External GNSS Receiver for Positioning Accuracy
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Solution Overview
Problem
Integrated GNSS chipsets in communication devices, such as cellular devices, often have limited capabilities and reduced positioning accuracy due to their low-end design and inability to process corrections, leading to suboptimal performance in providing full-range features and outputs.
Innovation Solution
A radio frequency hardware component is integrated with or coupled to communication devices, featuring a software-defined GNSS receiver that decodes GNSS signals, corrects for ionospheric perturbations, and employs algorithms like RTKLIB to improve pseudorange accuracy, enabling external processing of GNSS data for enhanced positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If integrated GNSS chipsets are used in communication devices, then device integration and basic positioning capability are improved, but positioning accuracy and processing capability deteriorate
Solution Approach 1:
The system divides GNSS processing into two segments: a low-end integrated chipset for basic signal reception and a high-end external receiver for precise processing. The external receiver handles complex corrections and algorithms while the integrated device provides basic functionality, allowing each component to be optimized for its specific role without compromising overall accuracy.
Solution Approach 2:
The patent introduces an intermediary external receiver system that bridges the gap between basic integrated chipsets and high-precision positioning requirements. This intermediary component receives raw data from the integrated device and applies corrections through algorithms like RTK and ionospheric perturbation compensation, delivering enhanced accuracy without requiring the entire communication device to be redesigned.
2Adaptability or versatility
If integrated GNSS chipsets are used in communication devices, then device integration is improved, but processing capability and correction handling deteriorate
Solution Approach 1:
The patent extracts the complex processing capabilities from the integrated GNSS chipset and places them in a separate external receiver. The integrated device is taken out of the processing loop for complex algorithms, retaining only basic signal reception functions. This extraction allows the external system to handle corrections and computations that would overwhelm the integrated chipset.
Solution Approach 2:
The system transitions from two-dimensional integration (chipset-level) to three-dimensional architecture by introducing an external processing dimension. The external receiver operates as a separate processing dimension that receives raw data and applies sophisticated algorithms, adding computational capability without constraining the integrated device's design.
3Measurement precision
If external processing with RTK algorithms is implemented, then positioning accuracy is improved, but system complexity increases
Solution Approach 1:
The external receiver serves as an intermediary that encapsulates the complex RTK processing and ionospheric correction algorithms. This intermediary component handles the computational complexity internally, presenting simplified corrected position data to the integrated device and end user, thereby managing system complexity in a contained manner.
Solution Approach 2:
The patent replaces complex mechanical integration requirements with software-based correction algorithms running on the external receiver. Instead of designing hardware complexity into the integrated chipset, the system uses computational algorithms (RTK, ionospheric models) to achieve accuracy, substituting hardware complexity with software intelligence.
Data Source
AI summary
A stand-alone radio frequency hardware component includes a first antenna configured for receiving, over-the-air, a first analog Global Navigation Satellite System (GNSS) signal in a first frequency band. A second antenna configured for receiving, over-the-air, at least a second analog GNSS signal in a second frequency band, wherein the first frequency band and the second frequency band are separate and distinct. A digitizer configured for digitizing the first analog GNSS signal into a first digitalized GNSS signal and for digitizing the second analog GNSS signal into a second digitized GNSS signal. A memory for storing the digitized GNSS signals, wherein the digitized GNSS signals are accessed from the memory by a separate communication device.