NPTEL 5G Wireless Standard Design Week 11 Assignment Answers 2024
1. Select the invalid CSI-RS configurations
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2. Calculate the value of Mlayersymb for a single codeword with 1728 modulated symbols in rank 3 transmission
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3. Consider UE with single antenna and follows below given codebook. Provide the PMI that UE feedbacks to gNB when observed channel matrix at UE is given as H=[−1.2+0.5j0.7−0.3j]
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4. Select the possible number of layers during downlink transmission of single codeword
- 3
- 6
- 8
- 1
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5. Select the correct order of PDSCH processing in UE
- LDPC Coding, Layer Mapping, IFFT, Resource Block mapping, CP addition
- Modulation, Layer Mapping, Precoding, Resource Block mapping,IFFT
- CP removal,FFT, Resource block demapping, MIMO receiver, Layer demapping
- CP removal,FFT, Layer demapping, Resource block demapping, MIMO receiver
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6. Select the advantage of single codeword transmission compared to multi codeword
- receiver complexity
- signalling overhead
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7.
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8. consider a UE with 2 antennas and follows the below given codebook
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9. Select correct statements regarding CSI-RS
Note: Reference section 5.2.1.4, Release-15 38.214 3GPP document on CSI Reporting
- Aperiodic CSI-RS transmission requires activation trigger through DCI
- UE can feedback the CSI report to gNB on either PUCCH or PUSCH
- Aperiodic CSI-RS transmission requires de-activation trigger through DCI
- Periodic CSI-RS transmission requires additional activation command after RRC setup
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