Antenna Signal Link Gain Adaptation via Terminal Power Feedback
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Solution Overview
Problem
Existing antenna signal link compensation technologies fail to adaptively adjust the gain factor to varying attenuation in mobile radio terminal antenna links, especially in electromagnetic capacitive or inductive coupling scenarios, leading to suboptimal signal quality.
Innovation Solution
A circuit arrangement with a control unit that detects changes in antenna signal power and adjusts the gain factor based on the mobile radio terminal's response to power control, allowing for adaptive compensation of coupling attenuation without external information or elaborate surveys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a predetermined constant gain factor is used for compensation, then the device complexity is reduced, but the adaptability to varying coupling attenuation deteriorates
Solution Approach 1:
The system uses the mobile radio terminal's own power control response as feedback to automatically determine the required gain factor, eliminating the need for external surveying equipment or complex attenuation measurement circuits. The terminal itself provides the information needed for compensation through its transmit power adjustments.
Solution Approach 2:
The invention implements a feedback mechanism where the control unit monitors changes in transmit signal power in response to gain factor changes, and uses this feedback to iteratively adjust the gain factor until optimal compensation is achieved. This closed-loop approach enables adaptive compensation without increasing device complexity.
2Measurement precision
If elaborate surveying of coupling attenuation is performed, then the measurement precision of attenuation is improved, but the productivity of the compensation process deteriorates
Solution Approach 1:
The mobile radio terminal's existing power control mechanism serves the dual purpose of both signal transmission and attenuation measurement. By observing how the terminal adjusts its power in response to gain changes, the system obtains precise attenuation information without requiring separate measurement procedures.
Solution Approach 2:
The system changes the gain factor parameter and observes the resulting changes in transmit signal power to infer attenuation characteristics. This parameter-based approach allows rapid determination of coupling conditions without physical surveying or complex measurements.
3Adaptability or versatility
If access to mobile radio terminal information is required, then the adaptability of gain factor adjustment is improved, but the ease of operation deteriorates
Solution Approach 1:
The system uses publicly available feedback from the terminal's power control responses rather than requiring access to proprietary terminal information. The control unit simply observes whether the terminal increases or maintains its transmit power in response to gain changes, providing sufficient information for adaptation without complex interfaces.
Data Source
AI summary
A circuit arrangement for compensating for an attenuation occurring in an antenna signal link between a mobile radio terminal and an antenna has at least one antenna signal amplifier in the antenna signal link and a control unit for adjusting a gain factor. The antenna signal conducted through an associated antenna signal amplifier is amplified or attenuated. The circuit arrangement has a detection unit for detecting an antenna signal power (PM, PA) of the antenna signal in the signal path of the antenna signal link. The control unit is configured for changing the gain factor, detecting a change, changing the transmit power (PM) of the mobile radio terminal, and adapting the gain factor to the coupling attenuation of the antenna signal link in dependence on a detected response of the mobile radio terminal.