GNSS Simulator: Specialized in Signal Processing, Communication & Control Systems

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Key Features

Support for all global and regional GNSS constellations: GPS, NavIC, GLONASS, Galileo, BeiDou, QZSS, and SBAS.
Real-time simulation of up to 56 satellites per RF output.
Hardware-in-the-loop (HIL) simulation of vehicle dynamics, including position, velocity, acceleration, and jerk.
Trajectory Simulation:
- Static scenarios
- Dynamic scenarios (KML, NMEA, Waypoint formats)
- Remote control via HIL systems
- Integration with Scenario Editor for user-defined dynamic scenarios
Real-time satellite control with individual power level adjustment and ON/OFF capability
High-speed simulation support up to 1000 km/h
Ultra-low latency HIL update rate up to 1 ms (1 kHz)
User-configurable data rates: 1 kHz, 100 Hz, and 50 Hz
Continuous simulation duration exceeding 24 hours
Multi-constellation and multi-frequency signal generation capability
Flexible configuration to enable or disable constellations and frequency bands
Real-time Dilution of Precision (DOP) indicators
Atmospheric Delay Modeling:
- Ionospheric effects
- Tropospheric effects
Advanced multipath simulation with per-satellite control
Support for 1PPS and custom PPS signal generation
Multi-vehicle simulation with up to 4 independent trajectories
Sensor simulation support for dynamic scenarios
Integration with external platforms such as IPG CarMaker for ADAS testing
RTK support for centimeter-level positioning accuracy simulation
Add-On Support: NavScenX Scenario Editor for advanced dynamic scenario creation

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NavikEye Multi-Constellation GNSS Simulator

NavikEye GNSS Simulator is a software-defined platform for multi-constellation and multi-frequency GNSS signal generation, designed for testing and validation across automotive, aerospace, defense, and industrial applications. It is scalable and customizable, supporting the full product lifecycle from development to production.

The system enables real-time GNSS signal generation with dynamic scenario simulation and hardware-in-the-loop (HIL) integration. It supports simultaneous generation of GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC, and SBAS signals through a single RF output.

NavikEye allows automated scenario execution via TCP/IP and supports real-time inputs such as position, velocity, acceleration, and jerk. It also enables realistic scenario simulation using NMEA, Waypoint, and KML trajectories within a controlled laboratory environment, built on a scalable National Instruments PXI-based architecture.

NavScenX – Dynamic Scenario Creation for NavikEye GNSS Simulator

NavScenX, the powerful scenario creation toolkit add-on for the NavikEye GNSS Simulator based on National Instruments PXI Vector Signal Transceiver. NavScenX is designed to create and execute realistic dynamics routes and environments conditions within a controlled laboratory setup. NavScenX supports route-based dynamic scenario creation, environmental modeling such as urban canyons, tunnels, parking, highways, rural, and open-sky conditions, along with multi-constellation satellite visibility analysis and trajectory file export capabilities.

With NavScenX, engineers can design, visualize, and execute complex GNSS dynamic scenarios that are seamlessly applied to NavikEye Dynamic GNSS Simulation mode. This enables repeatable, high-fidelity GNSS testing, helping reduce field testing efforts and accelerate validation for automotive, aerospace, defense, and autonomous systems.

🔹 Key Highlights:

User-defined route creation with location search and integrated map.
Multi-point and multi-plot scenario simulation view.
Parking, tunnel, rural, with custom environment factors modelling.
Multi-constellation satellite visibility visualization
KML, NMEA, CSV, and waypoint import/export
Seamless execution in NavikEye GNSS Simulator (Dynamic Scenario Mode)

Bring real-world Dynamics Scenarios challenges into a controlled, repeatable, and cost-effective test environment.

RTK (Real-Time Kinematic) Simulation Support

NavikEye GNSS Simulator supports advanced RTK simulation, enabling high-precision GNSS testing within a controlled laboratory environment. With support for RTCM v3-compliant correction data and runtime control of correction application, users can seamlessly apply differential corrections without relying on live NTRIP services or physical reference stations.

This capability enables repeatable and deterministic testing, significantly reducing the need for expensive and time-consuming field validation.

