Multi-Antenna Power Control via SAR Channel Range Encoding
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Solution Overview
Problem
In multi-antenna scenarios, the increased number of antennas leads to significant data processing pressure on the processor due to the need to monitor and adjust the power of each antenna, which affects SAR values and human health.
Innovation Solution
An antenna power control method that uses a first sensor to detect the status of multiple detection channels, encapsulating these statuses into a range value, which is then used by a processor to control the transmit power of the antennas, reducing the data processing load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are used to improve communication capability, then communication capability is improved, but data processing pressure on the processor increases
Solution Approach 1:
A first driving module is introduced as an intermediary between the sensor and the processor. The driving module receives detection channel status data from the sensor, processes it locally to determine antenna capacitance values, and only transmits the final results to the processor. This intermediary layer filters and pre-processes data, reducing the burden on the processor while maintaining multi-antenna functionality.
Solution Approach 2:
The data processing function is segmented into two parts: initial data acquisition and processing by the sensor and driving module, and final decision-making by the processor. The driving module handles the complex task of interpreting detection channel statuses and calculating capacitance values, while the processor focuses on higher-level control decisions based on the driving module's outputs.
2Measurement precision
If detection channel statuses are transmitted individually to the processor, then processing accuracy is maintained, but data processing pressure increases
Solution Approach 1:
The driving module merges multiple detection channel status data into a single comprehensive result (antenna capacitance value). Instead of transmitting individual status bits for each detection channel to the processor, the driving module combines this information and transmits only the final capacitance determination, reducing data volume while preserving measurement accuracy.
Solution Approach 2:
The driving module performs preliminary processing of detection channel statuses before data reaches the processor. By pre-calculating the antenna capacitance values and filtering out redundant information in advance, the system reduces the amount of data the processor must handle while ensuring accurate measurements are preserved.
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
The method effectively reduces data processing pressure on the processor by encapsulating detection channel statuses into a range value, allowing precise control of antenna power with high accuracy and compatibility across different sensor configurations.
Implementation Method 1
A smaller distance between the antenna and the human body indicates a larger value of capacitance between the antenna and the human body. A specific absorption rate sensor (SAR Sensor) can detect the capacitance between the antenna and the human body
Data Source
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AI summary
Embodiments of this application disclose an antenna power control method and an electronic device, which can reduce data processing pressure on a processor in the electronic device in a multi-antenna scenario. The specific solution is: obtaining, by a first sensor, statuses of at least two detection channels, where each of the detection channels corresponds to one status, the status is any one of a first state and a second state, the first state indicates that a value of capacitance between an antenna corresponding to the detection channel and a human body is greater than a first threshold, and the second state indicates that the value of the capacitance between the antenna corresponding to the detection channel and the human body is less than the first threshold; determining, by a first driving module, a first range value based on the statuses of the at least two detection channels; and controlling, by the processor, transmit power of the at least two antennas based on the first range value.