Over-the-Air DPD Measurement Combining on Shared UE Resources
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently coordinating digital pre-distortion (DPD) measurements across multiple user equipment (UEs) due to limited resource allocation and coherence in over-the-air signaling, leading to suboptimal performance and interference.
Innovation Solution
Implementing a method and apparatus for coherent combination of DPD measurements across multiple UEs using overlapping network resources, facilitated by network nodes transmitting reference signals (RSs) and configuring UEs to transmit signals that indicate DPD measurements for coherent combination over-the-air (OTA) with other UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple UEs transmit DPD measurements using separate dedicated resources, then measurement accuracy is maintained, but network resource consumption increases and system scalability deteriorates
Solution Approach 1:
The patent combines DPD measurements from multiple UEs into a single aggregated signal transmitted over shared network resources. Instead of allocating separate resources to each UE, the system merges the measurements through coherent combination, achieving accurate DPD estimation while significantly reducing network resource consumption and improving system scalability.
2Productivity
If multiple UEs transmit DPD measurements simultaneously on overlapping resources, then resource efficiency improves, but signal coherence and measurement reliability deteriorate due to interference
Solution Approach 1:
The patent implements a feedback mechanism where the network node receives DPD measurements from multiple UEs, processes them through coherent combination, and uses the aggregated results to refine DPD calibration. This feedback loop ensures that even with simultaneous transmissions on overlapping resources, the system maintains measurement reliability by leveraging the collective signal information and adjusting DPD parameters accordingly.
3Reliability
If DPD measurements are aggregated from multiple UEs using coherent combination, then measurement reliability improves, but the complexity of coordinating resource allocation and signal processing increases
Solution Approach 1:
The patent employs universal resource allocation patterns and standardized coherent combination procedures that can be applied across multiple UEs and network nodes. By defining universal resource configurations and processing algorithms, the system achieves improved measurement reliability while minimizing coordination complexity, as the same methods can be repeatedly applied without requiring complex UE-specific customization.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an UE may receive an indication of a configuration for receiving reference signals (RSs) and for transmitting a digital pre-distortion (DPD) measurement. The UE may receive the RSs from a network node. The UE may transmit a first signal that indicates the DPD measurement as observed via the RSs at the first UE, the first signal configured for coherent combination over the air with a second signal that indicates a DPD measurement as observed via the RSs at a second UE, the first signal and the second signal scheduled for transmission via overlapping network resources. Numerous other aspects are described.