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 decision over heterogeneous spectrum band with different characteristics is a challenge in spectrum management. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
What is the full form of CE-OFDM? |
| A. | Closed Envelope Orthogonal Frequency Division Multiplexing |
| B. | Constant Envelope Orthogonal Frequency Division Multiplexing |
| C. | Constant Evolute Orthogonal Frequency Division Multiplexing |
| D. | Closed Evolute Orthogonal Frequency Division Multiplexing |
| Answer» C. Constant Evolute Orthogonal Frequency Division Multiplexing | |
| 3. |
Which among the following is not a disadvantage of using OFDM? |
| A. | Complex computation is necessary |
| B. | Sensitive to frequency offset |
| C. | High peak to average power ratio |
| D. | Low data rate |
| Answer» B. Sensitive to frequency offset | |
| 4. |
Which among the following replaces the static sine pulses of OFDM to improve flexibility? |
| A. | Wavelet bases |
| B. | Triangular pulses |
| C. | Impulse bases |
| D. | Ramp pulses |
| Answer» B. Triangular pulses | |
| 5. |
Which among the following is not an advantage of avoiding contiguous spectrum bands for transmission? |
| A. | Low delay |
| B. | Low power consumption |
| C. | Low interference |
| D. | Mitigation of quality of service degradation |
| Answer» E. | |
| 6. |
Which among the following is not a requirement for multiple spectrum band transmission by xG user? |
| A. | Spectrum holes |
| B. | Compatibility with internal policies |
| C. | Contiguous spectrum band |
| D. | Compatibility with quality of service |
| Answer» D. Compatibility with quality of service | |
| 7. |
Which among the following is a challenge for spectrum decision models? |
| A. | Combining multiple characterization parameters |
| B. | Supporting OFDM networks |
| C. | Supporting multiple spectrum bands |
| D. | Maintaining a decision model for each characterization parameter |
| Answer» B. Supporting OFDM networks | |
| 8. |
Which among the following is not a challenge for spectrum management? |
| A. | Interference avoidance |
| B. | Quality of service awareness |
| C. | Seamless communication |
| D. | Interference temperature measurement |
| Answer» E. | |
| 9. |
Which among the following is not selected in accordance with the user requirement? |
| A. | Interference |
| B. | Data rate |
| C. | Tolerable error rate |
| D. | Transmission mode |
| Answer» B. Data rate | |
| 10. |
Which among the following an expression for spectrum capacity in OFDM based xG networks? refers to a set of unused spectrum units, G(f) is the channel power gain at frequency f, S0 is the signal power per unit frequency and N_0is the noise power per unit frequency. |
| A. | C= <sub> </sub> ( frac{1}{2} )log<sub>2</sub>(1+ ( frac{G(f)S_0}{N_0}) ) |
| B. | C= <sub> </sub> ( frac{1}{2} )log<sub>2</sub>(1+ ( frac{S_0}{N_0}) ) |
| C. | C= <sub> </sub>B log<sub>2</sub>(1+ ( frac{G(f)S_0}{N_0}) ) |
| D. | C= <sub> </sub>B log<sub>2</sub>(1+ ( frac{G(f)N_0}{S_0}) ) |
| Answer» B. C= <sub> </sub> ( frac{1}{2} )log<sub>2</sub>(1+ ( frac{S_0}{N_0}) ) | |
| 11. |
Which among the following is the expression for channel capacity as per Shannon-Hartley theorem?B is bandwidth, N is the average noise power, and S is the average received signal power. |
| A. | C=B+log<sub>2</sub>(1+ ( frac{N}{S}) ) |
| B. | C=B+log<sub>2</sub>(1+ ( frac{S}{N}) ) |
| C. | C=B log<sub>2</sub>(1+ ( frac{N}{S}) ) |
| D. | C=B log<sub>2</sub>(1+ ( frac{S}{N}) ) |
| Answer» E. | |