ISACSim 3D Ray-Tracing Electromagnetic Waveform & Multipath Simulation

ISACSim provides GPU-accelerated shooting-and-bouncing ray (SBR) electromagnetic simulation engines for complex 6G environments, modeling multi-bounce reflections, diffuse scattering, and target micro-Doppler.

ISACSim GPU Ray-Tracing & Propagation Engine

ISAC Core: ISACSim Core — GPU Ray-Caster & SBR Waveform Engine

6G ISAC Nodes & Beamforming Subsystems

Shooting-and-Bouncing Rays (SBR)
Material Dielectric Database
Micro-Doppler Clutter Synthesizer
Full-Wave FEM/FDTD Interlock
Synthetic CSI / Echo Stream Export

Architectural Layers & Waveform Pipelines

Schicht 1: Dual-Funktionale Wellenform & Basisband (OTFS / OFDM-Radar / Fractional Fourier Transform / Ambiguity Function): OTFS-Modulation und fraktionierte Chirp-Synthese zur Vermeidung von Inter-Carrier-Interferenzen bei starken Doppler-Spreizungen.
Schicht 2: Massive MIMO & Beamforming-Frontends (140 GHz D-Band / True-Time-Delay (TTD) / Hybrid Analog-Digital Beamforming): Sub-THz-Phased-Array-Architekturen mit True-Time-Delay-Kompensation, simultanen Datenstrahlen und hochpraezisen Radar-Trackingkeulen.
Schicht 3: Radarsignalverarbeitung & 4D-Punktwolken (2D-FFT Range-Doppler / MUSIC AoA / CFAR Detection / Micro-Doppler Extraction): Subdezimeter-Entfernungs- und Geschwindigkeitsaufloesung, CFAR-Zieldetektion und Mikro-Doppler-Klassifizierung von Drohnenrotoren.
Schicht 4: Netzwerksensorik-Orchestrierung & 3GPP Rel-19 (3GPP Rel-19 ISAC Core / Sensing Function (SF) / Reconfigurable Intelligent Surfaces (RIS)): Zellfreie kollaborative Radarnetze und dynamische Ressourcenallokation zum Ausgleich von Kommunikations-SLA und Radar-Abtastraten.

Sensing Telemetry & Benchmarks: <5 cm (Entfernungsaufloesung) | 0.1 m/s (Geschwindigkeitsgenauigkeit) | <10 ms (Radar-Bildlatenz) | 3GPP Rel-19 (Globaler Standard)

GPU 3D Ray-Tracing & Waveform Propagation in ISACSim

Designing millimeter-wave and sub-THz dual-functional waveforms requires exact physical modeling of propagation channels. Urban street canyons, automotive interiors, and smart factories exhibit dense multipath reflections that degrade communications while generating clutter for radar. ISACSim models every ray interaction using physical optics (PO) and the uniform theory of diffraction (UTD) on modern GPU clusters.

Core Engineering Areas

GPU-Accelerated Shooting-and-Bouncing Rays (SBR) Simulation — Simulating billions of electromagnetic ray paths per second across dense urban geometry using NVIDIA OptiX and CUDA RT cores.
Dielectric Material Modeling and Diffuse Surface Scattering — Accurate modeling of real-world materials including reinforced concrete, low-emissivity glass, asphalt, and vegetation at sub-THz frequencies.
End-to-End ISAC Link-Level and System-Level Digital Prototyping — Exporting synthetic channel matrices and raw radar ADC data cubes directly into MATLAB, Python, and C++ baseband algorithmic pipelines.