Transmit Power Control Signal Path Assignment
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Solution Overview
Problem
Mobile telecommunications devices face challenges in achieving accurate transmit power control due to variations in transmitter gain caused by frequency, temperature, voltage, and fabrication tolerances, leading to potential interference and power consumption issues.
Innovation Solution
A transmit power control method and system that assigns one signal path for both gain adjustments and power measurements within a time slot to prevent additional gain errors, and determines signal path switching between adjacent time slots based on power requirements and gain thresholds to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If multiple signal paths are switched during gain adjustments and power measurements in the same time slot, then power consumption can be optimized, but additional gain errors are introduced
Solution Approach 1:
The time slot is segmented into distinct phases: a first time period for first gain adjustment and first power measurement using a first signal path, and a second time period for second gain adjustment and second power measurement using the same first signal path. This segmentation ensures that measurements are taken during stable signal path conditions, preventing additional gain errors while still allowing power optimization by selecting appropriate signal paths for different time slots.
Solution Approach 2:
The signal path is predetermined and assigned before the gain adjustments and power measurements are performed. By establishing the signal path assignment in advance (the same first signal path is assigned for both the first and second gain adjustments), the system avoids dynamic switching during measurements, thereby maintaining measurement precision while still enabling power consumption optimization through strategic signal path selection between time slots.
2Use of energy by moving object
If signal paths are switched between adjacent time slots, then power consumption is reduced, but gain errors may occur during transitions
Solution Approach 1:
Adjacent time slots are segmented into distinct measurement phases where each slot's first and second gain adjustments and power measurements are performed using the same signal path. This segmentation isolates the gain error impacts to specific time periods and allows for compensation, ensuring that power consumption is optimized through inter-slot signal path switching while maintainings transmit power control accuracy within each time slot.
Solution Approach 2:
The system performs both first and second power measurements within each time slot using the same signal path to establish accurate baseline measurements. These measurements provide feedback that enables the system to compensate for any gain errors introduced during signal path transitions between time slots, thereby maintaining reliability and transmit power control accuracy while still achieving power consumption reduction through strategic switching.
Data Source
AI summary
A method of transmit power control in a mobile telecommunications device is provided. One of a plurality of signal paths providing different output power and different gains is assigned in a first gain adjustment and a first power measurement in a current time slot. The same one of the signal paths is assigned in at least a second gain adjustment and a second power measurement in the same current time slot.