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PATHFINDER

NAVENTIK PATHFINDER is the off-the-shelf GNSS receiver software for demanding automotive and industrial applications. PATHFINDER uses graphics acceleration resources of future sensor fusion and autonomous driving integration platforms.

Technology

PATHFINDER is NAVENTIK’s navigation engine for demanding automotive localization tasks.

PATHFINDER will be integrated into the ADAS, In-vehicle system or any other mobile platform. Contrary to all other technologies PATHFINDER enables the ultra-tightly coupled integration into your existing data fusion application. This makes PATHFINDER the first GNSS receiver in the world to offer completely different perspectives on today's use of satellite navigation.
PATHFINDER Software GNSS Receiver combines GNSS baseband processing with probabilistic error modeling - the most critical error source for ground transport applications. By generating positioning data and real-time confidence measures, sensor data fusion systems can achieve better absolute positioning performance and integrity on a mass market price level.
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Traditional Setup

A dedicated hardware GNSS receiver plus antenna results in a complex system architecture. An integrated supervision of the receiver performance is not possible.

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PATHFINDER

The PATHFINDER Software Receiver is integrated into the central sensor fusion ECU. This approach leads to a simplified architecture and enables an integrated safety concept.

Multipath. We redesigned the entire signal processing from scratch, including GNSS signal tracking using multipath, explicit code and carrier models that generate the corresponding error budget as probability density when the system is exposed to signal interference. That means PATHFINDER notifies you when multipath occurs, how much the influence is and what this means for the accuracy and the integrity of the vehicle state estimation.

Safety

Satellite Navigation for vehicle automation from SAE level 3+ requires an integrated safety concept for GNSS signal processing.

Exact vehicle positioning is a major challenge for V2X, ADAS and AVs. Future safety critical driving functions also require functional safety (FuSi) down to the sensor layer. NAVENTIK PATHFINDER enables both - a more robust localization even in urban environments and the implementation of FuSi concepts through transparency of the signal pre-processing within receiver framework.
Safety Lifecycle. In order to implement a security concept for GNSS position data, the entire processing chain from the GNSS ground segment via satellites in space to the final position in a digital environmental model must be covered. This includes explicit modelling and mitigation of all known sources of error. Some of the influences are related to signal propagation disturbances, others to errors inherent in the system. Most of them can be monitored by external service providers and integrity information must be evaluated in real time in the receiver.
The most critical remaining sources of error are linked to local environmental conditions such as multipath errors or non-line-of-sight errors. These errors cannot be monitored by external services - the GNSS receiver must be qualified to evaluate this additional error budget. The PATHFINDER baseband processing is extended to explicit models for dealing with these uncertainties.
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PATHFINDER baseband processing. As we were designing all signal processing from scratch we were including GNSS signal tracking under multipath - explicit code and carrier models that generate the correspoding error budget as probability density.

Function developers will be notified by PATHFINDER if multipath occurs, how much the influence is and what this means for the accuracy and the integrity of the vehicle state estimation.

Additionally, the integrated safety layer can recover hardware defects for the antenna and frontend in real time. No redundant antenna or receiver design is needed. This keeps costs down and architecture simple.

Features

PATHFINDER - The fully configurable software GNSS receiver.

  1. Quality GNSS Software Receiver  - Due to the utilization of GPU resources in vehicle automation a software based GNSS sensor solution can now substitute expensive legacy hardware components to achieve mass market readiness!
  2. High accuracy positioning including real-time confidence estimate - Our multi-constellation and multi-band GNSS receiver delivers the next level of scalable high precision positioning. PATHFINDER reliably estimates the vehicle system state including position, velocity and heading and their corresponding confidence. This is the basis for the safety critical GNSS integration.
  3. Safety compliance - PATHFINDER is developed according the highest quality standards of the automotive industry. Our vision is to provide an ISO26262 compliant GNSS receiver for safety critical vehicle applications. 
  4. Advanced Multipath Mitigation Models - Multipath and non-line-of-sight (NLOS) effects strongly degrade GNSS positioning performance. PATHFINDER uses advanced probabilistic multipath mitigation algorithms to detect the type of pseudorange measurement to adjust the protection level of the state estimate.
  5. Configurable Operation Modes - The tightly coupled integration into your existing data fusion application leads to an extremely robust and high-performance positioning with options to extend the coupling with further vehicle onboard sensors.
  6. In-Field Software Upgrades - Keep PATHFINDER up to date within the product lifecycle. Future GNSS features are delivered by a simple update process.
  7. Wide Support of ADAS Platforms and Middlewares - For an easy integration into prototyping and evaluation frameworks, PATHFINDER supports common middlewares and is tested on various ADAS platforms e.g. NVIDIA Drive PX2.
  8. Low Cost Serial Production - The use of PATHFINDER drastically lowers the cost factor compared to a conventional hardware GNSS solution. The integration of PATHFINDER within E/E vehicle systems reduces the hardware overhead and results in a simplified architecture.
The PATHFINDER front end will be tailored to your needs when it comes to integration into your hardware environment. Perhaps you already have a configurable radio front end in your existing communication module or infotainment system? Then you can even save that cost.
In short, PATHFINDER integrates all safety-relevant aspects of vehicle localization. All steps of signal processing are carefully revised so as not lose or falsify any information relevant for the estimating a valid error budget. The PATHFINDER module will be interfaced by an API tailored to your needs and requirements; as we are targeting the implementation on your ECU or ADAS processor we are carefully developing according to automotive standards and we are also going to comply with ISO 26262.

Address 

NAVENTIK GmbH
Am Walkgraben 13
09119 Chemnitz
Germany

Contact 

hello@naventik.de
☎ +49 371 337 1370

Feedback

We are curious to hear how you use PATHFINDER and what you are experiencing. Send your ideas and suggestions!