Directional Coupler Power Detection for Aggregated LTE Carriers
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Solution Overview
Problem
Advanced-LTE carrier aggregation systems face challenges in maintaining total carrier power within specified limits, particularly in controlling the power of multiple carriers transmitted simultaneously, which can lead to excessive power consumption and potential interference.
Innovation Solution
A carrier aggregation system that includes RF sources, power amplifiers, and directional couplers to provide an indication of RF power for individual carriers, allowing for accurate power detection and control of each carrier, thereby maintaining the total power of the aggregated carrier within specified limits. This system employs frequency multiplexing circuits, band select switches, and power detectors to regulate the power of each carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is used to increase bandwidth and data transmission rates, then data transmission rate is improved, but total carrier power control becomes difficult to maintain within specified limits
Solution Approach 1:
The patent divides the power control function into separate directional couplers for each carrier frequency. Each directional coupler independently monitors the power of its associated carrier, allowing precise individual power measurement while maintaining overall power control within specified limits. This segmentation enables accurate power detection across multiple aggregated carriers without interference.
2Productivity
If multiple carriers are transmitted simultaneously to increase bandwidth, then data transmission rate is improved, but power consumption increases and interference occurs
Solution Approach 1:
The patent implements feedback control by using directional couplers to continuously monitor the power output of each carrier and providing this information to power control circuits. This feedback mechanism enables real-time adjustment of power levels for each carrier, optimizing power consumption while maintaining data transmission rates and preventing excessive interference.
3Productivity
If multiple carriers are transmitted simultaneously to increase bandwidth, then data transmission rate is improved, but interference between carriers increases
Solution Approach 1:
The patent uses separate directional couplers for each carrier frequency to independently monitor and control power levels. This segmentation allows precise control of each carrier's power output, minimizing inter-carrier interference while maintaining high data transmission rates through carrier aggregation.
Solution Approach 2:
The patent adjusts power levels as a parameter for each individual carrier based on detection from directional couplers. By dynamically changing power parameters for each carrier, the system optimizes transmission performance while reducing interference between aggregated 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 precise power control of individual carriers in carrier aggregation systems, reducing peak power and maintaining compliance with authorized power specifications, while minimizing interference and optimizing data transmission rates.
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 methods of detecting power associated with an individual carrier of a carrier aggregated signal. According to an embodiment, a method can include detecting an indication of power of a first carrier of an aggregated carrier. The method can also include, separately from detecting power of the first carrier, detecting an indication of power of a second carrier of the aggregated carrier. A power associated with a radio frequency source, such as a power amplifier, can be adjusted based on the indication of power of the first carrier.