Uplink Precoder Design for Multi-Panel 5G UE
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Solution Overview
Problem
Current 5G New Radio (NR) technology faces challenges in efficiently determining and signaling uplink precoders for distributed multiple-input multiple-output (MIMO) transmitters/receivers, which affects communication performance.
Innovation Solution
The method involves a user equipment (UE) receiving precoder indications and time-frequency resource indications from a base station for multiple antenna panels, and transmitting signals accordingly to optimize communication through distributed MIMO transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single unified precoder is used for all antenna panels, then device complexity is reduced, but adaptability to varying channel conditions across different panels deteriorates
Solution Approach 1:
The patent divides the antenna system into multiple independent antenna panels, each with its own precoder. The UE determines separate precoders for each panel based on panel-specific channel conditions, allowing independent optimization of each panel while maintaining overall system performance. This segmentation resolves the contradiction by enabling adaptability at the panel level without requiring a single complex unified precoder for the entire antenna array.
Solution Approach 2:
The patent applies different precoders to different antenna panels based on their local channel conditions. Each panel's precoder is optimized for its specific spatial and channel characteristics rather than using a uniform approach. This local quality principle allows the system to adapt to varying channel conditions across different panels while keeping the overall device complexity manageable through modular panel-based processing.
2Adaptability or versatility
If individual precoders are determined for each antenna panel, then adaptability to channel conditions is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent segments the precoder determination process into panel-specific operations. Each antenna panel has its own precoder determined independently based on panel-specific reference signals and channel conditions. This segmentation enables customized precoding per panel while managing complexity through modular, independent processing for each panel rather than a monolithic approach.
Solution Approach 2:
The patent changes the precoder parameters individually for each antenna panel based on panel-specific channel state information. By allowing parameter changes at the panel level rather than system level, the patent achieves fine-grained adaptability to channel conditions while controlling the overall complexity through localized parameter optimization rather than global reconfiguration.
3Productivity
If multiple antenna panels are used for distributed MIMO transmission, then communication efficiency is improved, but coordination and resource allocation complexity increases
Solution Approach 1:
The patent segments the distributed MIMO system into multiple independent antenna panels that can be configured and processed separately. Each panel operates with its own precoder and resource allocation, reducing the coordination complexity compared to a fully coupled multi-panel system. This segmentation enables communication efficiency through spatial diversity while managing complexity through modular panel-based architecture.
Solution Approach 2:
The patent performs preliminary configuration of antenna panels and their associated precoders before actual data transmission. Panel-specific reference signals are transmitted first to enable channel estimation and precoder determination. This preliminary action prepares each panel independently with optimized parameters, reducing the complexity of real-time coordination during actual communication while maintaining high communication efficiency.
Data Source
AI summary
A UE receives a first precoder indication from a base station. The first precoder indication indicates a first precoder for a first antenna panel. The UE receives a second precoder indication from the base station. The second precoder indication indicates a second precoder for a second antenna panel. The UE receives an indication of first time-frequency resources from the base station for communicating via the first antenna panel. The UE receives an indication of second time-frequency resources from the base station for communicating via the second antenna panel. The UE transmits first signals generated according to the first precoder indication through the first antenna panel on the first time-frequency resources. The UE transmits second signals generated according to the second precoder indication through the second antenna panel on the second time-frequency resources.