Instantaneous Gain Signaling for Multiplexed Amplitude Distortion Correction
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Solution Overview
Problem
Conventional wireless communication systems face challenges in efficiently correcting amplitude distortion in multiplexed signals due to power amplifier envelope tracking, which requires extensive signaling and increased processing loads at the receiving device to account for distortions from other multiplexed UEs, leading to inefficient power consumption and decoding delays.
Innovation Solution
The system provides a compressed indication of instantaneous gain to the receiving UE, allowing it to apply a digital post-distortion model to correct amplitude distortion based on its own allocation, rather than requiring detailed information about other UEs, thereby reducing processing overhead and improving decoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detailed information about other multiplexed UEs is provided to correct amplitude distortion, then correction accuracy is improved, but signaling overhead and processing load increase
Solution Approach 1:
The patent extracts only the essential instantaneous gain information needed for distortion correction, rather than providing complete details about other multiplexed UEs. The base station determines instantaneous gain values for each UE based on envelope tracking distortion characteristics and transmits only these compressed gain indications, allowing the UE to apply correction independently without processing other users' allocation and pilot structures.
Solution Approach 2:
The patent segments the distortion correction process by providing UE-specific instantaneous gain information rather than system-wide distortion parameters. Each UE receives tailored gain indications relevant only to its own signal correction needs, enabling independent processing and reducing the computational burden of analyzing multiplexed signal interactions.
2Measurement precision
If detailed information about other multiplexed UEs is provided to correct amplitude distortion, then correction accuracy is improved, but power consumption increases
Solution Approach 1:
The patent extracts and transmits only the critical instantaneous gain parameters needed for distortion correction, eliminating the need for UEs to process extensive information about other multiplexed users. This reduction in data volume directly lowers the computational energy required at the receiving device while maintaining correction effectiveness.
3Device complexity
If instantaneous gain information is compressed, then signaling overhead is reduced, but information precision may be lost
Solution Approach 1:
The patent transforms the instantaneous gain information into a compressed representation that retains essential correction characteristics. The base station determines instantaneous gain values based on envelope tracking distortion and transmits these in a compressed form that preserves the key parameters needed for accurate distortion correction at the UE.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a transmitting device, an indication of an instantaneous gain associated with an amplitude distortion associated with frequency division multiplexed downlink communications to the UE from the transmitting device. The UE may receive the frequency division multiplexed downlink communications from the transmitting device over frequency resources allocated to the UE, wherein receiving the frequency division multiplexed downlink communications comprises applying a digital post distortion model to the frequency division multiplexed downlink communications according to the instantaneous gain.