Multi-Antenna Power Allocation Using Residual SAR Under TER Limits
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic devices face a challenge in maintaining optimal communication performance while adhering to total exposure ratio (TER) regulatory conditions, as reducing transmission power to meet these conditions can degrade communication performance.
Innovation Solution
An electronic device with multiple antennas and a processing circuitry system that calculates residual specific absorption ratio (SAR) values based on used antenna indices and power consumption, adjusting transmission power to each antenna to minimize performance loss while meeting TER regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmission power is reduced to meet TER value regulatory condition, then harmful effects of electromagnetic waves are reduced, but communication performance deteriorates
Solution Approach 1:
The patent dynamically adjusts transmission power parameters based on SAR values and antenna correlation matrices. By changing power allocation parameters adaptively rather than using fixed reduced power, the system meets TER regulations while optimizing communication performance through parameter optimization.
Solution Approach 2:
The system implements dynamic power allocation that adjusts transmission power in real-time based on current antenna usage patterns and SAR measurements. This dynamic approach allows the system to maximize power within regulatory limits rather than using static reduced power levels, thereby maintaining communication performance.
2Power
If transmission power is reduced to meet TER value regulatory condition, then TER value regulatory condition is satisfied, but communication performance deteriorates
Solution Approach 1:
The patent optimizes transmission power parameters by calculating residual SAR values and using antenna correlation matrices to determine optimal power allocation. This parameter optimization allows achieving the maximum permissible transmission power within TER limits, preventing performance degradation from excessive power reduction.
3Reliability
If transmission power is increased to improve communication performance, then communication performance is improved, but TER value regulatory condition is violated
Solution Approach 1:
The system employs feedback mechanisms by continuously monitoring SAR values and adjusting transmission power accordingly. The calculated residual SAR values provide feedback that enables the system to increase power up to regulatory limits without violation, optimizing performance while ensuring compliance.
Solution Approach 2:
The patent implements dynamic power control that adapts transmission power levels in real-time based on current exposure conditions and antenna usage. This dynamic adjustment allows the system to operate at maximum permissible power levels rather than fixed conservative limits, improving performance while maintaining regulatory compliance.
Data Source
AI summary
An electronic device includes a plurality of antennas, an antenna index buffer configured to store a used antenna index indicating at least one antenna among the plurality of antennas used in each of a plurality of windows, a used power buffer configured to store power consumption of an antenna corresponding to the used antenna index, and processing circuitry configured to calculate a residual specific absorption ratio (SAR) value of each of the plurality of antennas based on the used antenna index, the power consumption and a correlation matrix, and assign transmission power to each of transmitting antennas based on the residual SAR and an operation mode, the transmitting antennas being among the plurality of antennas.