Polarization Coordination in Wireless Antenna Systems
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Solution Overview
Problem
Existing radio communication systems face challenges in coordinating antenna polarizations between radio devices, leading to ambiguity in interpreting vertical (VP) and horizontal (HP) polarizations, which affects interference suppression and overall communication quality.
Innovation Solution
A method and device for coordinating polarizations of radio devices with orthogonally polarized antennas by establishing and defining amplitude and phase offsets to unambiguously determine VP and HP polarizations, allowing for efficient interference management and communication optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If slant +45/-45 polarized antennas are used to provide symmetry and polarization orthogonality, then antenna performance is improved, but ambiguity in interpreting vertical and horizontal polarizations occurs between different radio devices
Solution Approach 1:
The patent applies parameter changes by transforming the polarization coordinate system through mathematical rotation. The system converts signals from slant +45/-45 polarization basis to vertical/horizontal polarization basis using rotation transformations. This allows the system to maintain the physical advantages of slant polarized antennas while interpreting signals in the vertical/horizontal frame, thereby resolving the ambiguity problem.
Solution Approach 2:
The patent introduces an intermediary coordinate transformation mechanism that mediates between the physical antenna polarization (slant +45/-45) and the logical polarization interpretation (vertical/horizontal). This transformation layer acts as a bridge, allowing different radio devices to communicate using a common polarization reference frame regardless of their physical antenna orientations.
2Object-affected harmful factors
If vertical-to-vertical and horizontal-to-horizontal polarization combinations are used, then interference suppression is improved with 5-15 dB advantage, but polarization coordination between multiple radio devices becomes complex
Solution Approach 1:
The patent implements universality by creating a common polarization reference frame (vertical/horizontal) that all radio devices in the system can use. This universal coordinate system allows any device to interpret polarizations consistently, enabling the interference suppression benefits of orthogonal polarizations without requiring device-specific coordination complexity. The transformation mechanism works uniformly across all devices.
Solution Approach 2:
The system changes the polarization parameter representation from device-specific slant polarizations to a universal vertical/horizontal basis. By applying coordinate transformation parameters, the system maintains the interference suppression properties of orthogonal polarizations while simplifying the coordination requirement, as all devices operate in the same reference frame.
3Productivity
If polarization-based interference management is implemented, then spectral efficiency is improved, but system-wide polarization coordination becomes necessary
Solution Approach 1:
The patent establishes a universal polarization reference frame that enables system-wide interference management. By transforming all polarization measurements and interpretations to the vertical/horizontal basis, the system allows centralized coordination of polarizations across multiple radio devices, enabling spectral efficiency improvements through polarization-based resource allocation without managing device-specific polarization complexities.
Data Source
AI summary
An object of the present invention is to enable coordination of VP/HP polarizations generated by cross-polarized, i.e. orthogonally polarized antenna configurations, of one radio device with another radio device. The object is achieved by a method in a first eNB (100c) of coordinating polarizations of the first eNB with polarizations of an additional eNB (100a). The polarizations are generated by an antenna configuration comprising at least two orthogonally polarized antennas. The first and additional eNB (100c, 100a) communicate wirelessly with a UE (150a). The method comprises the steps of establishing a first amplitude and/or phase offset of the antenna configuration generating a vertical or horizontal polarization, and a second amplitude and/or phase offset of the antenna configuration generating a polarization orthogonal to said polarization generated by the first amplitude and/or phase offset, defining the polarization generated by the first amplitude and/or phase offset to be vertical and the polarization generated by the second amplitude and/or phase offset to be horizontal, determining a polarization of the UE, and coordinating the defined polarizations with polarizations of the additional eNB based on the determined UE polarization.