EVM Requirement Negotiation for Wireless Ranging Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ranging and positioning technologies in wireless communications face a trade-off between signal quality and transmission range, where higher signal quality improves accuracy but reduces range, and lower signal quality increases range but decreases accuracy, without an effective method to manage this balance.
Innovation Solution
Implementing an error vector magnitude (EVM) requirement negotiation phase between electronic devices to dynamically control EVM levels, allowing devices to adjust signal quality based on the desired accuracy and range for ranging operations, enabling more precise positioning and distance determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If higher signal quality is used for ranging operations, then positioning accuracy is improved, but transmission range is reduced
Solution Approach 1:
The patent implements dynamic EVM requirement negotiation where the required EVM level is not fixed but is determined through interaction between devices. The initiating device proposes an EVM requirement, and the responding device negotiates based on its capabilities and the desired ranging accuracy, allowing the system to adaptively adjust signal quality requirements rather than using a static threshold
Solution Approach 2:
The patent changes the parameter of EVM requirement from a fixed system parameter to a negotiable parameter that can be adjusted based on specific ranging needs. By introducing EVM requirement indication fields in request and response frames, the system allows flexible parameter adjustment to balance between accuracy and range according to the specific application scenario
2Length of stationary object
If lower signal quality is used for ranging operations, then transmission range is improved, but positioning accuracy is reduced
Solution Approach 1:
The system dynamically determines the appropriate EVM requirement level through negotiation rather than using a fixed low threshold. The responding device evaluates its own capabilities and the requested accuracy level, then negotiates an appropriate EVM requirement that maximizes range while maintaining sufficient accuracy for the application
Solution Approach 2:
The patent implements feedback mechanisms where the responding device receives the EVM requirement indication, evaluates its capability to meet that requirement, and responds with negotiation information. This feedback loop allows the system to adjust the EVM requirement based on actual device capabilities and environmental conditions, preventing unnecessarily low accuracy requirements while maximizing transmission range
Data Source
AI summary
Some embodiments of this disclosure include apparatuses and methods for implementing a requirement negotiation for an error vector magnitude (EVM) (or other metrics for measuring transmission signal quality) for ranging and/or positioning operation(s). Some embodiments relate to an electronic device including a transceiver and one or more processors communicatively coupled to the transceiver. The one or more processors transmit, during a negotiation phase of a ranging operation, an initial request frame to a second electronic device, wherein the initial request frame comprises a first indication of an error vector magnitude (EVM) requirement. The one or more processors receive an initial response frame from the second electronic device and determine a second indication of the EVM requirement based at least in part on the received initial response frame. The one or more processors implement a measurement phase of the ranging operation in accordance with the second indication of the EVM requirement.