Dynamic Precoding Matrix Determination for Uplink MIMO Interference
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Solution Overview
Problem
The existing 4G and 5G wireless communication systems face limitations in uplink capacity due to the precision of prestored uplink codebooks, which are not adaptable to different antenna types, leading to interference between MIMO paired users and suboptimal beamforming gains.
Innovation Solution
A communication method and apparatus that dynamically determine a precoding matrix based on antenna configuration information, including horizontal and vertical dimension parameters and phase offsets, to improve precision and adapt to different terminal devices, reducing interference and enhancing beamforming gains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a prestored uplink codebook is used in 4G and 5G systems, then the system structure is simple and easy to implement, but the precision of the codebook is insufficient and cannot be adapted to different antenna types, leading to reduced uplink capacity and increased interference between MIMO users
Solution Approach 1:
The codebook determination method transitions from static prestored tables to dynamic determination based on antenna configuration parameters. The network device dynamically selects codebook configuration information according to the terminal's antenna type, number of antenna ports, and polarization direction, enabling the codebook to adapt to different terminal devices and improve precision without excessive complexity
Solution Approach 2:
The invention introduces antenna configuration parameters (antenna type, number of antenna ports, polarization direction) as variables that determine codebook selection. By changing these parameters, the system can select from different codebook configurations, thereby improving codebook precision and adaptability to different terminal devices while maintaining manageable system complexity through parameterized configuration
2Productivity
If a fixed codebook set is used for all terminal devices, then the system is easy to implement, but it cannot satisfy the capacity requirements of different terminal devices and reduces uplink transmission performance
Solution Approach 1:
The invention applies different codebook configurations to different terminal devices based on their specific antenna characteristics. Each terminal device receives codebook configuration information tailored to its antenna type, number of ports, and polarization direction, enabling localized optimization of codebook precision for each device while maintaining overall system efficiency
Solution Approach 2:
The codebook configuration mechanism is designed to universally support multiple antenna types and configurations. The network device can select from multiple codebook configurations based on terminal capabilities, making the system universally applicable to various terminal devices with different antenna setups while maintaining high adaptability and uplink capacity
3Reliability
If traditional codebook-based transmission is used, then the implementation is straightforward, but beamforming gains are suboptimal and interference between MIMO paired users increases
Solution Approach 1:
The invention replaces traditional mechanical codebook selection with a more sophisticated system that uses antenna configuration parameters to determine codebook settings. This substitution enables better matching between codebook precision and actual antenna characteristics, improving beamforming accuracy and reducing MIMO user interference through more precise spatial signal processing
Data Source
AI summary
A communication method includes receiving, by a terminal device, first information from a network device. The first information indicates a precoding matrix. The communication method also includes determining, by the terminal device, the precoding matrix based on the first information. The precoding matrix is for sending an uplink signal. The precoding matrix is determined based on a first matrix and a second matrix. At least one of the first matrix is determined from a first matrix set based on the first information, wherein the first matrix set is determined based on a horizontal-dimension parameter of an antenna of the terminal device; or the second matrix is determined from a second matrix set based on the first information, wherein the second matrix set is determined based on a vertical-dimension parameter of the antenna.