NPTEL 5G Wireless Standard Design Week 5 Assignment Answers 2024

1. gNB needs to transmit DCI Format 1-0 with only following fields, then provide the length of DCI bits
Note : Refer 7.3 section, 38.212 Release-15 3GPP document for DCI related information
(i) Identifier for DCI format
(ii) New data Indicator
(iii) HARQ process number
(iv) PUCCH resource indicator
(v) Redundancy version
(vi) Modulation and coding scheme

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2. Select DCI types that contains resource information related to PDSCH

Format 0-0
Format 1-0
Format 0-1
Format 1-1

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3. Consider CRC bit sequence 110010101001010111000101 for a DCI and RNTI value is 28425. Calculate scrambled CRC bits.

100100001111001010110110
000001010011001111001010
110010101111101011001100
110010101100110010100000

Answer :-

4. Maximum number of blind decoding attempts can be made by UE for DCI detection in a 5G NR system with 120kHz subcarrier spacing

Answer :-

5. Perform CRC Interleaving on bit sequence 101100110110010110101100100000000101 and provide the output bits. Refer Mother interleaver pattern provided in Module 25.

001101111001001110101100100000000101
001100110111001110101100100000000101
001100110110001011001110101100100000
110001011001001100110110101100100000

Answer :-

6. Select the correct statements about Polar Encoding on downlink control information

Mother code rate length could be ≥ 512
code rate of polar encoder should be ≥1/8
Mother code rate length should be > length of DCI
Mother code rate length should be ≤ 512

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7. Provide Type-0 frequency domain resource allocation when following Resource Block Groups are to be allocated for downlink in a Bandwidth part (BWP). Consider total number of RBGs present in the bandwidth part (BWP) are 13.
RBG Index set – {1,3,4,7,9,10,12}