MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Software Defined Radio knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Maximum likelihood techniques formulate the likelihood ratio for a sequence of channel symbols. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Multibeam antenna technology is more complex than null-forming. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Decoded Channel Bits Interface is defined between ____ functional block and ____ functional block. |
| A. | antenna, RF/IF |
| B. | RF/IF, modem |
| C. | modem, INFOSEC |
| D. | INFOSEC, bitstream |
| Answer» D. INFOSEC, bitstream | |
| 4. |
In_____, the highest-power signal is demodulated to estimate its bitstream. |
| A. | maximum likelihood |
| B. | sequential interference cancellation |
| C. | least mean square |
| D. | recursive least square |
| Answer» C. least mean square | |
| 5. |
____ technique exploits lack of coherence between desired signal and interference. |
| A. | Multibeam arrays |
| B. | Adaptive spatial nulling |
| C. | Beamforming |
| D. | Space-time adaptive processing |
| Answer» E. | |
| 6. |
____ is a method used for calculating beamforming weights. |
| A. | Sample matrix inversion |
| B. | Indirect matrix inversion |
| C. | Convolution |
| D. | Correlation |
| Answer» B. Indirect matrix inversion | |
| 7. |
In ____, the interference has difference placement on the long-code. |
| A. | GSM |
| B. | AMPS |
| C. | CDMA |
| D. | FDMA |
| Answer» D. FDMA | |
| 8. |
In space-time adaptive processing, _____ and equalization parameters are calculated _____ |
| A. | diversity, jointly |
| B. | diversity, independently |
| C. | beamforming, jointly |
| D. | beamforming, independently |
| Answer» D. beamforming, independently | |
| 9. |
Which of the following statements is false regarding the spatial distribution of a wavefront? |
| A. | Multipath components are collinear with direct path |
| B. | Multipath components have less signal strength than direct path |
| C. | Multipath components are present |
| D. | Multipath components exhibit time delay |
| Answer» B. Multipath components have less signal strength than direct path | |
| 10. |
_____ process determines delay azimuth parameters. |
| A. | Stationary |
| B. | Auto correlation |
| C. | Cross correlation |
| D. | Convolution |
| Answer» D. Convolution | |
| 11. |
In the context of smart antenna, SAT stands for _____ |
| A. | Scholastic Assessment Test |
| B. | Site Acceptance Test |
| C. | Saturation |
| D. | Supervisory Audio Tones |
| Answer» E. | |
| 12. |
Spatial nulling subsystem replaces three element sectors of conventional base station with ____ disposed antenna elements. |
| A. | four spherically |
| B. | eight spherically |
| C. | four circularly |
| D. | eight circularly |
| Answer» E. | |
| 13. |
Interference with adjoining sectorized antennas can be avoided by _____ |
| A. | frequency nulling |
| B. | spatial nulling |
| C. | spatial beam-forming |
| D. | frequency beam-forming |
| Answer» C. spatial beam-forming | |
| 14. |
If a multibeam array has ____, it may not be feasible to assign a complete frequency-reuse plan to each beam. |
| A. | a single beam |
| B. | two beams |
| C. | less than five beams |
| D. | more than ten beams |
| Answer» E. | |
| 15. |
Smart antenna integrates the contributions of _____ antenna elements. |
| A. | band distributed |
| B. | band centralized |
| C. | spatially distributed |
| D. | spatially centralized |
| Answer» D. spatially centralized | |