SSR to OSR Conversion Device for GNSS Augmentation
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Solution Overview
Problem
Existing GNSS receivers cannot directly use satellite-based augmentation system (SBAS) state space representation (SSR) signals due to their non-universal applicability and high operational costs, limiting their use in various applications.
Innovation Solution
A method and device for converting SSR information to observation space representation (OSR) information, enabling the use of SSR signals by conventional GNSS receivers through interfaces like Wi-Fi, Bluetooth, and RS485, and integrating multi-frequency satellite antennas for reduced size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If OSR signals are used directly by GNSS receivers, then positioning precision is improved, but communication bandwidth requirement increases and satellite power consumption increases
Solution Approach 1:
The patent introduces an intermediary conversion device that receives SSR signals from satellites and converts them to OSR format. This mediator allows standard GNSS receivers to access high-precision positioning data without requiring direct high-bandwidth OSR transmission from satellites, thus resolving the contradiction between positioning precision and bandwidth consumption
Solution Approach 2:
The patent transforms the data format parameter from SSR to OSR through a conversion device. By changing the representation parameters of the navigation data, the system enables compatibility with standard receivers while maintaining the precision benefits of OSR format without requiring satellites to transmit at high power
2Loss of information
If SSR signals are broadcasted by satellite-based augmentation systems, then data transmission to users is achieved, but the signals are not universally applicable to common GNSS receivers
Solution Approach 1:
The conversion device serves as an intermediary that translates SSR format into OSR format that is compatible with standard GNSS receivers. This mediator enables universal compatibility without losing the differential positioning information, allowing common receivers to utilize the augmentation data
3Measurement precision
If SSR signals are used for high-precision positioning, then positioning accuracy is improved, but user cost increases
Solution Approach 1:
The patent creates a copy/translation of the SSR data into OSR format through a conversion device. This copying process allows users to access high-precision positioning information through standard receivers without incurring the additional cost of specialized SSR-capable equipment, thus reducing user cost while maintaining positioning accuracy
Data Source
AI summary
A method for converting state space representation (SSR) information to observation space representation (OSR) information includes: obtaining the SSR information, obtaining the OSR information, obtaining information of a virtual observation distance, and obtaining delay information of a troposphere and delay information of an ionosphere. A device for converting SSR information to OSR information includes: a satellite antenna, a global navigation satellite system (GNSS) board, a radio antenna, a mobile network module and antenna, a Bluetooth module and antenna, a Wi-Fi module and antenna, a status indicator light, a plurality of output interfaces, and a power supply unit. A conversion algorithm is realized for converting SSR information to OSR information, and the converted OSR information follows the international standard protocols and can be received by most GNSS receivers. A conversion device is developed based on the aforementioned method.