CSI Reporting with Split Precoding Vectors for Near-Field MIMO
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing channel state information (CSI) reporting methods are inadequate for near-field communication scenarios, particularly with the use of extremely large MIMO systems, leading to inefficiencies and increased bit overhead in reporting channel information.
Innovation Solution
A novel CSI reporting method that designs a pre-coding matrix based on specific vector formats and reduced bit reporting, considering the characteristics of near-field communication, including the use of first and second vectors with defined parameters and candidate combinations to determine the pre-coding matrix, thereby reducing UE complexity and bit overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If existing CSI reporting methods are used, then channel information can be reported, but bit overhead and reporting complexity increase significantly in near-field scenarios
Solution Approach 1:
The pre-coding matrix is segmented into two separate vectors: a first vector determined based on a first parameter and a second vector determined based on a second parameter. This segmentation allows independent determination and reporting of each vector, reducing the overall complexity of CSI reporting while maintaining complete channel information representation.
2Measurement precision
If traditional pre-coding matrix reporting is used, then channel accuracy can be maintained, but bit overhead increases
Solution Approach 1:
The patent extracts and reports only the essential parameters (first parameter and second parameter) that define the pre-coding matrix, rather than reporting the complete matrix or all possible channel state information. This extraction approach maintains channel accuracy while significantly reducing the quantity of data that needs to be transmitted.
3Reliability
If full pre-coding matrix information is reported, then communication accuracy is improved, but UE complexity and processing burden increase
Solution Approach 1:
The patent changes the representation parameters from reporting the complete pre-coding matrix to reporting only two key parameters (first parameter and second parameter) that can reconstruct the matrix. This parameter transformation reduces UE processing complexity while maintaining communication reliability through accurate channel state information.
Data Source
AI summary
This patent application discloses methods, apparatus, and systems that relate to reference signaling design and configuration. In one example aspect, a method for wireless communication includes receiving, by a wireless device, a measurement reference signal; determining, by the wireless device, a pre-coding matrix based on the received measurement reference signal; and transmitting, by a wireless device, information of the determined pre-coding matrix, wherein the pre-coding matrix is determined based on a first vector of length N1 and a second vector of length N2, wherein the first vector is determined based on a first parameter, wherein the second vector is determined based on a second parameter and the first parameter and the second parameter have relationship.