NPTEL 5G Wireless Standard Design Week 2 Assignment Answers 2024
1. Calculate the number of slots per frame in a 5G NR system with 120 kHz subcarrier spacing
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2. Select the Protocol layer responsible for Coding and Modulation in 5G NR
- Packet Data Convergence Protocol ( PDCP )
- Radio-Link Control ( RLC )
- Medium-Access Control ( MAC )
- Physical Layer ( PHY )
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3. Calculate CRC for a 16-bit transport block 1101011100101110 with a generator polynomial D4+D3+1
- 0001
- 01011
- 1100
- 11000
Answer :-
4. Consider a 5G NR system with 100MHz bandwidth and subcarrier spacing of 30kHz. A user is allocated a transport block size of 14010 bits. Consider the LDPC Encoder with base graph 1. Refer to the lifting sizes table and calculate the following
The code block size for the transport block
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5. Calculate the number of filler bits per code block for the TB given in Q4
Answer :-
6. Calculate the lifting size for the TB given in Q4
Answer :-
7. Calculate the LDPC encoder output length for the TB given in Q4
Answer :-
8. Calculate the number of code blocks required for the TB given in Q4
Answer :-
9. Calculate the value of Kb when the code rate of the LDPC encoder is 1/5 in case of base graph 2
Answer :-
10. What is the best approach to maintain a link when UE experiences a sudden drop in SNR
- Increase code rate
- Increase transport block CRC length
- Decrease code rate
- Modify the CRC polynomial with same degree as before
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