Satellite Positioning Server Multipath Interference Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional RTK positioning systems face challenges in accurately determining positioning signals affected by multipath interference, which hinders accurate positioning calculations due to the lack of effective methods to differentiate signal quality between satellites.
Innovation Solution
A satellite positioning system and method where a server receives positioning data from multiple terminals, compares signal reception quality between satellites, and excludes affected satellites from the calculation, improving accuracy by determining and excluding signals impacted by multipath interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RTK calculation is performed by positioning terminal using conventional method, then positioning terminal can perform positioning calculation independently, but positioning terminal cannot accurately determine multipath-affected signals and positioning accuracy deteriorates
Solution Approach 1:
The patent combines multiple positioning terminals into a networked system where signal reception quality data is shared collectively. The server aggregates reception quality information from multiple terminals to perform comprehensive signal quality differentiation, enabling accurate identification of multipath-affected signals that individual terminals cannot detect alone.
Solution Approach 2:
The patent introduces a server as an intermediary between positioning terminals and the RTK calculation process. The server receives positioning data from multiple terminals, performs centralized signal quality differentiation using reception quality information, and provides processed positioning results back to terminals, thereby solving the limitation of individual terminal capability.
2Measurement precision
If positioning terminal performs RTK calculation independently, then processing load and cost of terminal is reduced by moving calculation to cloud server, but terminal loses ability to detect multipath signals
Solution Approach 1:
The server acts as an intermediary that performs the complex signal quality comparison and multipath detection functions. Instead of requiring each terminal to have complex detection capabilities, the server centralized processing handles signal quality differentiation using reception quality data from multiple terminals, reducing individual terminal complexity while improving overall detection accuracy.
Solution Approach 2:
The system implements feedback mechanisms where reception quality information from multiple terminals is continuously collected and analyzed by the server. This feedback loop enables the server to identify multipath-affected signals and adjust positioning calculations accordingly, improving detection accuracy without increasing terminal complexity.
3Productivity
If conventional RTK calculation is used without signal quality differentiation, then positioning calculation can be performed with available signals, but positioning accuracy deteriorates due to inclusion of multipath-affected signals
Solution Approach 1:
The patent extracts and identifies multipath-affected signals from the total set of received positioning signals by comparing reception quality data across multiple terminals. The server separates problematic signals from reliable signals, excluding only the multipath-affected portion from RTK calculations while maintaining efficient processing of valid signals.
Solution Approach 2:
The system changes the parameter of signal selection by introducing reception quality comparison as an additional criterion. Instead of using all available signals, the system dynamically adjusts signal inclusion based on reception quality parameters, excluding signals that show abnormal quality patterns compared to other terminals receiving the same satellite signals.
Data Source
AI summary
The present application: receives positioning data from each of a plurality of positioning terminals that have received positioning signals transmitted from a plurality of satellites; uses the received positioning data to detect, for each satellite, the difference between the positioning signal reception quality at a first positioning terminal and the positioning signal reception quality at at least one second positioning terminal; and uses the difference for each satellite to determine a satellite to be used for positioning computation for the first positioning terminal.