mmW Transceiver MPE Compliance via Radar Object Classification
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Solution Overview
Problem
Next-generation wireless communication systems, such as 5G, face challenges in balancing high-frequency signal transmission power with regulatory RF exposure limits, particularly in compensating for path loss while ensuring maximum permissible exposure (MPE) compliance, especially in devices with cost and size constraints.
Innovation Solution
Incorporating a wireless communication device with a transceiver that uses millimeter-wave signaling for both communication and proximity detection, employing radar-based techniques to classify nearby objects and adjust transmission parameters, such as power levels, based on object classification to maintain MPE compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmit power levels are increased to compensate for path loss in mmW signals, then communication performance is improved, but MPE compliance deteriorates
Solution Approach 1:
The system dynamically adjusts transmit power levels based on real-time proximity detection of human subjects. The transceiver continuously monitors object distance and modifies transmission parameters accordingly, enabling high power when safe and reduced power when subjects are nearby, thus resolving the contradiction between maintaining communication performance and ensuring MPE compliance
Solution Approach 2:
The system implements a feedback loop where proximity detection results from radar-based sensing inform transmit power adjustments. The transceiver receives feedback about human subject proximity and automatically modulates transmission power to maintain both communication effectiveness and regulatory compliance
2Productivity
If beamforming concentrates energy in a particular direction to compensate for path loss, then communication performance is improved, but MPE compliance deteriorates
Solution Approach 1:
The system dynamically controls beamforming parameters based on detected human subject locations. When subjects are detected in specific directions, the system adjusts beam direction and concentration in real-time, directing high-gain beams away from subjects while maintaining communication links, thus achieving both performance and compliance
3Object-affected harmful factors
If additional sensors are added to detect human proximity for MPE compliance, then MPE compliance is improved, but device complexity increases
Solution Approach 1:
The system uses the existing mmW transceiver for dual purposes: both wireless communication and human proximity detection. The same antenna and signal processing infrastructure serves both functions, eliminating the need for separate sensor systems and reducing overall device complexity while maintaining MPE compliance capability
Solution Approach 2:
The system merges the communication transceiver and proximity detection functions into a single integrated system. By combining these functions, the patent avoids adding separate sensor modules, thereby maintaining MPE compliance monitoring without increasing device complexity
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
Enables real-time adjustment of transmission parameters to ensure compliance with MPE regulations, optimizing power usage and device performance while reducing the need for additional bulky sensors, thereby enhancing safety and efficiency in wireless communication devices.
Implementation Method 1
A transceiver can also leverage mmW signaling to detect objects
Implementation Method 2
receiving a reflection signal reflected from the target object
Data Source
AI summary
Aspects of the disclosure relate to classifying a target object. An electronic device may transmit a detection signal and receive a reflection signal reflected from the target object. The electronic device then determines, based on one or more features of the reflection signal, a category of the target object and adjusts at least one transmission parameter based on the category. The electronic device then transmits an adjust signal using the transmission parameter. Other aspects, embodiments, and features are also claimed and described.