RF Sensing Calibration Compensation for Tracking Accuracy
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately calibrating radio frequency for sensing (RF-S) measurement information, particularly in ensuring proper calibration of TX/RX sensing nodes, which affects the accuracy and latency of tracking functions in various applications.
Innovation Solution
A method and system for determining RF-S calibration compensations based on measurement information and attributes associated with a RF-S calibration target, allowing for improved calibration of wireless sensing nodes and enhanced tracking accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional RF-S calibration procedures are used, then the calibration process can be completed with existing methods, but the measurement precision and tracking accuracy are insufficient
Solution Approach 1:
The patent applies preliminary action by performing RF-S calibration procedures before actual sensing operations. A calibration target is positioned at a known location, and calibration measurements are taken beforehand to establish reference data. This pre-calibration step compensates for RF imperfections in TX/RX nodes before real tracking begins, improving measurement accuracy without affecting real-time operation reliability.
Solution Approach 2:
The patent uses a calibration target as an intermediary object between the TX/RX sensing nodes and the actual objects of interest. This calibration target with known attributes serves as a mediator to establish reference measurements, allowing the system to calculate calibration compensations that improve subsequent measurement accuracy without directly measuring the target objects during calibration.
2Measurement precision
If complex calibration procedures are implemented to improve accuracy, then measurement precision improves, but the processing time and latency increase
Solution Approach 1:
The calibration procedure is performed in advance before real tracking operations begin. By completing the calibration phase beforehand, the system establishes reference measurements and calculates compensations offline, avoiding time-critical processing during actual tracking. This reduces latency in real-time operations while maintaining high measurement precision through the pre-computed calibration data.
Solution Approach 2:
The patent implements feedback by using calibration measurements to calculate compensation values that are applied to subsequent tracking measurements. The system measures the calibration target, compares expected versus actual measurements, computes compensation factors, and applies these to correct future measurements. This feedback loop improves tracking accuracy without requiring continuous complex processing during real-time operation.
3Ease of operation
If RF-S calibration is performed without proper compensation mechanisms, then the system operates with simpler procedures, but the tracking function accuracy deteriorates
Solution Approach 1:
The calibration target acts as an intermediary that simplifies the calibration process while improving accuracy. By using a target with known, simple attributes (position, reflectivity), the system can perform straightforward measurements and calculations. The intermediary target converts complex RF calibration problems into simple comparison tasks between expected and measured values, maintaining operational simplicity while achieving high precision through the compensation mechanism.
Solution Approach 2:
The patent replaces complex mechanical or manual calibration adjustment mechanisms with computational compensation. Instead of physically adjusting TX/RX node parameters through complex mechanical systems, the system uses software-based compensation calculations applied to measurement data. This substitution maintains ease of operation while achieving high accuracy through mathematical corrections rather than physical adjustments.
Data Source
AI summary
Disclosed are techniques for sensing calibration. In an aspect, a communications device obtains a set of attributes associated with a radio frequency for sensing (RF-S) calibration target, obtains measurement information associated with a RF-S calibration procedure between a first set of wireless sensing nodes and the RF-S calibration target, and determines a set of RF-S calibration compensations based on the measurement information and the set of attributes. In another aspect, a communications device determines a location of a target object based on the set of RF-S calibration compensations.