Antenna Array Channel State Information Acquisition
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Solution Overview
Problem
Current beamforming systems in wireless communication face challenges in efficiently acquiring and transmitting channel state information (CSI) across multiple antennas, particularly in high-speed and high-capacity communication scenarios, leading to limitations in interference management and signal quality optimization.
Innovation Solution
A method and apparatus for acquiring CSI in an antenna array by receiving relation information on CSI-RS and physical antennas from a base station, allowing terminals to transmit CSI based on this information, enabling effective channel state determination and feedback for improved beamforming and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple CSI-RS are transmitted from different physical antennas in an antenna array, then channel state information coverage is improved, but system complexity and interference management difficulty increase
Solution Approach 1:
The patent segments the antenna array into multiple groups, where each group is associated with a specific CSI-RS resource. This segmentation allows the terminal to measure and report CSI for each group separately, improving overall CSI coverage while managing system complexity through organized modular measurement processes.
Solution Approach 2:
The base station pre-configures and transmits relation information to the terminal before CSI measurement and reporting. This preliminary action provides the terminal with necessary reference information about the mapping between CSI-RS and physical antennas, enabling efficient CSI acquisition without increasing real-time processing complexity.
2Measurement precision
If relation information on CSI-RS and physical antenna mapping is provided to terminals, then CSI acquisition accuracy is improved, but information overhead and transmission burden increase
Solution Approach 1:
The patent extracts and transmits only the essential relation information needed for CSI measurement - specifically the mapping relationship between CSI-RS and physical antennas. By taking out only the necessary information rather than complete channel state data, the system achieves accurate CSI acquisition while minimizing information overhead.
3Productivity
If beamforming is implemented with multiple antennas to achieve high gain, then communication speed and capacity are improved, but interference management and signal quality optimization become more difficult
Solution Approach 1:
The patent implements a feedback mechanism where terminals measure CSI based on transmitted relation information and report channel state information back to the base station. This feedback enables the base station to optimize beamforming weights and manage interference effectively, achieving high communication speeds while maintaining controllable interference levels through continuous adaptation.
Data Source
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AI summary
A method and an apparatus for acquiring channel state information in an antenna array are disclosed. A method for transmitting channel state information by a terminal comprises the step of: receiving relation information on a CSI-RS and a physical antenna from a base station by the terminal, the relation information including information on a first CSI-RS and a first physical antenna transmitting the first CSI-RS and information on a second CSI-RS and a second physical antenna transmitting the second CSI-RS; and transmitting first channel state information and second channel state information to the base station on the basis of the relation information by the terminal, wherein the first physical antenna and the second physical antenna may be included in one antenna array, the first channel state information may be information on a channel state between the terminal and the first physical antenna determined on the basis of the first CSI-RS, and the second channel state information may be information on a channel state between the terminal and the second physical antenna determined on the basis of the second CSI-RS.