8TX UE Codebook for Two Coherent Antenna Group Precoding
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently utilizing 8TX UE with two coherent antenna groups for PUSCH transmission, particularly in classifying and applying precoding matrices for optimal signal transmission.
Innovation Solution
The proposed solution involves classifying 4TX precoding matrices into different types based on the number of active transmitting antenna ports and their relative phases, and using these classifications to determine suitable precoding matrices for each coherent antenna group, allowing for the construction of 8TX precoders for transmission ranks from 2 to 8.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 8TX UE with two coherent antenna groups is used for PUSCH transmission, then transmission capacity and signal quality are improved, but complexity in classifying and applying precoding matrices increases
Solution Approach 1:
The patent segments the 8TX antenna system into two coherent antenna groups, where each group can be independently configured with precoding matrices. This segmentation allows the system to manage complexity by treating each group separately while maintaining overall transmission capacity through coordinated operation of both groups.
Solution Approach 2:
The patent applies partial action by allowing different transmission ranks for different antenna groups (e.g., rank 1 for first group, rank 2 for second group) rather than requiring uniform configuration across all 8 antennas. This enables flexible adaptation to channel conditions while reducing the complexity of managing a single large precoding matrix.
2Reliability
If multiple precoding matrix types are classified and applied, then signal quality and transmission performance are improved, but control message complexity and processing overhead increase
Solution Approach 1:
The patent applies local quality by classifying precoding matrices into different types (Type 1, Type 2, Type 3) based on specific characteristics such as number of active antenna ports and relative phases. Each type is optimized for particular signal quality requirements, allowing the system to select appropriate precoding types for different transmission scenarios without requiring a single complex solution for all cases.
Solution Approach 2:
The patent utilizes parameter changes by varying key parameters of precoding matrices including number of active transmitting antenna ports, relative phases between antenna ports, and transmission ranks. These parameter variations enable adaptation to different channel conditions and signal quality requirements while maintaining manageable control message structures through systematic classification.
3Productivity
If transmission rank N (2-8) is supported with two antenna groups, then data throughput is improved, but complexity in determining suitable precoding matrices increases
Solution Approach 1:
The patent applies preliminary action by pre-classifying precoding matrices into different types and organizing them according to their characteristics before actual transmission. This preliminary classification creates a structured framework that simplifies the selection process during real-time operation, as the UE and gNB can refer to predefined types rather than determining precoding matrices from scratch for each transmission.
Solution Approach 2:
The patent introduces an additional dimension of classification by organizing precoding matrices not only by transmission rank but also by type (Type 1, Type 2, Type 3) based on antenna port characteristics and phases. This multi-dimensional organization provides a more systematic approach to selecting precoding matrices for different transmission ranks, making the operation easier through structured selection criteria.
Data Source
AI summary
Methods and apparatuses for 8TX UE with two coherent antenna groups are disclosed. In one embodiment, a UE comprises a transceiver; and a processor coupled to the transceiver, wherein the processor is configured to receive, via the transceiver, a control message scheduling a PUSCH transmission with transmission rank N to be transmitted by two antenna groups, wherein, the control message includes a TPMI that indicates two 4TX precoding matrices used by the two antenna groups, and the two 4TX precoding matrices are of the same type, wherein, N is any of 2 to 8; and transmit, via the transceiver, the scheduled PUSCH transmission according to the control message.