TDD Multi-Antenna Signal Control for SAR and Hardware Interference
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Solution Overview
Problem
Electronic devices malfunction due to high-strength wireless signals radiated from antennas, which can cause interference with internal hardware components and fail to meet specific absorption rate (SAR) standards.
Innovation Solution
An electronic device with circuitry and multiple antennas adaptively controls wireless signal strength by identifying aggressor antennas and adjusting signal levels based on reference strengths and time-averaged SAR algorithms to prevent malfunction and comply with SAR standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the strength of electromagnetic waves is increased to improve communication performance, then the communication quality is improved, but the SAR value increases causing harm to the human body and hardware malfunction
Solution Approach 1:
The patent applies dynamics by making the antenna system adaptable and adjustable. The electronic device dynamically selects between multiple antennas based on real-time conditions (SAR values, communication quality, operational state) and adjusts the transmission signal strength dynamically. This is evident in the processor's ability to switch between first and second antennas and to adjust signal strength based on detected SAR values and communication conditions, transforming a static antenna system into a dynamic one that responds to changing environmental and operational parameters.
Solution Approach 2:
The patent changes physical parameters to resolve the contradiction. Specifically, it adjusts the transmission signal strength parameter based on detected SAR values and communication quality metrics. The system also changes which antenna is active (switching between first and second antennas) and modifies operational modes (such as switching between full signal strength and reduced signal strength) based on the detected parameters, thereby optimizing the balance between communication quality and SAR compliance.
2Object-affected harmful factors
If the strength of electromagnetic waves is reduced to satisfy SAR standards, then the harm to the human body is minimized, but the communication quality deteriorates
Solution Approach 1:
The system dynamically adjusts signal strength rather than using a fixed reduced level. When SAR values indicate safety, the system can operate at full signal strength for optimal communication. When SAR values exceed thresholds, the system dynamically reduces signal strength only for the affected antenna while maintaining full strength on other antennas, thereby minimizing communication quality impact while ensuring SAR compliance.
Solution Approach 2:
The patent segments the antenna system into multiple independent antennas (first antenna and second antenna) that can be controlled independently. This allows the system to reduce signal strength on only the antenna causing SAR issues while maintaining full signal strength on other antennas, rather than reducing all signals uniformly. This segmentation enables selective signal reduction that preserves overall communication quality.
3Reliability
If multiple antennas are used to improve communication reliability, then the communication coverage is enhanced, but the complexity of signal strength control increases
Solution Approach 1:
The patent divides the antenna system into separate, independently controllable segments (first antenna and second antenna). Each antenna can be controlled independently in terms of signal strength adjustment and operational state switching. This segmentation simplifies the control logic by allowing the processor to manage each antenna separately based on its specific SAR contribution and communication performance, rather than managing all antennas as a single complex unit.
Solution Approach 2:
The system implements feedback mechanisms where the processor continuously detects SAR values, communication quality metrics, and antenna operational states, then uses this feedback to adjust signal strength and antenna selection in real-time. The processor receives feedback about the current state (SAR levels, communication quality, antenna status) and automatically adjusts the transmission parameters accordingly, reducing the need for complex manual control while maintaining optimal performance.
4Stability of the object's composition
If the signal strength is dynamically adjusted to prevent hardware malfunction, then the operational stability is improved, but the control mechanism becomes more complex
Solution Approach 1:
The patent employs feedback control where the processor continuously monitors SAR values, communication quality, and antenna operational states, then automatically adjusts signal strength and antenna selection based on this feedback. The system detects when SAR values exceed thresholds or when hardware malfunction is imminent, and automatically responds by reducing signal strength or switching antennas, thereby maintaining operational stability through closed-loop control rather than complex open-loop mechanisms.
Solution Approach 2:
The system performs self-adjustment and self-protection by automatically detecting harmful conditions and correcting them without external intervention. The processor autonomously monitors SAR levels and communication quality, identifies when signal strength adjustment is needed, and executes the adjustment independently. This self-service capability simplifies the overall control architecture by eliminating the need for external control systems while maintaining operational stability.
Data Source
AI summary
An electronic device includes at least one hardware element, a wireless communication circuit that supports time division duplexing (TDD) communication, a plurality of antennas, a processor, and a memory storing reference strength information. The processor may be configured to identify a victim in operation in the at least one hardware element, and identify at least one first antenna operating as an aggressor against the victim in the plurality of antennas. When the at least one first antenna transmits a wireless signal, the processor may be configured to identify a ratio of uplink symbols for a specified time period, identify a first reference strength based on the ratio, identify a second reference strength based on the reference strength information, and transmit the wireless signal based on a result of comparing the first reference strength with the second reference strength.