Sionna Visualizer — Open Source Web Dashboard for Sionna 6G Simulation Results (Live Demo)

[vinayakgote44]

Hi everyone 👋

I’m Vinayak, a Java backend developer from Pune, India
and a member of the NVIDIA AI Aerial / 6G Developer Program.

Over the past few weeks I’ve been building something I
couldn’t find anywhere — a visual, interactive, shareable
web dashboard on top of NVIDIA Sionna simulation results.

I’m calling it Sionna Visualizer.

🔗 Live Demo: https://sionna-visualizer.vercel.app
🐙 GitHub: GitHub - Vinu2111/sionna-visualizer: A full-stack web dashboard for NVIDIA Sionna 6G simulation results. Angular + Java + Python + PostgreSQL. · GitHub

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THE PROBLEM I KEPT RUNNING INTO
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Sionna outputs raw Python data — tensors, numbers,
Jupyter notebook graphs. Every researcher I’ve spoken
to has the same workflow: run simulation, copy data
to Excel or matplotlib, generate chart manually,
share a screenshot.

There was no web-based visual layer. No shareable links.
No history. No comparison tool. I built one.

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WHAT IT DOES RIGHT NOW
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Three simulation types — all running real mathematics:

1. BER vs SNR Simulation
   → Real AWGN channel model
   → Two curves: theoretical (closed-form erfc equations)

   • simulated (Monte Carlo, 100,000 bits)
     → BPSK / QPSK / 16QAM / 64QAM
     → Logarithmic chart, 25 SNR points
     → 94ms on CPU — no GPU required

2. Beam Pattern Visualization
   → Uniform Linear Array (ULA) model
   → 8 / 16 / 32 / 64 antenna elements
   → 28 GHz / 39 GHz / 60 GHz / 77 GHz
   → Polar chart showing main lobe + side lobes
   → 16-element ULA gives -13.15 dB SLL — textbook correct
   → Steering angle control: -90° to +90°

3. Modulation Comparison
   → BPSK vs QPSK vs 16QAM vs 64QAM simultaneously
   → Crossover points computed automatically
   → Spectral efficiency tradeoff visible instantly

Plus:
→ Every simulation saved to PostgreSQL with full history
→ Shareable public link for every result
→ Simulation comparison tool — select any two from
history, overlay on one chart, winner computed automatically
→ JWT authentication
→ Full mobile responsive layout

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TECH STACK
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Frontend: Angular 17 + Chart.js (Vercel)
Backend: Java 17 + Spring Boot 3 (Railway)
Bridge: Python 3.10 + FastAPI + Sionna (Railway)
Database: PostgreSQL (Railway)
Auth: Spring Security + JWT

Fully open source under MIT License.
docker-compose up runs the entire stack locally.

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WHAT IS NOT BUILT YET
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Being transparent about current limitations:

→ GPU Sionna simulation — currently using CPU-compatible
AWGN model. Full GPU Sionna integration is next.
→ AODT (city-scale digital twin) integration — planned
→ MIMO channel visualization — planned
→ Ray tracing simulation support — planned

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WHY I’M POSTING HERE
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This community is exactly who I built this for.

I have three genuine questions for anyone who uses
Sionna in their research:

1. What Sionna simulation outputs do you wish you
   could visualize that aren’t in the tool yet?

2. What would make this actually useful in your
   daily research workflow?

3. Would a REST API that lets you POST your own
   Sionna output JSON and get back a chart URL
   be useful?

Any feedback — even harsh — is genuinely appreciated.
This is being built in public and your input directly
shapes what gets built next.

Full build-in-public journey documented at:
vinayak6g.hashnode.dev

Thank you for your time.
— Vinayak

[eobiodu]

Thanks Vinayak for your contribution. Do keep the innovations coming.