Individual Carrier Power Detection in Aggregated RF Output
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Solution Overview
Problem
Advanced-LTE carrier aggregation systems face challenges in maintaining total carrier power within specified limits due to the need for precise power control of multiple carriers transmitted simultaneously, which is not effectively addressed by existing technologies.
Innovation Solution
A system that includes RF sources with power amplifiers, a transmission output configured to provide a carrier aggregated signal, and a directional coupler to provide an indication of RF power for each individual carrier, allowing for accurate power detection and control of each carrier to maintain total power within specified limits, using frequency multiplexing circuits and band select switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is used to increase bandwidth and data transmission rates, then productivity is improved, but device complexity increases due to the need for multiple RF sources and power control mechanisms
Solution Approach 1:
The patent applies segmentation by providing separate power detection paths for each carrier in the carrier aggregation system. Each RF source has its own directional coupler and power detector, allowing independent power monitoring and control of each carrier while maintaining overall system coordination. This segmented approach enables precise power management across multiple carriers without requiring complex centralized control.
2Productivity
If multiple carriers are transmitted simultaneously to increase bandwidth, then productivity is improved, but measurement precision deteriorates due to difficulty in controlling total power within specified limits
Solution Approach 1:
The patent implements feedback mechanisms where power detectors continuously monitor the output power of each carrier, and the detected power information is fed back to control circuits that adjust the power amplifier settings. This closed-loop feedback ensures that each carrier's power is precisely controlled and that the total aggregated power remains within specified limits, achieving high measurement and control precision across multiple simultaneous carriers.
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
Enables accurate power detection and control of individual carriers in carrier aggregation systems, ensuring that the total power of the aggregated carrier does not exceed authorized specifications, thereby optimizing power usage and meeting system requirements.
Implementation Method 1
a directional coupler configured to provide an indication of RF power of one of the separate carriers
Data Source
AI summary
Aspects of this disclosure relate to detecting power associated with an individual carrier of a carrier aggregated signal. In an embodiment, a carrier aggregation system includes radio frequency (RF) sources, a transmission output, and a directional coupler. The RF sources, such as power amplifiers, can each be associated with a separate carrier. The transmission output can provide a carrier aggregated signal that includes an aggregation of the separate carriers associated with the RF sources. The directional coupler can provide an indication of RF power of one of the separate carriers.