Antenna Array Phase Calibration for Near-Field Beam Correspondence
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communications systems face challenges in maintaining effective beam correspondence when transitioning from far field to near field conditions, as phase assumptions based on planar wavefronts become inaccurate in near field communications, leading to reduced communication quality and increased error rates.
Innovation Solution
User equipment (UE) determines phase calibration adjustments based on near field conditions, using reference signals and feedback to account for spherical wavefronts, thereby enhancing phase calibration for improved communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phase assumptions based on planar wavefronts are used for beam correspondence, then far field communication is maintained, but near field communication quality deteriorates due to spherical wavefront inaccuracies
Solution Approach 1:
The system dynamically switches between far field and near field calibration modes based on detected communication conditions. The UE determines whether it is operating in near field or far field conditions and applies the appropriate phase calibration adjustments, making the beam correspondence adaptive rather than static
Solution Approach 2:
The system changes the phase calibration parameters based on the operating field conditions. Different phase calibration adjustments are applied for near field versus far field operations, allowing the system to optimize performance for each specific scenario rather than using a single fixed parameter set
2Reliability
If phase calibration adjustments are determined for near field conditions, then communication quality in near field improves, but system complexity increases due to additional calibration procedures
Solution Approach 1:
The UE autonomously determines whether it is operating in near field or far field conditions and self-adjusts the phase calibration parameters accordingly. The system performs self-calibration without requiring external intervention or complex manual configuration procedures
Solution Approach 2:
The system uses feedback from reference signal measurements to determine the operating field conditions and adjust phase calibration parameters. The UE measures reference signals from the second device and uses these measurements to infer whether near field or far field calibration should be applied
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate one or more reference signals to identify that communication with a second device is in a near field of the second device. The UE may determine, based on the communication with the second device being in the near field, a phase calibration adjustment for a first phase value associated with a far field. The UE may transmit, based on the communication with the second device being in the near field, a message according to the first phase value and the phase calibration adjustment.