Interference Cancellation in Wireless Power Data Communication

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Solution Overview

Problem

Wireless power transmission can interfere with data communication signals, leading to deterioration in communication performance due to the use of relatively high transmission power.

Innovation Solution

An electronic device equipped with a communication circuit and a processor that receives a beacon signal from a wireless power transmission device, estimates the channel information, and subtracts the interference signal from the data communication signal based on the power signal's transmission intensity and complex number information to decode the signal effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If wireless power transmission is performed using relatively high transmission power, then power transmission efficiency is improved, but data communication performance deteriorates due to interference

Engineering Contradiction:

Improvepower transmission efficiencyVSAvoiddata communication performance

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent converts the harmful interference signal from wireless power transmission into a useful component for interference cancellation. By estimating the interference signal based on power signal information and channel state information, the system subtracts this estimated interference from the received data signal, thereby eliminating the harmful effect and improving data communication performance while maintaining high power transmission efficiency

Inventive Principle:

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

Solution Approach 2:

The patent performs preliminary estimation of the interference signal before data decoding. By receiving power signal information in advance, estimating channel state information, and calculating the interference signal characteristics beforehand, the system prepares the interference cancellation parameters prior to actual data reception, enabling effective interference removal without compromising power transmission efficiency

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3787247B1Electronic device for removing, from data communication signal, interference due to wireless power and operating method therefor

Publication Date: 2023.06.14 SAMSUNG ELECTRONICS CO LTD

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AI summary

According to various embodiments, an electronic device comprises: a communication circuit for receiving a data communication signal including an interference signal by means of a power signal generated by a wireless power transmission device; and at least one processor, wherein the at least one processor can be configured to receive information related to the power signal from the wireless power transmission device through the communication circuit, estimate information about a channel with the wireless power transmission device, and use the communication circuit so as to remove, before decoding the data communication signal, the interference signal from the data communication signal on the basis of the information related to the power signal and the information about the channel. Other various embodiments are possible.