MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which code requires minimum Eb/N0? |
| A. | Orthogonal |
| B. | Biorthogonal |
| C. | Simplex |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 2. |
Transorthogonal code is obtained by |
| A. | Deleting last digit of each orthogonal codeword |
| B. | Deleting first digit of each orthogonal codeword |
| C. | Doubling each digit of orthogonal codeword |
| D. | Taking negative of each digit of orthogonal codeword |
| Answer» C. Doubling each digit of orthogonal codeword | |
| 3. |
Biorthogonal codes needs ________ bandwidth as orthogonal codes. |
| A. | Equal |
| B. | Double |
| C. | Half |
| D. | Triple |
| Answer» D. Triple | |
| 4. |
Which codes perform better? |
| A. | Orthogonal |
| B. | Biorthogonal |
| C. | Orthogonal & Biorthogonal |
| D. | None of the mentioned |
| Answer» C. Orthogonal & Biorthogonal | |
| 5. |
The smaller the cross correlation, the ______ is the distance between the signal vectors. |
| A. | More |
| B. | Less |
| C. | Double |
| D. | Half |
| Answer» B. Less | |
| 6. |
In non orthogonal signalling as k increases there is |
| A. | Degraded error performance |
| B. | Improved bandwidth efficiency |
| C. | Increase in required Eb/N0 |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
Biorthogonal set consists of |
| A. | Orthogonal signals |
| B. | Antipodal signals |
| C. | Combination of orthogonal and antipodal |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 8. |
The smaller the cross correlation, the ______ is the distance between the signal vectors? |
| A. | More |
| B. | Less |
| C. | Double |
| D. | Half |
| Answer» B. Less | |
| 9. |
In orthogonal signal, all cross correlation coefficients are |
| A. | One |
| B. | Zero |
| C. | Negative |
| D. | None of the mentioned |
| Answer» C. Negative | |
| 10. |
In orthogonal signalling as k increase there is |
| A. | Improved error performance |
| B. | Degraded error performance |
| C. | Improved bandwidth |
| D. | None of the mentioned |
| Answer» B. Degraded error performance | |
| 11. |
Orthogonal vectors are |
| A. | Perpendicular to each other |
| B. | Their dot product must be zero |
| C. | One signal cannot interfere with the other |
| D. | All of the mentioned |
| Answer» E. | |
| 12. |
Antipodal signals are |
| A. | Mirror images |
| B. | 1800 apart |
| C. | One is negative of the other |
| D. | All of the mentioned |
| Answer» E. | |
| 13. |
Examples of structured sequences are |
| A. | Block codes |
| B. | Convolutional codes |
| C. | Turbo codes |
| D. | All of the mentioned |
| Answer» E. | |
| 14. |
Channel coding relates to area such as |
| A. | Waveform coding |
| B. | Structured sequence |
| C. | Waveform coding & Structured sequence |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |