Precoding Codebook Structure for Multi-Panel Uplink Antenna Ports
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Solution Overview
Problem
Existing communication systems face challenges in designing codebooks that support more than 4 antenna ports, particularly for terminals with multiple-panel antenna configurations, leading to inefficiencies in uplink transmissions.
Innovation Solution
A precoding matrix design for wireless communication systems that utilizes antenna ports corresponding to adjacent polarization antenna pairs, concentrating transmission power on high-efficiency ports and incorporating relative phases between polarization pairs, allowing for improved uplink transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If codebooks are designed to support more than 4 antenna ports, then the adaptability to multiple-panel antenna configurations is improved, but the device complexity increases
Solution Approach 1:
The codebook for N antenna ports (N>4) is segmented into multiple codebooks for 2 antenna ports. Each codebook for 2 antenna ports contains precoding matrices that can be combined through segmentation to form the larger codebook, reducing the overall complexity while maintaining support for multiple antenna ports
Solution Approach 2:
The codebook structure implements a nested relationship where codebooks for smaller antenna configurations (2 antenna ports) are nested within the larger codebook structure for N antenna ports. This allows the system to reuse existing smaller codebooks while building up to support larger configurations
2Productivity
If transmission power is concentrated on high-efficiency antenna ports, then the uplink transmission performance is improved, but the power distribution complexity increases
Solution Approach 1:
The precoding matrices apply local quality optimization by concentrating transmission power on specific high-efficiency antenna ports based on channel conditions. Each precoding matrix is designed with specific non-zero elements at positions corresponding to the most efficient antenna ports, allowing localized power concentration rather than uniform distribution
3Manufacturing precision
If the number of non-zero elements in each column of the precoding matrix is limited to two or four, then the manufacturing precision of the codebook structure is improved, but the transmission flexibility is reduced
Solution Approach 1:
The codebook design implements dynamics by providing multiple codebooks for 2 antenna ports with different numbers of non-zero elements (2 or 4). The system can dynamically select which codebook to use based on transmission requirements, maintaining structural precision while adapting to different transmission scenarios through codebook selection rather than requiring a single rigid structure
Data Source
AI summary
Embodiments of the present disclosure provide a wireless communication method, a terminal device, a network device, and a chip. the method includes a terminal device determining a precoding matrix from a preconfigured codebook based on one or more Transmit Precoding Matrix Indicator (TPMI) indicated by a network device; wherein the precoding matrix includes N rows, N is a multiple of 2 and greater than 4, the precoding matrix satisfies a first condition or a second condition, the first condition is that each column of the precoding matrix includes two non-zero elements, and the second condition is that each column of the precoding matrix includes four non-zero elements; employing the precoding matrix to precode data; and transmitting precoded data.