C-DReAM: SatCom Simulator


System-Level Simulation & Digital Twins for SatCom

C-DReAM simulation scenario on a laptop
C-DReAM SatCom Simulator logo


C-DReAM is a modular system-level simulator for analyzing, optimizing, and designing satellite constellations, non-terrestrial networks (NTN), and 5G TN/NTN systems.

Designed for NGSO and GSO systems alike, C-DReAM provides high-accuracy modeling across link budgets, beam coverage, user traffic demand, routing, interference, coexistence, and more. 

Trusted by SatCom innovators and operators, C-DReAM enables end-to-end exploration of constellation behavior, network performance, and next-generation TN/NTN architectures using high-fidelity simulation. 

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Comprehensive System-Level SatCom Simulator

Simulate orbital motion, beam behavior, link budgets, interference, and traffic in a high-accuracy environment supporting small to mega-sized LEO, MEO & GEO systems.

5G NR-NTN & TN/NTN Architectures

Evaluate 5G NR-NTN performance with modules aligned with 3GPP specifications – including NR-NTN, IoT-NTN, and hybrid TN/NTN scenarios. 

Flexible, Modular Simulation for SatCom

Customize RRM algorithms, payload models, air interfaces, and beam configurations to support a wide range of constellation deployments and research scenarios.


Advanced SatCom & 5G TN/NTN Modeling

Constellation & Orbital Dynamics

Satellite coverage analysis
  • Simulate LEO, MEO & GEO constellations with realistic orbital dynamics
  • Evaluate beam placement, coverage & global system behavior
  • Conduct thermal, radiation & energy analyses assisted with orbit simulations
  • Assess hyperspectral camera & SAR constellations

Performance, Capacity & Interference

Inter-Satellite Link simulation scenario
  • Evaluate link performance, spectral efficiency, and routing
  • Calculate key metrics such as SNR/SINR 
  • Identify bottlenecks and issues early
  • Analyze TN/NTN coexistence and interference
  • Assess performance under varying network assumptions
  • Explore technologies such as Inter-Satellite Links

Network & User-Level Optimization

Satellite connectivity simulation
  • Examine gateway placement, radio resource management, and scheduling strategies
  • Model user terminals across different environments, mobility patterns, and channel conditions
  • Evaluate service availability and user experience under dynamic demand
  • Test optimization strategies early to improve resilience and efficiency

Results Analysis & Visualization

Satellite visualization
  • Review constellation dynamics, beams, and connectivity through visual playback
  • Analyze system and user-level KPIs and metrics
  • Use trace files and visual output to support decision-making and communication
  • Utilize simulation insights to justify design choices and support RFPs, bids, and stakeholder decisions

Validated in ESA & SatCom Projects


C‑DReAM was developed in a European Space Agency project, where its core architecture and RRM capabilities were established. Further development in the DASCE project extended the simulator towards 5G NTN direct access scenarios. The ongoing development of C-DReAM ensures that it remains robust and up-to-date for the design and evaluation of advanced next-generation TN/NTN and SatCom systems.

How C-DReAM Supports Real-World SatCom System Design

 

Optimizing Sateliot’s 5G NB-IoT LEO Constellation Design

Satellite with Sateliot logo orbiting Earth


Sateliot, a leading satellite telecommunications 5G IoT operator, is using C-DReAM and Magister SimLab to develop and optimize its 5G NB-IoT LEO constellation, enhancing global IoT connectivity and enabling accurate modeling of critical real-world scenarios.

Read more 


Why C-DReAM?


C-DReAM provides end-to-end visibility into satellite constellation behavior by combining beam patterns, link budgets, routing, and interference analysis within a single simulation environment.

It enables system-level analysis through:

  • Simulation of orbital movement, antenna patterns, propagation effects, and link performance with fidelity accurate for constellation-level studies
  • Modular architecture that allows users to select and combine the components they need for full-system digital twins
  • Parameter mappings aligned with 3GPP TR 38.821‑type assumptions, supporting NTN system‑level evaluations
  • Validated capabilities through research and innovation work covering NGSO constellations, 5G NR-NTN, UAV SatCom, NB-IoT, and coexistence analysis
Simulated large NGSO constellation scenario

Core Features of the C-DReAM Satellite Simulator

C-DReAM simulation of Inter-Satellite Links

Multi-Orbit Satellite Constellations

  • Support for LEO, MEO & GEO constellations
  • Fully configurable constellations
  • Import of TLE files for real-world ephemerides
  • Inter-Satellite Link (ISL) simulation
  • Trace file generation for analysis

Beams, Bandwidth & Resolution

  • Flexible beam pattern configuration
  • Quasi-Earth-Fixed (QEF) or Earth-Moving (EM) beam support
  • Configurable bandwidth and resolution options

Frequency Bands

Configurable frequency bands, including:

  • FR1/S-band
  • FR2/Ka-band

Air Interfaces

  • 5G NR-NTN, IoT-NTN
  • DVB-S2X
  • DVB-RCS

Payload & Link Budget

  • Adjustable payload resources (transmission power, frequency band/split, time)
  • Link budget calculations
  • SINR/SNR evaluation
  • Support for transparent, regenerative, and ideal payload models

Radio Resource Management

  • Flexible scheduling and resource allocation strategies
  • Time- and frequency-based resource allocation mechanisms
  • API support for custom resource allocation algorithms

Various Frequency Reuse Schemes

For example:

  • FRF-1
  • FRF-3

Key System Statistics

For example:

  • Visibility of satellites in view
  • Carrier power (C), interference (I)
  • SNR, SINR
  • Throughput, load, and capacity metrics
  • Per-user and system-level KPIs

User Equipment & Terminals

  • Multiple methods to input user terminal (UT) locations
  • Traffic demand modeling (e.g. target data rates in kbps)
  • Support for handheld (omni-directional) and VSAT terminals
  • Mobility, orientation, and scenario-specific terminal behaviour

Model Satellite Constellation Performance with C-DReAM


Learn how C-DReAM supports satellite constellation design and system-level performance analysis in an online demo with our simulation experts.

 

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Accelerating the future of wireless system development today with system-level digital twins and detailed simulations. 


 

Magister Solutions Oy


Sepänkatu 14 C 16 FIN-40720 Jyväskylä, Finland

Business ID: 1998796-8

VAT number: FI19987968

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Contact the team

info(at)magister.fi

Simulation Solutions

C-DReAM: SatCom Simulator

Magister SimLab: Simulation GUI

ALIX: 5G TN/NTN Simulator

Professional Services

SatCom Constellation Design Lab

5G TN & NTN Development

Simulation-Assisted R&D

Simulator Development and Consulting

Visualization and Situational Awareness

Software Development