Millimeter-Wave Doherty Amplifier Switching for Uplink Power Backoff
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Solution Overview
Problem
In 5G networks, the high peak to average power ratio of uplink signals increases power consumption and reduces standby time in terminal devices, necessitating improved power amplifier efficiency while maintaining signal quality.
Innovation Solution
A radio frequency system based on millimeter wave communication that includes a Doherty power amplification unit with two equal saturation power amplifiers and a micro control unit (MCU) to control transmit power by adjusting the switch controller, optimizing power usage and antenna direction for efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If OFDM technology is used for uplink modulation in 5G networks to improve signal processing efficiency, then signal processing efficiency is improved, but peak to average power ratio increases significantly causing power consumption to increase and standby time to reduce
Solution Approach 1:
The patent implements dynamic power adjustment by controlling the switch controller to selectively connect power amplifiers based on signal requirements. The system transitions from static power amplifier operation to dynamic configuration, adjusting the number of active power amplifiers according to real-time communication needs, thereby optimizing the balance between signal processing efficiency and power consumption.
Solution Approach 2:
The patent changes the operational parameters of the power amplifier system by adjusting transmit power levels through switch controller management. By dynamically modifying parameters such as the number of active power amplifiers and their operating states, the system adapts to varying signal conditions while maintaining efficiency and controlling power consumption.
2Reliability
If maximum transmit power is increased to satisfy coverage requirements in 5G networks, then coverage is improved, but power consumption increases greatly and efficiency of power amplifier reduces
Solution Approach 1:
The patent applies partial action by activating only the necessary number of power amplifiers based on current coverage requirements and signal conditions. Instead of always operating all power amplifiers at maximum capacity, the system selectively engages appropriate numbers of amplifiers, avoiding excessive power consumption while maintaining adequate coverage and signal quality.
3Manufacturing precision
If power amplifier works in power backoff state to maintain transmit signal quality, then signal quality is maintained, but efficiency reduction occurs
Solution Approach 1:
The patent implements dynamic operation modes for power amplifiers, allowing them to switch between different operational states including linear mode for high signal quality requirements and non-linear mode for efficiency-critical scenarios. This dynamic adaptability enables the system to optimize the trade-off between transmit signal quality and power amplifier efficiency based on real-time conditions.
Data Source
AI summary
A radio frequency system based on millimeter wave communication, a method for adjusting transmit power, and a terminal are provided. The radio frequency system includes a Doherty power amplification unit, an antenna array, and a micro control unit MCU, where an output end of the Doherty power amplification unit is connected to an input end of the antenna array, a control end of the Doherty power amplification unit and a control end of the antenna array are both connected to the MCU, and the MCU controls a radiation direction of an antenna in the antenna array; and the Doherty power amplification unit includes two power amplifiers, saturation power of the two power amplifiers is equal, a switch controller is connected in series to one of the two power amplifiers, and the MCU controls transmit power of the Doherty power amplification unit by controlling opening and closing of the switch controller.