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ti_mo
2026-06-12 16:22:10 +02:00
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lab_4/link_level_measurements.md
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@@ -11,32 +11,34 @@ by Timo Niemann
> This report will be a bit more 'well defined' > This report will be a bit more 'well defined'
## Reproducibility ## Reproducibility
| Reproducibility factor | Task 1 value | Task 2 value | Task 3 value | Task 4.1 value | Task 4.2 value | > '-' means use the last non '-' left value
|:---|:---:|:---:|:---:|:---:|:---:|
| MATLAB Version | 26.1.0.3251617 (R2026a) Update 2 | - | - | - | - | | Reproducibility factor | Task 1 value | Task 2 value | Task 3 value | Task 4.1 value | Task 4.2 value | Task 5.1 value | Task 5.2 value |
| 5G Toolbox Version | 26.1 | - | - | - | - | |:---|:---:|:---:|:---:|:---:|:---:|:---:|:---:|
| WLAN Toolbox Version | 26.1 | - | - | - | - | | MATLAB Version | 26.1.0.3251617 (R2026a) Update 2 | - | - | - | - | - | - |
| Communications Toolbox Version | 26.1 | - | - | - | - | | 5G Toolbox Version | 26.1 | - | - | - | - | - | - |
| Parallel Computing Toolbox Version | 26.1 | - | - | - | - | | WLAN Toolbox Version | 26.1 | - | - | - | - | - | - |
| Random stream | mt19937ar with seed | - | - | - | - | | Communications Toolbox Version | 26.1 | - | - | - | - | - | - |
| Random seed | 666 | - | - | - | - | | Parallel Computing Toolbox Version | 26.1 | - | - | - | - | - | - |
| SNR vector | $0:1:40\,dB$ | - | - | - | - | | Random stream | mt19937ar with seed | - | - | - | - | - | - |
| Packet budget | 1024 packets per SNR point | - | - | - | - | | Random seed | 666 | - | - | - | - | - | - |
| maxNumErrors | 50 | - | - | - | - | | SNR vector | $0:1:40\,dB$ | - | - | - | - | - | $30\,dB$ |
| NTN profile | NTN-TDL-C | - | - | - | - | | Packet budget | 1024 packets per SNR point | - | - | - | - | - | 1 representative packet per profile |
| Carrier frequency | 2.4 GHz | - | Task 3.2: [1 2.4 5 5.8 6 12 24 60] GHz | - | - | | maxNumErrors | 50 | - | - | - | - | - | 1 |
| LEO altitude | 600 km | - | - | - | - | | NTN profile | NTN-TDL-C | - | - | - | - | NTN-TDL-A to NTN-TDL-D | - |
| Elevation sequence | 10° to 90° to 10° over the packet sequence | - | - | - | - | | Carrier frequency | 2.4 GHz | - | Task 3.2: [1 2.4 5 5.8 6 12 24 60] GHz | - | - | 2.4 GHz | - |
| Mean elevation angle | 50° | - | - | - | - | | LEO altitude | 600 km | - | - | - | - | - | - |
| Mean slant range | 906.32 km | - | - | - | - | | Elevation sequence | 10° to 90° to 10° over the packet sequence | - | - | - | - | - | first packet of the sequence, 10° |
| Mean satellite Doppler shift | 32.73 kHz | - | changes with carrier frequency | - | - | | Mean elevation angle | 50° | - | - | - | - | - | not averaged, 10° representative packet |
| Normalized CFO | 0.419 | - | changes with carrier frequency | - | - | | Mean slant range | 906.32 km | - | - | - | - | - | not averaged, 10° representative packet |
| Channel bandwidth | 20 MHz | - | - | - | [20 40 80 160 320] MHz | | Mean satellite Doppler shift | 32.73 kHz | - | changes with carrier frequency | - | - | 32.73 kHz | not averaged, 10° representative packet |
| MCS | 2 | - | - | [0 2 4 8 10 12 13] | 3 | | Normalized CFO | 0.419 | - | changes with carrier frequency | - | - | 0.419 | not averaged, 10° representative packet |
| APEP length | 1000 B | [250 1000 4000 8000 12000] B | Task 3.1: [250 1000 4000 8000 12000] B; Task 3.2: 8000 B | - | - | | Channel bandwidth | 20 MHz | - | - | - | [20 40 80 160 320] MHz | 20 MHz | 320 MHz |
| TX/RX antennas | 1-by-1 SISO | - | - | - | - | | MCS | 2 | - | - | [0 2 4 8 10 12 13] | 3 | 2 | - |
| Pilot tracking | disabled | - | enabled | - | - | | APEP length | 1000 B | [250 1000 4000 8000 12000] B | Task 3.1: [250 1000 4000 8000 12000] B; Task 3.2: 8000 B | - | - | 1000 B | - |
| Parallelization | parfor over SNR points | - | - | - | - | | TX/RX antennas | 1-by-1 SISO | - | - | - | - | - | - |
| Pilot tracking | disabled | - | enabled | - | - | disabled | - |
| Parallelization | parfor over SNR points | - | - | - | - | parfor over SNR points per profile | parfor over NTN profiles |
<div style="page-break-after: always;"></div> <div style="page-break-after: always;"></div>
@@ -183,6 +185,8 @@ The MCS sweep shows that higher MCS values require higher SNR to achieve the sam
Reflecting this analysis: Higher MCS values tend to be more sensitive to NTN Doppler and residual CFO. Reflecting this analysis: Higher MCS values tend to be more sensitive to NTN Doppler and residual CFO.
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#### 4.2 #### 4.2
![PER over SNR channel bandwidth sweep](per_snr_cbw.svg) ![PER over SNR channel bandwidth sweep](per_snr_cbw.svg)
@@ -205,6 +209,8 @@ The channel profile sweep shows that the selected NTN-TDL profile has a visible
This means that the channel profile changes the effective link robustness even though all other baseline parameters are kept constant. The difference is caused by the different multipath and fading behavior represented by the NTN-TDL profiles. This means that the channel profile changes the effective link robustness even though all other baseline parameters are kept constant. The difference is caused by the different multipath and fading behavior represented by the NTN-TDL profiles.
<div style="page-break-after: always;"></div>
#### 5.2 #### 5.2
![CFR Comparision on SNR 30 between NTN-TDL Channel Profiles](cfr_comp.svg) ![CFR Comparision on SNR 30 between NTN-TDL Channel Profiles](cfr_comp.svg)
lab_4/link_level_measurements.pdf
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