Corroborating NSS Location Solutions via High Yield and Accuracy Modules
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Solution Overview
Problem
Navigation satellite systems (NSS) face challenges in achieving accurate location solutions, particularly in environments with low satellite coverage or weak signal strength, where high accuracy receivers may fail to provide solutions due to their high cost and complexity, while high yield receivers sacrifice accuracy for faster location determination.
Innovation Solution
A system that combines high accuracy (HA) and high yield (HY) modules within a navigation satellite system (NSS) receiver to corroborate location solutions, utilizing both modules' data to generate a more accurate and reliable position solution, even in challenging signal conditions, by sharing components and processing signals to enhance overall performance without increasing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high accuracy modules are used to determine location solutions, then measurement precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The receiver is divided into two functional modules: a high yield module that quickly acquires satellite signals and provides initial location solutions, and a high accuracy module that processes the same signals to generate corrected location solutions. This segmentation allows each module to be optimized for its specific function, reducing overall system complexity while maintaining high accuracy capabilities.
Solution Approach 2:
The patent combines the outputs of both high yield and high accuracy modules through a corroborator that integrates their location solutions. The high accuracy module uses corrections derived from comparing its measurements with the high yield module's solutions, effectively merging the fast acquisition capability of the high yield module with the precision correction capability of the high accuracy module.
2Measurement precision
If high accuracy modules are used to determine location solutions, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The high accuracy module creates a corrected version of the location solution by copying and adjusting the high yield module's output. Instead of requiring completely independent high-precision hardware, the system uses software-based correction algorithms that replicate and refine the basic location solution, reducing manufacturing costs while maintaining accuracy.
Solution Approach 2:
The system changes the processing parameters of the satellite signals between the two modules. The high yield module uses standard processing parameters for quick acquisition, while the high accuracy module applies corrected parameters derived from signal comparison and error analysis, achieving high accuracy without requiring expensive specialized hardware.
3Productivity
If high yield modules are used to determine location solutions, then productivity is improved, but measurement precision deteriorates
Solution Approach 1:
The high yield module performs preliminary location determination quickly to provide an initial solution and timing reference. This preliminary action enables the high accuracy module to focus its processing on correcting rather than acquiring signals from scratch, thereby improving both speed and accuracy of the final solution.
Solution Approach 2:
The corroborator continuously compares the outputs of both modules and uses feedback from the high accuracy module's error analysis to adjust and correct the high yield module's location solutions. This feedback loop maintains high productivity by keeping the high yield module operating at full speed while systematically improving accuracy through real-time corrections.
Data Source
AI summary
Embodiments provided herein recite methods and systems for corroborating position system code from Navigation Satellite System (NSS) signals. In one embodiment, a NSS high yield module attempts to determine a high yield location solution based on a first set of PRN codes. In addition, a NSS high accuracy module attempts to determine a high accuracy location solution based on signal processing of the same first set of PRN codes. A location solution corroborator module receives input from both the NSS high yield module and the NSS high accuracy module and generates a corroborated location solution. In one embodiment, a position provider outputs the corroborated location solution.