Dynamic Channel Selection for Radar Proximity Sensing

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing proximity sensing technologies in electronic devices, such as laptops, face challenges in accurately detecting user presence due to inadequate antenna isolation, which can lead to interference and reduced sensitivity in Wi-Fi channels, affecting the performance of active radar Wi-Fi sensing.

Innovation Solution

Implementing an algorithm that sweeps through available Wi-Fi channels to measure isolation and selects the channel with the highest isolation for active radar Wi-Fi sensing, ensuring sufficient antenna separation to enhance proximity detection accuracy and user experience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If Wi-Fi channels are used for proximity sensing, then sensing functionality is provided, but antenna isolation is insufficient causing interference

Engineering Contradiction:

Improveproximity detection accuracyVSAvoidantenna interference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the operating parameter from fixed Wi-Fi channel to dynamic channel selection by measuring isolation metrics across multiple channels and selecting the optimal channel for radar sensing operations

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system performs continuous measurement of antenna isolation through signal transmission and reception, using the feedback information to determine the best channel for sensing operations

Inventive Principle:

Principle #23Feedback

2Measurement precision

If antenna isolation is increased to reduce interference, then sensing accuracy improves, but device complexity increases

Engineering Contradiction:

Improveisolation measurement accuracyVSAvoidchannel sweeping algorithm

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The system uses the device's own existing Wi-Fi antenna structure to perform isolation measurements without requiring additional dedicated sensing hardware, making the complex measurement process self-contained

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach improves the accuracy of proximity detection by maintaining high antenna isolation, resulting in better user experience and meeting key performance indicators for Wi-Fi sensing, even in varying environments and device configurations.

Implementation Method 1

perform radar detection over the channel having highest isolation

Methodology Applied

Scientific EffectRadar: Radar

Implementation Method 2

measure isolation in a plurality of communication channels

Methodology Applied

Scientific EffectElectromagnetic interference: Interference

Data Source

PatentUS20240223342A1Choosing a channel for proximity sensing in a user device

Publication Date: 2024.07.04 INTEL CORP

AI summary

Described herein is an apparatus having at least two antennas to communicate over multiple communication channels. The apparatus can further include processing circuitry coupled to the at least two antennas to measure isolation in the communication channels while the communication channels are operating in a radar mode to select a channel having highest isolation among the communication channels. The processing circuitry can further perform radar detection over the channel having highest isolation. Other systems and methods are described.