Multi-Antenna CSI Feedback Using Separate Antenna Group Reports
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Solution Overview
Problem
Existing wireless communication systems with multiple antennas face challenges in accurately determining and reporting channel state information (CSI) for individual antenna groups, leading to suboptimal precoder selection and degraded communication performance.
Innovation Solution
The method involves separating antennas into distinct groups and providing separate CSI reports for each group, allowing for more granular and accurate precoder selection by the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate CSI reports are provided for each antenna group, then precoder selection accuracy is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent divides the antenna array into multiple antenna groups (e.g., first antenna group and second antenna group) and configures separate CSI reporting for each group. This segmentation allows the UE to measure and report CSI independently for each antenna group, improving the precision of channel state information while managing complexity through structured configuration from the network side.
2Reliability
If multiple CSI reports are transmitted, then communication quality is improved, but uplink signaling overhead increases
Solution Approach 1:
The patent applies local quality by configuring different reporting modes for different antenna groups based on their specific channel characteristics. The network can configure first CSI reporting for the first antenna group and second CSI reporting for the second antenna group with potentially different parameters, allowing optimized information transmission for each local antenna scenario while managing overall overhead.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a first channel state information (CSI) for a first group of antennas of the UE and a second CSI for a second group of antennas of the UE, where the first group of antennas are different than the second group of antennas. The UE may transmit one or more of the first CSI or the second CSI in a CSI report. Numerous other aspects are provided.