🔹 Key Capabilities:

Supports RTCM v3-compliant correction data
Runtime control of correction application
No dependency on live NTRIP services or physical reference stations
Enables repeatable and deterministic testing
Reduces need for expensive and time-consuming field validation

NavikEye RTK simulation enables accurate reproduction of real-world correction conditions by leveraging carrier-phase and code-based techniques, allowing users to evaluate receiver performance and positioning algorithms with high precision.

Advanced Multipath Simulation

Multipath is a major source of GNSS positioning errors, especially in urban, automotive, aerospace, and high-precision applications. NavikEye addresses this with advanced, configurable multipath simulation for realistic and repeatable testing. The system supports up to 4 configurable reflection paths per satellite, enabling accurate modeling of real-world signal reflections.

🔹 Key Features:

Simulation of multipath effects for urban, ADAS, aerospace, and timing applications
Support for up to 4 reflection paths per satellite
Multipath models:
- Fixed delay offset
- Doppler offset
- Rayleigh fading (NLOS)
- Rician fading (LOS with reflections)
Real-time satellite-level control:
- Individual ON/OFF control
- Scenario-based and dynamic activation

🔹Configuration Capabilities

Adjustable path delay and attenuation per reflection
Doppler offset configuration for dynamic environments
Rician K-factor control for LOS/NLOS conditions
Per-constellation multipath configuration
Save and reuse multipath profiles for repeatable testing

Antenna Modeling & Body Masking

NavikEye Antenna Modeling extends GNSS simulation by incorporating real-world antenna behavior into the test environment. It enables accurate representation of antenna radiation patterns, orientation, and structural masking effects, which significantly influence signal reception, tracking performance, and positioning accuracy.

By modeling these effects within a controlled laboratory setup, NavikEye bridges the gap between theoretical GNSS simulation and real-world RF conditions, allowing engineers to perform more reliable and repeatable validation.

🔹 Key Features:

Import and configure antenna gain and phase patterns (XML/CSV)
Antenna placement and orientation configuration
Body masking simulation (vehicle, aircraft, structural blockage)
Interactive 3D visualization (azimuth/elevation views)
Flexible editing and management of antenna pattern data

NavikEye enables precise modeling of directional gain, attenuation, and signal blockage, providing a high-fidelity environment to evaluate GNSS receiver performance across automotive, aerospace, and defense applications.

GNSS Simulator Constellation and Supported Bands

GNSS Simulator Specifications

Feature	Value	Comments
Number of Simulated Satellites	56**	Simultaneous generation of up to 56 channels from one RF output
HIL Streaming Rate and Latency	1kHz (1ms) - 100Hz (10ms) - 50Hz(20ms)	User configurable data rate
Elevation Angle	0° to 90°	Removes the satellites from the visible satellites based on the user specified elevation angle value.
Velocity	1000 kmph
Simulation Time	User Configurable Time and Date (UTC) or System Time. Leap second simulation
Trajectory Configuration	Static, Dynamic waypoint files KML and NMEA Formats.
Satellite Vehicle Parameters	Individual satellites power ON/OFF control.
Pseudo Range	± 0.001 m	Uncertainty in the phase offset calculated from the range.
Pseudo Range Rate	± 0.001 m/s	Uncertainty in the simulation of the Doppler shift calculated from the range rate.
Interchannel Bias	0	Uncertainty in the carrier phase of any two satellites.
Scenario Simulation		Open sky, tunnel Environment, urban canyon, rural environment, hill and mountain.
Sensor simulation		Sensor simulation indicates the current sensor simulation details.
DOP Calculation	PDOP, TDOP, HDOP, VDOP, EDOP, NDOP, GDOP	DOP indicates the current simulated satellite Dilute of precision values.
Atmospheric Model	Ionospheric model: Klobuchar. Tropospheric model: Saastamoinen and MOPS.	Atmospheric error simulation with different model.
Multipath Simulation	Fixed Offset, Doppler offset, Rayleigh Fading, and Rician Fading.	Simulates max 4 paths per Satellites.
Offline Map Support		Map view display without internet access.
Multiple Trajectory	Trajectory1 to Trajectory 4	Simulate up to 4 trajectories at a time.
1PPS	1PPS and Custom PPS	Generate Pulse signals with custom Period and Duty cycle.
Scenario Editor		Creates the real world scenarios ( Eg : Parking, Tunnel, Hill, Forest etc ,.)

