Antenna Occlusion Correction for Location Accuracy
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Solution Overview
Problem
User devices, such as smartphones and tablets, face inaccuracies and unreliability in location determination due to antenna occlusion, which occurs when signals are blocked by fingers or conductive surfaces, leading to unreliable signal strength measurements.
Innovation Solution
The user device detects antenna occlusion by analyzing changes in received signal strength indicators (RSSI) over time, calculates a correction factor, and applies it to the RSSI measurements to improve location accuracy, using techniques like statistical analysis and slew rate comparison to identify occlusion and de-occlusion events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user device uses antennas to receive communication signals for location determination, then location determination can be performed, but the antennas may become occluded by fingers or conductive surfaces leading to unreliable signal strength measurements
Solution Approach 1:
The system performs preliminary actions by continuously monitoring RSSI values and detecting occlusion events before they significantly degrade location determination accuracy. The device establishes baseline RSSI characteristics and proactively identifies when occlusion occurs, allowing it to correct measurements in advance of severe positioning errors.
Solution Approach 2:
The system implements feedback by continuously monitoring RSSI values, comparing them against expected patterns, and using this information to detect occlusion events. The detected occlusion status feeds back into the location determination process, allowing the system to adjust its measurements and compensate for antenna blockage in real-time.
2Measurement precision
If the device applies correction factors to RSSI measurements to account for antenna occlusion, then location accuracy improves, but the complexity of the location determination process increases
Solution Approach 1:
The system applies parameter changes by modifying RSSI measurements through correction factors when occlusion is detected. Instead of fundamentally changing the location determination architecture, it adjusts the signal strength parameter dynamically based on occlusion detection, maintaining simplicity while improving accuracy.
Solution Approach 2:
The correction factor acts as an intermediary between the raw RSSI measurement and the final location calculation. This intermediary element allows the system to compensate for antenna occlusion effects without requiring complete redesign of the location determination process, bridging the gap between imperfect measurements and accurate positioning.
Data Source
AI summary
Systems and methods for receiving a plurality of wireless communication signals and identifying an antenna occlusion condition from the received plurality of wireless communication signals is disclosed. A correction factor may be determined based at least in part on determined signal strength corresponding to each of the received wireless communication signals. The correction factor may be used to determine a location based at least in part on the signal strength corresponding to each of the received communication signals and the determined correction factor.