3-Antenna Port Codebook Design for Uplink Spectral Efficiency
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Solution Overview
Problem
Current communication systems face challenges in supporting uplink transmissions with 3 antenna ports, as existing codebooks are designed for 2 or 4 antenna ports, leading to suboptimal spectral efficiency and peak rate due to the inability to fully utilize the antenna gains of 3-antenna-port terminals.
Innovation Solution
A new codebook design that supports uplink transmissions based on 3 antenna ports, allowing for the determination of a precoding matrix from a codebook with 3 rows, enabling full utilization of antenna gains and increasing spectral efficiency and peak rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing codebooks designed for 2 or 4 antenna ports are used for 3-antenna-port terminals, then device compatibility is maintained, but spectral efficiency and peak rate are reduced due to inability to fully utilize antenna gains
Solution Approach 1:
The codebook is designed to be dynamically adaptable to different antenna port configurations. The precoding matrix selection mechanism allows the system to switch between different codebook structures based on the terminal's antenna port number, enabling optimal performance for 3-antenna-port terminals while maintaining compatibility with 2 and 4 antenna port configurations through the same framework
Solution Approach 2:
The invention changes the structural parameters of the codebook to match the specific antenna port configuration. For 3-antenna-port terminals, the codebook uses 3-row precoding matrices with specific column structures that match the antenna ports, rather than forcing compatibility with 2 or 4-row matrices. This parameter adaptation enables full utilization of the 3 antenna gains while maintaining the same codebook design framework for other configurations
2Ease of manufacture
If 3-antenna-port terminals are degraded to 2-port transmissions, then existing codebook structures can be used, but the peak rate and spectral efficiency are limited
Solution Approach 1:
The codebook is segmented into different sections or types based on antenna port configuration. The system selects the appropriate segment (codebook type) based on the terminal's antenna port number. For 3-antenna-port terminals, a specific codebook segment with 3-row precoding matrices is used, while other segments handle 2 or 4 antenna ports, allowing each to operate at optimal performance
Solution Approach 2:
The codebook design achieves universality by creating a multi-functional framework that can serve different antenna port configurations. The same codebook design methodology and selection mechanism work for 2, 3, and 4 antenna port terminals, with each configuration using the appropriate precoding matrix structure from the unified codebook framework, eliminating the need for separate codebook implementations
Data Source
AI summary
Provided in the present application are a wireless communication method, a terminal device, and a network device. A codebook supporting uplink transmission based on a 3-antenna port is designed, the antenna gain of 3-antenna port transmission can be fully utilized, and the spectral efficiency and the peak rate can be improved. The wireless communication method includes: receiving, by a terminal device, a TPMI and a TRI transmitted by a network device; determining, by the terminal device and based on the TPMI, a precoding matrix from a codebook which corresponds to the TRI, wherein each codeword of the codebook includes three rows; performing, by the terminal device, a precoding process of data by using the precoding matrix; and transmitting, by the terminal device, the precoded data.