Multi-Channel Digital Predistortion Apparatus with Shared Hardware
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Solution Overview
Problem
Current multi-channel digital predistortion methods require multiple sets of hardware and equipment, increasing system cost and complexity, while aiming to improve power amplifier efficiency and reduce power consumption in wireless communication systems.
Innovation Solution
A method and apparatus that determine a channel index based on temperature differences and priority information, allowing for efficient predistortion compensation across multiple channels by sharing power levels and utilizing a jumping polling mode to improve resource utilization and reduce system costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If concurrent multi-channel digital predistortion methods are used where all channels perform digital predistortion simultaneously and independently, then predistortion performance is maintained, but system cost increases due to requiring multiple sets of digital predistortion apparatuses and hardware equipments
Solution Approach 1:
The patent merges multiple independent predistortion channels into a single shared predistortion apparatus. The channel selection unit selectively switches between different channels to share the same predistortion coefficient calculation and compensation resources, reducing the number of required hardware sets while maintaining predistortion performance through time-division multiplexing.
Solution Approach 2:
The predistortion apparatus is designed with universal functionality to handle multiple channels sequentially. The channel selection unit enables the same predistortion processing unit to serve different channels at different time slots, making the hardware multi-functional rather than dedicated to a single channel, thereby reducing system cost.
2Productivity
If multiple sets of digital predistortion apparatuses are deployed for each channel, then predistortion efficiency per channel is ensured, but system cost and hardware requirements increase
Solution Approach 1:
The patent implements periodic action by sequentially switching between different channels in a cyclic manner. The channel selection unit periodically selects different channels for predistortion processing, allowing the same hardware to serve multiple channels over time, thus maintaining predistortion efficiency while reducing the quantity of hardware required.
Solution Approach 2:
The system transitions from static dedicated hardware per channel to dynamic shared hardware with time-varying channel assignment. The channel selection unit dynamically switches the predistortion processing resources among different channels based on current operational needs, optimizing resource utilization and reducing hardware quantity.
3Device complexity
If channel processing follows fixed sequential order, then system complexity is reduced, but predistortion response time to temperature changes increases
Solution Approach 1:
The patent incorporates feedback mechanisms through temperature sensing devices that monitor channel conditions in real-time. The channel selection unit uses this feedback information to dynamically adjust channel processing priority, switching to channels with significant temperature changes first, thus improving response time while maintaining manageable system complexity through condition-based decision making.
Solution Approach 2:
The system changes the processing parameter from fixed sequential order to dynamic priority-based ordering based on temperature difference. The channel selection unit adjusts the processing sequence according to real-time temperature parameters, prioritizing channels with larger temperature deviations to improve overall system response time without significantly increasing complexity.
Data Source
AI summary
A multi-channel predistortion method and apparatus are disclosed. The technical method provided in the embodiment of the present invention includes: determining a channel index of a current channel to be processed; performing handover to the current channel according to a determined channel index; collecting forward data and reverse data of the current channel, and estimating a predistortion coefficient; and performing predistortion compensation on forward data of each channel according to a corresponding predistortion coefficient. In the embodiments of the present invention, by using a jumping polling mode on a channel time, the predistortion efficiency under multiple channels is improved. In addition, by means of all channels or a plurality of channels sharing N power levels, the resource utilization rate is improved.