Touch-Detected Transmit Power Adjustment for Wireless Signal Quality
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Solution Overview
Problem
User interference with Bluetooth signals due to finger contact causes signal attenuation and degradation, leading to reduced signal quality and data loss, which current power control mechanisms fail to address promptly.
Innovation Solution
Implementing touch sensors to detect user input and immediately increase transmission power to counteract signal interference, adjusting power levels based on the extent and duration of finger contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power is increased to counteract signal interference from finger contact, then signal quality is maintained, but battery life is reduced
Solution Approach 1:
The system dynamically adjusts transmission power based on real-time detection of finger contact. When a finger is detected contacting the device surface, the transmission power is immediately increased to compensate for signal attenuation. When no finger contact is detected, the power returns to normal levels. This dynamic adaptation resolves the contradiction by only consuming extra energy when actually needed to maintain signal quality.
Solution Approach 2:
The system implements a feedback mechanism using touch sensors to detect finger contact and automatically triggers power adjustment. The sensor continuously monitors the device surface, and when interference is detected, the system responds by increasing transmission power. This closed-loop feedback system ensures signal quality is maintained only when necessary, avoiding unnecessary energy consumption and preserving battery life.
2Loss of information
If transmission power is increased immediately upon finger detection, then data loss is prevented, but energy consumption increases
Solution Approach 1:
The system performs preliminary detection using touch sensors to identify finger contact before signal degradation occurs. Upon detecting the finger contact, the system immediately increases transmission power in advance of potential data loss. This preliminary action prevents data loss while minimizing energy consumption by only activating high-power mode when actually needed, rather than continuously.
Solution Approach 2:
The system applies preliminary anti-action by detecting finger contact and preemptively increasing transmission power to counteract the upcoming signal attenuation. This prevents the harmful effect (data loss) before it can occur, while avoiding unnecessary energy consumption by not maintaining high power during normal operation.
3Reliability
If touch sensors are added to detect finger contact, then signal interference can be compensated, but device complexity increases
Solution Approach 1:
The touch sensor serves multiple functions: it detects user input for device control and simultaneously detects finger contact that causes signal attenuation. By making the sensor multi-functional, the system avoids adding dedicated hardware solely for interference detection, thereby minimizing the increase in device complexity while still achieving reliable signal quality compensation.
Solution Approach 2:
The existing touch sensor infrastructure of the device is leveraged to serve the additional function of detecting signal-interfering finger contact. The sensor already present for user interaction automatically provides interference detection capability, eliminating the need for separate dedicated detection hardware and reducing overall device complexity.
Data Source
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AI summary
Attenuation of a wireless signal, particularly a short range wireless pairing signal, is accommodated immediately and automatically by a device in response to detection of presence of an object. When a user provides input to the device, such as by touching the device with a finger, presence of the finger may interfere with a signal emitted from the device. To accommodate for such interference, the device may immediately increase its transmission power upon detection of the finger, without waiting for link quality measurements.