5. |
Bat echolocation systems employ ____ modulation. |
| A. | amplitude |
| B. | frequency |
| C. | phase |
| D. | amplitude shift keying |
| Answer» C. phase | |
| 6. |
Self-location awareness offers ____
|
| A. | only relative ranging |
| B. | only non-relative ranging |
| C. | only absolute ranging and non-relative ranging |
| Answer» C. only absolute ranging and non-relative ranging | |
| 7. |
The closed loop feedback exists ____ |
| A. | between transmitter and environment |
| B. | between receiver and environment |
| C. | between transmitter and receiver |
| D. | among transmitter, environment, and receiver |
| Answer» E. | |
| 8. |
____ may be used in passive self-location awareness approach. |
| A. | Cognitive sonar |
| B. | Image sensor |
| C. | Infrared sensor |
| D. | Hall sensor |
| Answer» C. Infrared sensor | |
| 9. |
In ____ approach, transmitter and receiver are co-located. |
| A. | active self-location awareness |
| B. | passive self-location awareness |
| C. | active cooperative location awareness |
| D. | passive cooperative location awareness |
| Answer» B. passive self-location awareness | |
| 10. |
What is the minimum number of radios required for cooperative location awareness? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |
| 11. |
____ is the first step in cognitive ranging protocol. |
| A. | Ranging parameter set up |
| B. | Angle of arrival set up |
| C. | Line of sight determination |
| D. | Meteorological determination |
| Answer» B. Angle of arrival set up | |
| 12. |
In cooperative location awareness, the transmitter and the receiver are ____ |
| A. | nottime reliant |
| B. | not duplex |
| C. | not co-located |
| D. | not active |
| Answer» D. not active | |
| 13. |
In ____ approach, the distance between two cognitive radios is found by estimating ____ information. |
| A. | cooperative location awareness, triangulation |
| B. | cooperative location awareness, ranging |
| C. | composite location awareness, triangulation |
| D. | composite location awareness, time of flight |
| Answer» C. composite location awareness, triangulation | |