UE Antenna Port Calibration for Non-Codebook Uplink Precoding
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Solution Overview
Problem
Existing non-codebook-based uplink transmission schemes in user equipment (UE) face challenges due to varying UE TX antenna configurations and dynamic phase differences between antenna ports, leading to non-optimal precoding and reduced coverage in codebook-based and non-codebook-based transmission methods.
Innovation Solution
The UE determines its antenna port group calibration capability through phase and amplitude calibration, generating indicators for valid combinations of antenna ports, allowing efficient non-codebook-based precoding by compensating for user equipment-dependent transfer functions and enabling simultaneous transmission across multiple antenna ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-codebook-based transmission is used, then transmission flexibility is improved, but precoding accuracy deteriorates due to varying UE TX antenna configurations and dynamic phase differences
Solution Approach 1:
The patent applies preliminary action by performing calibration of antenna port groups before actual transmission. The UE determines calibration capability indicators and generates calibration information in advance, allowing the system to compensate for dynamic phase differences and antenna configuration variations when transmission occurs, thus resolving the contradiction between flexibility and precision.
Solution Approach 2:
The patent changes parameters by introducing calibration capability indicators and calibration information as new system parameters. These parameters enable the system to adapt to varying antenna configurations and phase differences dynamically, maintaining precoding accuracy while preserving transmission flexibility through non-codebook-based methods.
2Area of stationary object
If multiple antenna ports are used for simultaneous transmission, then transmission coverage is improved, but system complexity increases due to calibration requirements
Solution Approach 1:
The patent segments the antenna system into antenna port groups that can be independently calibrated. This segmentation allows the system to manage multiple antenna ports through modular calibration units, reducing overall system complexity while maintaining the ability to achieve wide transmission coverage through coordinated operation of the segmented groups.
Solution Approach 2:
The patent implements self-service by enabling the UE to autonomously determine its own calibration capability indicators and generate calibration information without requiring network intervention. This self-calibration mechanism reduces system complexity by eliminating the need for complex external calibration systems while still achieving improved transmission coverage through multiple antenna ports.
Data Source
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AI summary
A user equipment, UE, comprising means for determining an antenna port group calibration capability of the UE, wherein the antenna port group calibration capability depends on at least one of phase calibration or amplitude calibration of one or more antenna port groups of the UE.