task4 done

2026-06-12 14:22:18 +02:00
parent 9065374ea7
commit 7519c23442
4 changed files with 32 additions and 17 deletions
@@ -176,6 +176,21 @@ At very high SNR, pilot tracking can also have little visible impact because the

 ## Task 4

+#### 4.1
+
+![PER over SNR MCS sweep](per_snr_mcs.svg)
+The MCS sweep shows that higher MCS values require higher SNR to achieve the same packet error rate. Lower MCS values are more robust and can reach PER values around $10^{-3}$ within the simulated SNR range, but this comes at the cost of a lower data rate. For MCS 12 and MCS 13, the PER does not fall below $10^{-1}$ in the observed SNR range. In particular, MCS 13 still shows a high packet error rate around 34 dB SNR where as MCS 0 reaches PER $10^{-3}$, so it is not reliable under these channel conditions.
+
+Reflecting this analysis: Higher MCS values tend to be more sensitive to NTN Doppler and residual CFO.
+
+#### 4.2
+
+![PER over SNR channel bandwidth sweep](per_snr_cbw.svg)
+
+Analyzing the bandwidth sweep, the observed PER improves as the channel bandwidth increases. In this simulation setup, CBW320 reaches a PER of approximately nearly $10^{-3}$ below 10 dB SNR, while CBW20 requires roughly 34-35 dB SNR to reach a comparable PER. This indicates that, for the fixed APEP length and MCS used here, a wider channel bandwidth improves the link robustness in the simulated NTN channel.
+
+So in this simulation a higher bandwith improves PER.
+
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 ## Task 5