Power Amplifier Selection for Low-Backoff Radio Transmission
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Solution Overview
Problem
Power amplifiers in radio telecommunications experience significant efficiency decrease when operated with backoff from their maximum output power capability.
Innovation Solution
An apparatus comprising a plurality of power amplifiers with different maximum output power capabilities, and control means to select a set of power amplifiers for simultaneous transmission via respective antenna ports, optimizing the combined total transmit power to minimize backoff.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power amplifiers are operated with backoff from maximum output power capability, then transmit power can be controlled, but efficiency decreases significantly
Solution Approach 1:
The system segments the power amplifier resources into multiple individual PAs with different maximum output power capabilities, allowing selective activation and combination of PAs to match required transmit power levels, thereby avoiding efficiency loss from backoff operation
Solution Approach 2:
The control means dynamically selects and configures the number and combination of power amplifiers based on the required transmit power target, adapting the active PA configuration in real-time to operate PAs near their optimal efficiency points while meeting power requirements
2Power
If multiple power amplifiers are used for simultaneous transmission, then transmit power capability increases, but system complexity increases
Solution Approach 1:
The control means automatically manages the selection, configuration, and coordination of multiple power amplifiers based on power targets and channel conditions, eliminating the need for manual configuration and reducing operational complexity while maximizing power capability
Data Source
AI summary
An apparatus comprisinga plurality of power amplifiers, wherein at least some of the plurality of power amplifiers have different maximum output power capabilities;a multiplicity of antenna ports;control means configured to select a set of one or more power amplifiers from the plurality of power amplifiers for simultaneous transmission via respective antenna ports.