Navigational Solution Manager Position Computation
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Solution Overview
Problem
Current GPS systems face inaccuracies in computing receiver position due to uncertainties in receiver clock offset, leading to less accurate navigation solutions.
Innovation Solution
A navigational computing device with a processor and memory that executes a navigational solution manager to collect data from satellites, compute initialization navigational measurements, and calculate the receiver position using these measurements, employing methods such as weighted least-square estimation and iterative convergence to minimize errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pseudoranges are used to account for receiver clock offset, then the navigation solution can be computed, but the measurement precision deteriorates due to uncertainties in receiver clock offset
Solution Approach 1:
The patent applies preliminary action by computing an initial receiver position using pseudoranges before refining the solution. This initial position, combined with Doppler measurements, serves as a starting point for iterative refinement that converges to a more accurate position, thereby resolving the contradiction between being able to compute a navigation solution and achieving high measurement precision
Solution Approach 2:
The patent implements feedback through iterative refinement processes where the initial position estimate is used to compute Doppler measurements, which then feedback into improved position calculations. This iterative feedback loop continuously refines the receiver position estimate, transforming the imprecise initial pseudorange-based solution into a high-precision final solution
2Ease of manufacture
If traditional pseudorange-based position computation is used, then the system is simple to implement, but the manufacturing precision deteriorates due to increased computational complexity requirements for refinement
Solution Approach 1:
The patent applies segmentation by dividing the position computation process into distinct phases: an initial simple pseudorange-based computation followed by a refinement phase using Doppler measurements. This segmentation allows the system to maintain simplicity in the basic implementation while achieving high precision through the optional refinement stage, resolving the contradiction between ease of manufacture and manufacturing precision
Data Source
AI summary
Systems and methods for processing navigational solutions are provided. In this regard, a representative system includes a navigational computing device comprising a processor and memory that stores a navigational solution manager that is executed by the processor to provide a receiver position. The navigational solution manager is configured to collect navigational data from at least one satellite vehicle, compute initialization navigational measurements based on the collected navigational data, and compute the receiver position using the initialization navigation measurements.