MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
Minimum shift keying experiences phase discontinuities. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Gaussian minimum shift keying is based on frequency shift keying. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Which among the following is a simple expression of throughput objective? |
| A. | R<sub>th</sub>=kR<sub>s</sub> where R<sub>s</sub> is symbol rate |
| B. | R<sub>th</sub>=kR<sub>b</sub> where R<sub>b</sub> is bit rate |
| C. | R<sub>th</sub>=R<sub>s</sub>R<sub>b</sub> where R<sub>s</sub> is symbol rate and R<sub>b</sub> is bit rate |
| D. | R<sub>th</sub>=R<sub>s</sub>/R<sub>b</sub> where R<sub>s</sub> is symbol rate and R<sub>b</sub> is bit rate |
| Answer» B. R<sub>th</sub>=kR<sub>b</sub> where R<sub>b</sub> is bit rate | |
| 4. |
Which among the following is an objective that influences throughput? |
| A. | Bit error rate |
| B. | Bandwidth |
| C. | Spectral efficiency |
| D. | Signal to interference ratio |
| Answer» B. Bandwidth | |
| 5. |
____ is a measure of good information received. |
| A. | Latency |
| B. | Data rate |
| C. | Bit rate |
| D. | Throughput |
| Answer» E. | |
| 6. |
Signal to interference plus noise ratio is defined as ____ |
| A. | ratio of noise power to interference power |
| B. | ratio of signal power to sum of noise and interference power |
| C. | ratio of sum of noise and interference power to signal power |
| D. | ratio of interference to noise power |
| Answer» C. ratio of sum of noise and interference power to signal power | |
| 7. |
Signal to interference plus noise ratio gives ____ |
| A. | lower bound on channel capacity |
| B. | upper bound on channel capacity |
| C. | upper bound on receiver capacity |
| D. | lower bound on channel capacity |
| Answer» C. upper bound on receiver capacity | |
| 8. |
The aim of interference objective is ____ |
| A. | to determine compatibility of waveform and frequency |
| B. | to determine compatibility of waveform and radio environment |
| C. | to compare channels |
| D. | to compare signals |
| Answer» E. | |
| 9. |
The modification of a signal due to extraneous power exhibited by a signal from a nearby channel is called ____ |
| A. | co-channel interference |
| B. | adjacent channel interference |
| C. | inter-symbol interference |
| D. | inter-carrier interference |
| Answer» C. inter-symbol interference | |
| 10. |
Which among the following is an expression for spectral efficiency? |
| A. | = ( frac{R_sk}{B} ). where R<sub>s</sub> is the symbol rate, B is the bandwidth, K is the number of bits per symbol |
| B. | =R<sub>sB</sub> where R<sub>s</sub> is the symbol rate, B is the bandwidth, K is the number of bits per symbol |
| C. | = ( frac{Bk}{R_s} )where R<sub>s</sub> is the symbol rate, B is the bandwidth, K is the number of bits per symbol |
| D. | =BK where B is the bandwidth |
| Answer» B. =R<sub>sB</sub> where R<sub>s</sub> is the symbol rate, B is the bandwidth, K is the number of bits per symbol | |
| 11. |
The minimisation of bandwidth causes ____ |
| A. | low symbol rate |
| B. | high symbol rate |
| C. | high power |
| D. | low power |
| Answer» B. high symbol rate | |
| 12. |
Spectral efficiency may be expressed in terms of ____ |
| A. | Hertz |
| B. | bits per second |
| C. | Hertz per bit per second |
| D. | bits per Hertz per second. |
| Answer» D. bits per Hertz per second. | |
| 13. |
____ filter is required to form ____ filter. |
| A. | Two raised cosine filter, one sinc filter |
| B. | Two raised sinc filter, one raised cosine filter |
| C. | Two root raised cosine filter, one raised cosine filter |
| D. | Two raised cosine filter, one root raised cosine filter |
| Answer» D. Two raised cosine filter, one root raised cosine filter | |
| 14. |
____ is used to reduce inter-symbol interference. |
| A. | Root raised cosine filter |
| B. | Sinc filter |
| C. | Root raised sinc filter |
| D. | Cosine filter |
| Answer» B. Sinc filter | |
| 15. |
Which among the following is an objective not dependent on bandwidth? |
| A. | Bit error rate |
| B. | Interference power |
| C. | Throughput |
| D. | Power |
| Answer» E. | |