Adaptive Beam Weight Adjustment for Measurement-to-Usage RF Mismatch
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communications systems, there is a likelihood of mismatch between the RF characteristics of sampling beams used for constructing adaptive beam weights and the actual RF characteristics during their usage, leading to impedance mismatches and suboptimal beamforming performance.
Innovation Solution
A method for wireless communications that involves a UE transmitting beamforming capability information and receiving beamforming adjustment phase information based on circuit-level information, allowing for adjustments to adaptive beam weights to account for differences in active and inactive antenna elements during different phases, thereby minimizing mismatches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If adaptive beam weights are constructed using sampling beams, then beamforming capability is improved, but mismatch between measurement and usage RF characteristics causes impedance mismatches and performance degradation
Solution Approach 1:
The patent introduces a preliminary beam weight adjustment phase before actual beamforming usage. During this phase, the UE adjusts beam weights based on circuit-level information (such as impedance values) obtained from the network entity, preparing the beamforming parameters in advance to account for expected mismatches between measurement and usage conditions.
Solution Approach 2:
The patent implements a feedback mechanism where the network entity provides beamforming adjustment phase information to the UE based on circuit-level measurements. The UE uses this feedback to refine and adjust its beam weights, creating a closed-loop system that compensates for RF characteristic mismatches between different operational phases.
2Reliability
If circuit-level information is used to adjust beam weights, then impedance mismatch is reduced, but additional signaling and processing overhead is introduced
Solution Approach 1:
The patent introduces an intermediary adjustment phase that mediates between beam weight construction and usage. The network entity acts as an intermediary by collecting circuit-level information and providing adjustment parameters to the UE, simplifying the complexity management by centralizing the adjustment logic in the network rather than requiring complex UE-side circuit analysis.
Solution Approach 2:
The patent changes the parameters used in beamforming from fixed sampling beam characteristics to dynamically adjusted parameters based on circuit-level information. The beam weights are modified according to impedance values and other circuit characteristics, allowing the system to adapt to actual hardware conditions while maintaining a relatively simple adjustment mechanism.
Data Source
AI summary
Certain aspects of the present disclosure provide a method for wireless communications at a user equipment (UE). The UE transmits beamforming capability information indicating one or more adaptive beam weights. The UE receives, after outputting the beamforming capability information, an indication of beamforming adjustment phase information. The beamforming adjustment phase information is based on circuit-level information of the UE associated with at least one of an adaptive beam weight synthesis period or an adaptive beam weight usage period. The UE adjusts the one or more adaptive beam weights based on the indication.