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- 1. Multiple Choice
Which of the following sequence of symbols provides time diversity when sending symbols A, B, C, D, E, F, G, H... over a fading channel?
A, B, C, D, E, F, G, H...
A, A, B, B, C, C, D, D, E, E, F, F, G, G, H, H...
- 2. Multiple Choice
Which of the following sequence of symbols provides the most time diversity when sending symbols A, B, C, D, E, F, G, H... over a fading channel?
A, B, C, D, E, F, G, H...
A, A, B, B, C, C, D, D, E, E, F, F, G, G, H, H...
A, A, A, B, B, B, C, C, C, D, D, D, E, E, E, F, F, F, G, G, G, H, H, H...
- 3. Multiple Choice
Which of the following sequence of symbols provides the most time diversity when sending symbols A, B, C, D, E, F, G, H... over a fading channel?
A, B, C, D, E, F, G, H...
A, A, B, B, C, C, D, D, E, E, F, F, G, G, H, H...
A, B, A, B, C, D, C, D, E, F, E, F, G, H, G, H,...
A, B, C, D, E, F, G, H, A, B, C, D, E, F, G, H,...
- 4. Multiple Choice
For achieving time diversity with repetition coding which of the following operations is performed at the receiver
Energy detector
Phase detector
Maximal Ratio Combining
Rake receiver
- 5. Multiple Choice
Assuming that channel gains across slots are independent, how does probability of error scale when using repetition coding and sending symbol sequence as follows:
A, A, A, B, B, B, C, C, C, D, D, D, E, E, E, F, F, F, G, G, G, H, H, H...
SNR-1
SNR-2
SNR-3
SNR-4
- 6. Multiple Choice
Assuming that channel gains across slots are independent, how does probability of error scale when using repetition coding and sending symbol sequence as follows:
A, B, C, D, E, F, G, H, A, B, C, D, E, F, G, H,...
SNR-1
SNR-2
SNR-3
SNR-4
- 7. Multiple Choice
Which of the following is a deep-fade event when using repetition coding with MRC at receiver?
||h|| is "small"
For any l, |hl| is "small"
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