MCQOPTIONS
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MCQOPTIONS
This section includes 19 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 fast frequency hopping, hopping rate is less than the information symbol rate. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
FH systems do not have collisions. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
The processing gain of FH systems is given by ratio of _______ |
| A. | Hopping bandwidth and hopping period |
| B. | Instantaneous bandwidth and hopping duration |
| C. | 3 dB bandwidth and bit rate |
| D. | Total hopping bandwidth and instantaneous bandwidth |
| Answer» E. | |
| 4. |
The bandwidth of the channel used in the hopset is called _________ |
| A. | Hopping bandwidth |
| B. | Total hopping bandwidth |
| C. | Instantaneous bandwidth |
| D. | 3 dB bandwidth |
| Answer» D. 3 dB bandwidth | |
| 5. |
What is the set of possible carrier frequencies in FH-SS? |
| A. | Hopset |
| B. | Hop |
| C. | Chips |
| D. | Symbols |
| Answer» B. Hop | |
| 6. |
Frequency hopping involves a periodic change of transmission _______ |
| A. | Signal |
| B. | Frequency |
| C. | Phase |
| D. | Amplitude |
| Answer» C. Phase | |
| 7. |
PN sequence can be generated using sequential logic circuits. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
THE_BANDWIDTH_OF_THE_CHANNEL_USED_IN_THE_HOPSET_IS_CALLED__________?$ |
| A. | Hopping bandwidth |
| B. | Total hopping bandwidth |
| C. | Instantaneous bandwidth |
| D. | 3 dB bandwidth |
| Answer» D. 3 dB bandwidth | |
| 9. |
WHAT_IS_THE_SET_OF_POSSIBLE_CARRIER_FREQUENCIES_IN_FH-SS??$ |
| A. | Hopset |
| B. | Hop |
| C. | Chips |
| D. | Symbols |
| Answer» B. Hop | |
| 10. |
FH systems do not have collisions. State whether True or False.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
The processing gain of FH systems is given by ratio of _______$ |
| A. | Hopping bandwidth and hopping period |
| B. | Instantaneous bandwidth and hopping duration |
| C. | 3 dB bandwidth and bit rate |
| D. | Total hopping bandwidth and instantaneous bandwidth |
| Answer» E. | |
| 12. |
In fast frequency hopping, hopping rate is less than the information symbol rate. State whether True or False. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
Frequency hopping involves a periodic change of transmission ______? |
| A. | Signal |
| B. | Frequency |
| C. | Phase |
| D. | Amplitude |
| Answer» C. Phase | |
| 14. |
DSSS system spreads the baseband signal by ________ the baseband pulses with a pseudo noise sequence. |
| A. | Adding |
| B. | Subtracting |
| C. | Multiplying |
| D. | Dividing |
| Answer» D. Dividing | |
| 15. |
The period of a PN sequence produced by a linear m stage shift register cannot exceed _____ symbols. |
| A. | 2m |
| B. | m |
| C. | 2m |
| D. | 2m-1 |
| Answer» E. | |
| 16. |
Which of the following is not a characteristic of PN sequence? |
| A. | Nearly equal number of 0s and1s |
| B. | Low correlation between shifted version of sequence |
| C. | Non deterministic |
| D. | Low cross-correlation between any two sequences |
| Answer» D. Low cross-correlation between any two sequences | |
| 17. |
Which of the following is not a property of spread spectrum techniques? |
| A. | Interference rejection capability |
| B. | Multipath fading |
| C. | Frequency planning elimination |
| D. | Multiple user, multiple access interface |
| Answer» C. Frequency planning elimination | |
| 18. |
Why spread spectrum technique is inefficient for a single user? |
| A. | Large transmission bandwidth |
| B. | Small transmission bandwidth |
| C. | Fixed transmission bandwidth |
| D. | Fixed null bandwidth |
| Answer» B. Small transmission bandwidth | |
| 19. |
The transmission bandwidth of spread spectrum techniques is equal to the minimum required signal bandwidth. |
| A. | True |
| B. | False |
| Answer» C. | |