NPTEL 5G Wireless Standard Design Week 3 Assignment Answers 2024

Last updated: 2024/08/08 at 5:43 PM

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NPTEL 5G Wireless Standard Design Week 3 Assignment Answers 2024

1. In PDSCH, what is the resultant bit sequence after performing Interleaving on bit sequence 100101011110 when QPSK is used for modulation

100110110110
011110100101
100101110110
011110101001

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2. Identify the functionality below from section 5.2 of 38.211 document from 3GPP Release 15 and name the block in which this functionality is used

Rate matching
LDPC Encoding
Scrambling
Interleaving

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3. If a user is assigned 24 PRBs over a slot for PDSCH and with 16 QAM Modulation. When the transport block size is 8986 then calculate the value of G

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4. If a user is assigned 24 PRBs over a slot for PDSCH and with 16 QAM Modulation. When the transport block size is 8986 then calculate the size of rate matched code block

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5. Pick the Correct Order in which we perform 5G NR processing on data from left to right for PDSCH during transmission

LDPC coding, Scrambling, Modulation, Interleaving
Rate matching, LDPC coding, CRC addition, Modulation
Segmentation, LDPC coding, Rate matching, Interleaving
CRC addition, Segmentation, Rate matching, LDPC coding

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6. If 150 PRBs are allocated over 14 OFDM symbols to transmit a PDSCH with transport block size of 32,984 bits using 64-QAM modulation. Calculate the circular buffer length for each code block if the LDPC encoder is using base graph 1. Refer lifting size table below for Z_c calculation.

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7. If 150 PRBs are allocated over 14 OFDM symbols to transmit a PDSCH with transport block size of 32,984 bits using 64-QAM modulation. Calculate the RV index for the 3rd retransmission if the LDPC encoder is using base graph 1. Refer lifting size table above for Z_c calculation.

Answer :-

8. If 150 PRBs are allocated over 14 OFDM symbols to transmit a PDSCH with transport block size of 32,984 bits using 64-QAM modulation. Calculate the effective code rate if the LDPC encoder is using base graph 1. Refer lifting size table above for Z_c calculation.

Answer :-

9. Calculate the minimum number of PRBs per symbol MAC scheduler should allocate for PDSCH transmission over 14 OFDM symbols using base graph 1 LDPC coding where transport block size is 40896 and MCS index is 14 .

Note: Refer to the MCS table from module 2 in week 1.