GNSS Simulator Specifications(Instrument Dependent)

Parameters	AST-1000 (Vector Signal Transceiver)	NI PXIe-5840/ NI PXIe-5841 (Vector Signal Transceiver)	NI PXIe-5644R/ NI PXIe-5645R/ NI PXIe-5646R (Vector Signal Transceiver)	NI PXIe-5672 (Vector Signal Generator)	NI PXIe-5673E (Vector Signal Generator)	USRP-2920/ USRP-2922/ USRP-2930/ USRP-2932 (RF Transceiver)	USRP-29xxR (RF Transceiver)
Number of Constellations	Multi-Constellation	Multi-Constellation	Single-Constellation	Single-Constellation	Single-Constellation	Single-Constellation	Multi-Constellation
Number of Satellites per RF Output	56**	56**	12*	12*	12*	12*	32**
Number of RF Outputs	1	1	1	1	1	1	2
Frequency Range	9 kHz to 6 GHz	9 kHz to 6 GHz	65 MHz to 6 GHz	250 kHz to 2.7 GHz	50 MHz to 6.6 GHz	50 MHz–2.2 GHz (2920/2930) 400 MHz–4.4 GHz (2922/2932)	50 MHz–2.2 GHz (2940R/2950R) 400 MHz–4.4 GHz (2942R/2952R) 10 MHz–6 GHz (2944R/2954R)
Initial Frequency Accuracy	±200 × 10⁻⁹	±200 × 10⁻⁹	±200 × 10⁻⁹	±50 ppb	±3 × 10⁻⁶	2.5 ppm	2.5 ppm
Power Level Accuracy (Typical)	±0.45 dB	±0.45 dB	±0.5 dB	±1.0 dB	±0.6 dB	-	-
RF Output Harmonics	-32 dBc @15 dBm	-32 dBc @15 dBm	-30 dBc @<5 dBm	-35 dBc max @0 dBm	-30 dBc max	-	-
RF Output Non-Harmonic Spurious	-63 dBc (≤1 MHz offset)	-63 dBc (≤1 MHz offset)	-75 dBc (≤1 MHz offset)	-58 dBc max @0 dBm	-51 dBc max	-	-
Phase Noise @20 kHz	-102 dBc/Hz	-102 dBc/Hz	-99 dBc/Hz	-102 dBc/Hz	-105 dBc/Hz	-	-
Output Noise Density @-30 dBm	-165 dBm/Hz	-165 dBm/Hz	-168 dBm/Hz	-150 dBm/Hz	-152 dBm/Hz	-	-
Operating Temperature	0°C to 45°C	0°C to 45°C	0°C to 55°C	0°C to 55°C	0°C to 55°C	23°C ±5°C	23°C ±5°C
RF Connector	SMA Female	SMA Female	SMA Female	SMA Female	SMA Female	SMA Female	SMA Female
Recommended Application	Production, R&D, Functional & Performance Test	Production, R&D, Functional & Performance Test	Production, R&D, Functional & Performance Test	Production, R&D, Functional & Performance Test	Production, R&D, Functional & Performance Test	Production, R&D, Functional Test	Production, R&D, Functional Test

Note :

* Maximum number of supported satellites depends on the processing power of the computer.

** Maximum number of supported satellites depends on the processing power of the computer and the number of RF outputs.

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Key Features - Generation

Supports both MAC and PHY layer signal configuration

Frame Formats: Data Frame, Beacon Frame, Acknowledgement Frame and MAC Command Frame

Generation of various frame formats including Data Frame, Beacon Frame, Acknowledgement Frame MAC Command Frame

Payload Types: PN Sequence, User Defined Bits, Test Pattern and From File

Supports multiple frames with user configurable inter frame spacing

Generation of multiple frames with user configurable inter frame spacing. The payload is continuous across frames. This enables receiver sensitivity tests with longer payload sequence.