2D Cross-Polarization Antenna Feedback for 3D Beamforming
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Solution Overview
Problem
Current wireless communication systems lack an effective channel information feedback scheme for 2D-array cross polarization antennas, which is essential for improving throughput and adapting to complex urban environments with increased vertical user distribution.
Innovation Solution
A method and device for channel information feedback in wireless communication systems using 2D cross polarization antennas, involving the generation and transmission of channel state information (CSI) process information, control information, and reference signals between base stations and terminals to enable accurate channel quality measurement and 3D beamforming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of antennas is increased to improve system capacity and data rate, then the transmission capacity is improved, but the physical size of the terminal increases which is not feasible in actual environments
Solution Approach 1:
The patent transitions from traditional one-dimensional antenna arrays to two-dimensional antenna arrays, adding a vertical dimension to the antenna configuration. This allows the system to achieve higher capacity without proportionally increasing the terminal's physical footprint, as the 2D arrangement enables more efficient spatial utilization of antenna elements.
2Productivity
If MU-MIMO technology is used to increase downlink transfer rate by mounting large number of antennas on base station, then the transfer rate is improved, but interference between multiple users deteriorates system performance
Solution Approach 1:
The patent introduces vertical antenna elements to create 3D beamforming capability, adding a vertical dimension to user separation. This enables the system to distinguish between users not only in the horizontal plane but also in the vertical plane, thereby reducing inter-user interference while maintaining high transfer rates in MU-MIMO systems.
3Measurement precision
If 2D-array cross polarization antennas are used to improve channel information feedback accuracy, then the throughput is improved, but the device complexity increases
Solution Approach 1:
The patent segments the 2D antenna array into distinct cross-polarization groups, where antennas are divided into different polarization planes. This segmentation allows for structured and systematic channel estimation and feedback mechanisms, managing the complexity by organizing the antenna elements into manageable polarization-based subsets rather than treating all elements uniformly.
Data Source
AI summary
Disclosed is a 5G or pre-5G communication system to be provided for supporting a data transmission rate higher than that of a 4G communication system such as LTE. According to one embodiment of the present invention, a method by which a base station of a wireless communication system using a two-dimensional X-Pol antenna requests feedback information, can comprise the steps of: generating control information for commanding the generation of the feedback information and channel state information (CSI) process information on vertical axes and horizontal axes of a specific planar antenna and respective planar antennas of the two-dimensional X-Pol antenna; transmitting the generated control information to a terminal in the base station; generating and transmitting a reference signal corresponding to the CSI process; and receiving, from at least one terminal, feedback information in correspondence to the number of CSI processes.