Multi-Antenna TER Control for Communication Power Management
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Solution Overview
Problem
Electronic devices face a challenge in maintaining communication performance while adhering to Total Exposure Ratio (TER) value regulation conditions, which limit electromagnetic radiation to ensure safety, often requiring reduced transmit power.
Innovation Solution
The electronic device employs a communication processor that calculates TER values using an influence matrix with coefficients representing the impact of RF signal transmission across multiple antennas, adjusting transmit power limits and settings to optimize communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmit power is reduced to satisfy TER value regulation conditions, then harmful electromagnetic radiation is reduced, but communication performance deteriorates
Solution Approach 1:
The patent implements dynamic transmit power adjustment by continuously monitoring TER values and adapting power levels in real-time. The system transitions from static power reduction to dynamic power management, allowing the device to maintain higher power when TER conditions permit while reducing power when conditions are violated, thus resolving the contradiction between safety compliance and communication performance
Solution Approach 2:
The system changes the power parameter dynamically based on TER measurement results. By adjusting transmit power levels according to measured TER values and influence matrix calculations, the system optimizes the balance between electromagnetic exposure reduction and maintaining adequate communication performance
2Reliability
If transmit power is reduced to satisfy TER value regulation conditions, then TER compliance is improved, but power transmission capability deteriorates
Solution Approach 1:
The patent applies local quality by calculating individual TER values and influence coefficients for each antenna element. Instead of uniform power reduction across all antennas, the system adjusts power levels locally for each antenna based on its specific contribution to total exposure, allowing selective power transmission that maintains compliance while preserving capability where possible
Solution Approach 2:
The system segments the power transmission control by antenna element, calculating separate TER contributions and influence coefficients for each antenna. This segmentation enables independent power adjustment for each antenna, optimizing the balance between compliance and transmission capability on a per-antenna basis rather than applying blanket power reduction
Data Source
AI summary
According to an aspect of the inventive concept, an electronic device includes a transmitter including a plurality of antennas, and a communication processor for calculating a total exposure ratio (TER) value of each of the plurality of antennas, wherein the communication processor includes an antenna index buffer for storing a used antenna index, which is an index of one or more used antennas from among the plurality of antennas used in each window, a used power buffer for storing used power of an antenna corresponding to the used antenna index, and a controller configured to calculate the TER value based on the used antenna index, the used power, and an influence matrix.