Mobile Reference Receiver Position Error Correction
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Solution Overview
Problem
Satellite-assisted navigation systems, such as GPS, face accuracy errors due to atmospheric effects, and existing differential GPS (DGPS) methods are limited by the availability and density of stationary reference receivers, which do not provide blanket coverage.
Innovation Solution
The method employs mobile reference receivers equipped with environment sensors to detect stationary landmarks from digital maps, calculate position errors, and transmit these corrections to other vehicles or user receivers, enhancing navigation accuracy without relying solely on stationary reference stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If stationary reference receivers are used for position correction, then position accuracy is improved, but coverage area is limited and receiver density is insufficient
Solution Approach 1:
The patent transforms stationary reference receivers into mobile reference receivers that move with vehicles. The mobile reference receiver calculates position errors relative to stationary landmarks and transmits these corrections to other vehicles, enabling dynamic coverage throughout the operational area rather than being limited to fixed stationary positions
Solution Approach 2:
The patent uses digital maps containing recorded positions of stationary landmarks as copies of physical reference points. These digital copies enable the system to reference known positions without requiring physical presence at every reference point, thereby expanding coverage area while maintaining accuracy
2Measurement precision
If stationary reference receivers are deployed to improve position accuracy, then measurement precision increases, but device complexity and infrastructure requirements increase
Solution Approach 1:
The mobile reference receiver system performs self-service by automatically calculating position errors using its own measurements of stationary landmarks and transmitting these corrections to other vehicles. This eliminates the need for complex centralized infrastructure to manage and distribute correction data
Solution Approach 2:
The patent introduces stationary landmarks as intermediary reference points that do not require active equipment. These passive landmarks serve as the basis for calculating position errors, replacing the need for actively managed stationary reference receivers with simpler, passive environmental features
Data Source
AI summary
The invention relates to a method of increasing accuracy of a global position of a user receiver determined by a navigation system. The global position is corrected based on a position error determined by a mobile reference receiver and transmitted to the user receiver. The invention further relates to a corresponding apparatus.