Shared Digital Pre-Distortion for Multi-Channel Power Amplifiers
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Solution Overview
Problem
Power amplifiers in multi-antenna sending apparatuses experience significant non-linear distortion, leading to reduced amplification efficiency and increased design complexity, costs, and power consumption due to the need for multiple digital pre-distortion processors to account for different non-linear characteristics of each PA.
Innovation Solution
A pre-distortion processing apparatus with a reduced number of digital pre-distortion processors that performs digital pre-distortion processing and feedback complex multiplication or addition to optimize signal amplification, ensuring linear amplification characteristics across multiple transmit channels, thereby reducing design complexity and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple digital pre-distortion processors are used to account for different non-linear characteristics of each PA, then amplification efficiency is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple DPD processors into a single shared DPD processor that serves multiple power amplifiers. This is achieved by implementing a centralized pre-distortion processing unit that receives feedback from multiple PAs and generates pre-distortion signals for all of them, thereby reducing device complexity while maintaining amplification efficiency through shared computational resources and unified non-linear characteristic compensation.
2Reliability
If multiple digital pre-distortion processors are used to account for different non-linear characteristics of each PA, then amplification efficiency is improved, but costs increase
Solution Approach 1:
The patent merges multiple DPD processor functions into a single integrated unit, reducing the total number of processors required and thereby lowering manufacturing costs. The shared DPD processor utilizes feedback from multiple PAs to generate appropriate pre-distortion signals, achieving cost savings through reduced component count while maintaining the ability to compensate for individual PA non-linear characteristics.
3Reliability
If multiple digital pre-distortion processors are used to account for different non-linear characteristics of each PA, then amplification efficiency is improved, but power consumption increases
Solution Approach 1:
The patent consolidates multiple DPD processors into a single shared processor that serves multiple power amplifiers. This centralized approach reduces overall power consumption by eliminating redundant computational operations across multiple processors while maintaining the capability to compensate for non-linear characteristics of each individual PA through shared feedback processing and unified pre-distortion signal generation.
Data Source
AI summary
The present disclosure relates to pre-distortion processing methods and apparatus. One example apparatus includes a first pre-distortion part and a second pre-distortion part. The first pre-distortion part includes N digital pre-distortion (DPD) processors. The first pre-distortion part and the second pre-distortion part perform pre-distortion processing on a signal to support a power amplifier in performing linear amplification on the signal.