Structure-Aware Precoding for Uncalibrated Multi-Panel Antenna Arrays
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Solution Overview
Problem
Existing precoding schemes for multi-panel antenna arrays do not adequately account for the structural properties of the arrays, leading to poor performance, especially when panels are uncalibrated or mismatched, and result in inefficient CSI feedback overhead.
Innovation Solution
Tailor precoding methods to the structural properties of multi-panel antenna arrays, using codebooks designed specifically for these arrays, which consider factors like panel arrangement and calibration, to improve precoding quality and reduce CSI feedback overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional precoding schemes are used for multi-panel antenna arrays, then implementation is simpler, but precoding performance deteriorates due to ignoring structural properties like panel arrangement and calibration
Solution Approach 1:
The patent applies local quality by designing precoding schemes that account for specific structural properties of different panels in the antenna array. Each panel's characteristics (spacing, orientation, calibration status) are considered individually when constructing precoding matrices, allowing the system to adapt to local variations in panel geometry and calibration rather than treating all panels uniformly.
2Loss of information
If codebooks are designed for single-panel arrays, then design is simpler, but CSI feedback overhead increases when applied to multi-panel arrays due to inadequate representation of panel structure
Solution Approach 1:
The patent segments the codebook design into components that separately represent different aspects of the multi-panel array structure. By dividing the precoding matrix into panel-specific sub-matrices that can be independently selected and combined, the system efficiently represents the structured nature of multi-panel arrays while reducing the overall codebook size and CSI feedback requirements compared to unstructured approaches.
Data Source
AI summary
The invention relates to a wireless communication device configured for use in a wireless communication system, wherein, based on one or more structural properties of a multi-panel antenna array describing how the antenna array is structured into multiple panels, a precoder is selected to be applied for a transmission from the multi-panel antenna array; and wherein an information indicative of the determined precoder is signaled to a transmit radio node; the invention further refers to a transmit radio node configured for transmitting via a multi-panel antenna array in a wireless communication system, wherein signaling indicating one or more structural properties of a multi-panel antenna array describing how the antenna array is structured into multiple panels is transmitted to the wireless communication device.