MCQOPTIONS
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MCQOPTIONS
This section includes 27 Mcqs, each offering curated multiple-choice questions to sharpen your Wireless Mobile Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In maximal ratio combining, the output SNR is equal to __________ |
| A. | Mean of all individual SNRs |
| B. | Maximum of all SNRs |
| C. | Sum of individual SNR |
| D. | Minimum of all SNRs |
| Answer» D. Minimum of all SNRs | |
| 2. |
Time diversity repeatedly transmits information at time spacings that exceed ___________ |
| A. | Coherence bandwidth |
| B. | Dwell time |
| C. | Run time |
| D. | Coherence time |
| Answer» E. | |
| 3. |
Frequency diversity is good for low traffic conditions. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Frequency diversity uses ________ as a diversity element. |
| A. | Correlation coefficient |
| B. | Coherence time |
| C. | Coherence bandwidth |
| D. | SNR |
| Answer» D. SNR | |
| 5. |
Frequency diversity is implemented by transmitting information on more than one ___________ |
| A. | Carrier frequency |
| B. | Amplitude |
| C. | Phase |
| D. | Modulation scheme |
| Answer» B. Amplitude | |
| 6. |
Which of the factor does not determine the correlation coefficient? |
| A. | Polarization angle |
| B. | Cross polarization discrimination |
| C. | Offset angle from the main beam direction |
| D. | Coherence time |
| Answer» E. | |
| 7. |
Polarization diversity uses the ________ as the diversity element. |
| A. | Modulation index |
| B. | Carrier frequency |
| C. | Reflection coefficient |
| D. | Coherence time |
| Answer» D. Coherence time | |
| 8. |
In selection diversity, the gain of each diversity branch provides different SNR. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
____________ is used to prevent deep fade for rapidly varying channel. |
| A. | Modulation |
| B. | Demodulation |
| C. | Macroscopic diversity technique |
| D. | Microscopic diversity technique |
| Answer» E. | |
| 10. |
Small scale fades are characterized by ____________ amplitude fluctuations. |
| A. | Large |
| B. | Small |
| C. | Rapid |
| D. | Slow |
| Answer» D. Slow | |
| 11. |
Diversity decisions are made by ____________ |
| A. | Receiver |
| B. | Transmitter |
| C. | Channel |
| D. | Adaptive algorithms |
| Answer» B. Transmitter | |
| 12. |
Diversity requires a training sequence. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
WHICH_OF_THE_FACTOR_DOES_NOT_DETERMINE_THE_CORRELATION_COEFFICIENT??$ |
| A. | Polarization angle |
| B. | Cross polarization discrimination |
| C. | Offset angle from the main beam direction |
| D. | Coherence time |
| Answer» E. | |
| 14. |
POLARIZATION_DIVERSITY_USES_THE__________AS_THE_DIVERSITY_ELEMENT.?$ |
| A. | Modulation index |
| B. | Carrier frequency |
| C. | Reflection coefficient |
| D. | Coherence time |
| Answer» D. Coherence time | |
| 15. |
Frequency diversity uses ________ as a diversity element.$ |
| A. | Correlation coefficient |
| B. | Coherence time |
| C. | Coherence bandwidth |
| D. | SNR |
| Answer» D. SNR | |
| 16. |
Frequency diversity is implemented by transmitting information on more than one _____$ |
| A. | Carrier frequency |
| B. | Amplitude |
| C. | Phase |
| D. | Modulation scheme |
| Answer» B. Amplitude | |
| 17. |
In maximal ratio combining, the output SNR is equal to _______ |
| A. | Mean of all individual SNRs |
| B. | Maximum of all SNRs |
| C. | Sum of individual SNR |
| D. | Minimum of all SNRs |
| Answer» D. Minimum of all SNRs | |
| 18. |
Time diversity repeatedly transmits information at time spacings that exceed _____ |
| A. | Coherence bandwidth |
| B. | Dwell time |
| C. | Run time |
| D. | Coherence time |
| Answer» E. | |
| 19. |
Frequency diversity is good for low traffic condition. State whether True or False. |
| A. | True |
| B. | False |
| Answer» C. | |
| 20. |
In selection diversity, the gain of each diversity branch provides different SNR. State whether True or False? |
| A. | True |
| B. | False |
| Answer» C. | |
| 21. |
Which of the following is not a category of space diversity technique? |
| A. | Selection diversity |
| B. | Time diversity |
| C. | Feedback diversity |
| D. | Equal gain diversity |
| Answer» C. Feedback diversity | |
| 22. |
Space diversity s also known as ________ |
| A. | Antenna diversity |
| B. | Time diversity |
| C. | Frequency diversity |
| D. | Polarization diversity |
| Answer» B. Time diversity | |
| 23. |
Large scale fading can be mitigated with the help of _________ |
| A. | Modulation |
| B. | Demodulation |
| C. | Macroscopic diversity technique |
| D. | Microscopic diversity technique |
| Answer» D. Microscopic diversity technique | |
| 24. |
______ is used to prevent deep fade for rapidly varying channel. |
| A. | Modulation |
| B. | Demodulation |
| C. | Macroscopic diversity technique |
| D. | Microscopic diversity technique |
| Answer» E. | |
| 25. |
Small scale fades are characterized by _____ amplitude fluctuations. |
| A. | Large |
| B. | Small |
| C. | Rapid |
| D. | Slow |
| Answer» C. Rapid | |
| 26. |
Diversity decisions are made by ______ |
| A. | Receiver |
| B. | Transmitter |
| C. | Channel |
| D. | Adaptive algorithms |
| Answer» B. Transmitter | |
| 27. |
Diversity requires training sequence. State whether True or False. |
| A. | True |
| B. | False |
| Answer» C. | |