NPTEL 5G Wireless Standard Design Week 1 Assignment Answers 2024
1. The minimum SNR (in dB) required to achieve the capacity of 10 bps/Hz is approximately
- 22 dB
- 28 dB
- 30 dB
- 35 dB
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2. The number of slots/subframe if the system uses a sub-carrier spacing of 60kHz
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3. The system which is using incremental redundancy retransmission mode with an effective code rate of 3/4 did an initial transmission. But the receiver failed to successfully decode the data in first attempt and asked for 2 more retransmissions. Calulate the code rate at which the receiver was able to successfully decode the data
- 1/4
- 3/4
- 3/8
- 3/16
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4. The 5G system has been designed with the following specifications:
(i) Bandwidth = 50 MHz, with usable bandwidth begin 49.5 MHz
(ii) Subcarrier Spacing, ∆f = 15kHz
(iii) Uses N = 4096 point FFT
Calculate ceil(Sampling Rate/106)
Answer :-
5. The 5G system has been designed with the following specifications:
(i) Bandwidth = 50 MHz, with usable bandwidth begin 49.5 MHz
(ii) Subcarrier Spacing, ∆f = 15kHz
(iii) Uses N = 4096 point FFT
Calculate Slot Duration(in ms) ×Subframe Duration (in ms)
Answer :-
6. The 5G system has been designed with the following specifications:
(i) Bandwidth = 50 MHz, with usable bandwidth begin 49.5 MHz
(ii) Subcarrier Spacing, ∆f = 15kHz
(iii) Uses N = 4096 point FFT
Calculate the CP length of the first symbol if rest of the symbols in slot have a CP length of 288 samples.
Answer :-
7. The system uses a Modulation Scheme with the following specifications:
Modulation Order = 2
Target Code Rate (1024 x R) = 894
Calculate it’s spectral efficiency
- 0.8730
- 1.7461
- 1.8951
- 1.9541
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