Precoding Matrix Codebook Segmentation for Four-Antenna Wireless Systems
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Solution Overview
Problem
Conventional wireless communication devices using multiple antennas face limitations with fixed quantization constellations that are not suitable for all antenna arrangements, particularly for four or other numbers of antennas, leading to unsatisfactory precoding techniques.
Innovation Solution
The development of an apparatus and method for precoding wireless transmissions using a set of matrices that differ in total angular region, number of beams, or angular distance between beams, allowing for greater flexibility and accuracy by selecting a precoding matrix from a codebook specifically designed for four antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed quantization constellations are used for precoding, then the precoding process is simple, but the precision and adaptability for different antenna arrangements are insufficient
Solution Approach 1:
The codebook is segmented into multiple groups, each group containing precoding matrices with different total angular regions, numbers of beams, or angular distances. This segmentation allows the system to select appropriate precoding matrices for different antenna arrangements and communication scenarios, improving precoding precision without requiring a single complex unified structure.
Solution Approach 2:
The system dynamically selects precoding matrices from different codebook groups based on the specific antenna arrangement and communication conditions. This dynamic selection capability enables the precoding structure to adapt to varying requirements, achieving high precision for different scenarios while maintaining relative simplicity in each individual codebook group.
2Adaptability or versatility
If conventional fixed codebooks are used, then the implementation is straightforward, but the adaptability to various antenna configurations is limited
Solution Approach 1:
The codebook is divided into multiple groups with distinct characteristics (different total angular regions, numbers of beams, or angular distances). Each group is designed to be suitable for specific antenna arrangements, providing adaptability without requiring a single overly complex unified codebook structure.
Solution Approach 2:
Different codebook groups are optimized for different local conditions or antenna configurations. Each group has specialized precoding matrices tailored to specific scenarios, enabling the system to adapt to various antenna arrangements while keeping each individual codebook group relatively simple and manageable.
3Reliability
If a single codebook is used for all scenarios, then the system is simple to implement, but the performance for specific scenarios like four antennas is unsatisfactory
Solution Approach 1:
The codebook is segmented into multiple groups, with each group containing precoding matrices optimized for specific scenarios (e.g., four antennas, different antenna arrangements). This segmentation ensures reliable transmission performance for each specific scenario while avoiding the need for a single overly complex universal codebook.
Solution Approach 2:
The system changes parameters such as total angular region, number of beams, or angular distance by selecting from different codebook groups. This parameter variation allows the system to optimize transmission performance for different scenarios, including four-antenna configurations, while maintaining manageable codebook design complexity through structured grouping.
Data Source
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AI summary
Embodiments of the present disclosure describe systems and methods for precoding wireless transmissions. Various embodiments may precode rank-one or rank-two wireless transmissions onto four antennas. Various embodiments may precode wireless transmissions using a precoding matrix selected from a group of matrices, wherein different groups of matrices differ in total angular region, number of beams, or angular distance between beams. Other embodiments may be described and/or claimed.