NPTEL 5G Wireless Standard Design Week 4 Assignment Answers 2024

NPTEL 5G Wireless Standard Design Week 4 Assignment Answers 2024

1.

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2. Find the new threshold value in question 1 if the transmitter is transmitting using BPSK symbol such that 0 is mapped to 0 and 1 is mapped to 1 with rest of the parameters remaining same.

• 0
• -1/2
• 1/3
• -1/6
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3. State true or false for the following question:
The scrambiling sequence will affect the LLR values which will be fed to the soft-decoder.

• False
• True
`Answer :- `

4. Consider a user for which 125 PRBs is allocated across 12 OFDM symbols. Calculate the total number of RE’s available for the user to transmit the PDSCH.

Note: Reserve the desired number of subcarriers for pilots (as taught in the class).

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5. If the user uses a 64-QAM modulation with the code rate of 600/1000 calculate the number of intermediate information bits available to the user across 3 layers. Give NInfo/100 as the final answer.

`Answer :- `

6. If the user is allocated entire 14 symbols with rest of the conditions unchanged calculate the gain in number of RE’s that the user will get to transmit the PDSCH.

• 10%
• 13.04%
• 17.39%
• 20%
`Answer :- `

7. The low pass filter is used in the base band processing at the receiver to.

• to remove the effect of noise
• to obtain the transmitted IQ samples
• to nullify the effect of carrier frequency offset
• to estimate the channel
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8.

`Answer :- `

9. What is the purpose of using the pass band filter at the receiver while recovering the base band signal?

• to supress the effect of the carrier frequency offset across pass band
• to supress the effect of the carrier phase offset inside pass band
• to limit the pass band noise
• to increase the gain of the system in the required band
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