Antenna Array Geometry Information for Wireless Communication
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Solution Overview
Problem
Conventional multi-antenna systems do not fully utilize antenna array geometry information, leading to inefficiencies in channel feedback and transmission efficiency, particularly in LTE FDD systems where codebooks are shared across different antenna configurations, resulting in unnecessary channel feedback overhead.
Innovation Solution
The proposed solution involves generating and transmitting antenna array geometry information, including geometry arrangement, spacing, and polarization direction, to enable the use of specific codebooks tailored to each antenna configuration, reducing channel feedback overhead by matching channel estimation results with corresponding codewords in dedicated codebooks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If codebooks are shared across different antenna configurations, then device complexity is reduced, but channel feedback overhead increases
Solution Approach 1:
The patent segments the unified codebook into multiple codebook groups, where each group corresponds to a specific antenna configuration type (e.g., different array geometries, spacing patterns, or polarization arrangements). This segmentation allows the system to select the appropriate codebook group based on the actual antenna configuration, thereby reducing feedback overhead while maintaining adaptability to different hardware setups.
Solution Approach 2:
The patent applies local quality by tailoring codebook characteristics to specific antenna configuration requirements. Different codebook groups are designed with properties optimized for their corresponding antenna types (e.g., different precoding matrix structures for different array geometries), enabling more accurate channel representation for each configuration while reducing the overall feedback burden.
2Productivity
If antenna array geometry information is not utilized, then system simplicity is maintained, but transmission efficiency decreases
Solution Approach 1:
The patent implements preliminary action by pre-defining multiple codebook groups that correspond to different antenna configuration types before actual communication occurs. The system预先 categorizes codebooks based on antenna geometry information (such as array factor patterns, element spacing, or polarization configurations), so that when communication begins, the appropriate codebook group can be quickly selected without real-time computation, thereby improving transmission efficiency while controlling complexity.
3Measurement precision
If geometry-specific codebooks are used, then channel estimation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the codebook structure into multiple groups, where each group is optimized for specific antenna geometry characteristics (such as different array factors, spacing patterns, or polarization configurations). This segmentation enables the system to select the most appropriate codebook group based on the actual antenna configuration, thereby improving channel estimation accuracy for each specific geometry while managing overall codebook complexity through structured organization.
Solution Approach 2:
The patent applies parameter changes by varying codebook characteristics (such as precoding matrix dimensions, structure, or content) according to different antenna configuration parameters (array geometry, element spacing, polarization). This allows the system to adapt codebook parameters to match the specific antenna setup, improving measurement precision while maintaining a manageable codebook structure through systematic parameter variation rather than completely separate codebooks for each configuration.
Data Source
AI summary
A wireless communication device and a wireless communication method. The wireless communication device participates in wireless communication involving an antenna array, includes: a communication unit, configured to receive a signal including antenna array geometric information about a target communication device from the target communication device of the wireless communication device; and an antenna array geometric information parsing unit, configured to determine an antenna array geometric configuration of the target communication device according to the signal, wherein the antenna array geometric information indicates at least one of a geometric arrangement way of antenna elements in the antenna array, an antenna element interval and an antenna polarization direction.