Wireless Power Beacon Detection Using Background Signal Signatures

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Solution Overview

Problem

Wireless power transmitters (WPTs) face challenges in detecting and processing beacon signals from receiver devices due to interference from background signals and noise in multi-signal environments, leading to inefficient power delivery and potential misdirection of wireless power.

Innovation Solution

The technology enables WPTs to detect and characterize background signals and interfering noise to establish a blocker/interferer signal signature, allowing for the cancellation of these interfering components and the effective detection of beacon signals. This is achieved by processing incoming RF signals and determining a background signature during periods when the WPT is not transmitting or receiving signals from associated receiver devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If WPTs operate in multi-signal environments with background signals present, then wireless power delivery can be maintained, but beacon signal detection is interfered with and power delivery efficiency deteriorates

Engineering Contradiction:

Improvewireless power delivery efficiencyVSAvoidbackground signal interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary characterization of background signals during idle periods before actual power delivery begins. By pre-establishing a background signature model, the WPT is prepared to subtract these interfering signals during beacon detection, improving detection accuracy without sacrificing power delivery time

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system converts the harmful background interference into a useful characteristic by characterizing and storing the background signature. This previously harmful interference becomes a reference model that can be subtracted during signal processing, transforming the problem into a solution where the interference pattern itself aids in identifying legitimate beacon signals

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Measurement precision

If time-sharing approach is used to avoid background signal interference, then beacon detection accuracy is improved, but duty cycle for power delivery is reduced

Engineering Contradiction:

Improvebeacon signal detection accuracyVSAvoidduty cycle for power delivery

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

Background signal characterization is performed during idle periods or gaps in the power delivery schedule, preparing the system in advance. This preliminary modeling of interference patterns allows the system to maintain high detection accuracy during active power delivery without requiring additional time for background analysis

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The background signature characterization is implemented as a continuous or near-continuous process that occurs during idle periods without interrupting the power delivery cycle. This allows the system to maintain uninterrupted power delivery to receivers while simultaneously building an accurate model of background interference for improved beacon detection

Inventive Principle:

Principle #20Continuity of useful action

3Reliability

If WPT continuously processes signals to detect beacons, then detection reliability is improved, but computational resources and power consumption increase

Engineering Contradiction:

Improvebeacon signal detection reliabilityVSAvoidcomputational resource consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system pre-characterizes background signals during idle periods when computational resources can be dedicated to this task without impacting real-time power delivery operations. This preliminary modeling reduces the computational burden during critical beacon detection phases

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The WPT system uses its own idle periods and operational gaps to perform background characterization autonomously. During periods when no power delivery is occurring, the system automatically collects and analyzes background signal data, making the system self-sufficient in maintaining detection reliability without external intervention or additional resource allocation

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12322981B2Systems and methods for wireless signaling operations in multi-signal environments

Publication Date: 2025.06.03 OSSIA INC

AI summary

Systems, methods and computer-readable media according to the present technology enable a receiver to detect and characterize background signals and/or interfering noise to establish a blocker/interferer signal signature, or background signature, for a multi-signal wireless signaling environment. The processes and methods according to present technology can be implemented as a continuous process. Alternatively, where a transmitter and associated receiver operate for wireless signaling according to an expected or predetermined schedule, the processes described herein need not run at all times, but rather can be scheduled for only such times and durations sufficient to achieve the advantageous technical effects. In either case, the present technology provides a power-, memory-, and computation-efficient technique for both the transmitter and the receiver devices.