Antenna Panel Self-Calibration for Misalignment Compensation
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Solution Overview
Problem
Antenna panel misalignment in customer premises equipment (CPE) due to mechanical displacement leads to beam steering performance degradation and reduced array gain, especially in mmWave frequencies, affecting communication quality and efficiency.
Innovation Solution
Techniques for determining the angle of misalignment between panels and modifying the codebook to compensate for misalignment, including methods such as self-calibration using signal characteristics, round-trip time measurements, and sensor data, to improve beam steering and communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mechanical displacement apparatus is used to adjust antenna panels, then adaptability and beam steering capability are improved, but manufacturing precision and alignment accuracy deteriorate
Solution Approach 1:
The system performs preliminary calibration by transmitting test signals from one panel to another and measuring the received signal characteristics before actual operation. This preliminary action establishes the misalignment parameters that are then used to pre-adjust the codebook, ensuring accurate beam steering despite mechanical misalignment.
Solution Approach 2:
The system changes the parameters of the codebook (phase shifts and amplitudes) based on the measured misalignment angle. By adjusting these parameters, the system compensates for the mechanical misalignment and restores optimal beam steering performance across all antenna panels.
2Reliability
If codebook modification is performed to compensate for misalignment, then beam steering performance is improved, but device complexity and calibration process complexity increase
Solution Approach 1:
The system performs self-calibration by automatically transmitting test signals, measuring received signal characteristics, determining misalignment angles, and modifying its own codebook parameters without external intervention. This self-service approach reduces the need for manual calibration while improving reliability.
Solution Approach 2:
The system uses feedback from signal measurements (phase, amplitude, time of arrival) to determine misalignment parameters and adjust the codebook accordingly. This closed-loop feedback mechanism ensures accurate beam steering performance while automating the calibration process.
3Productivity
If multiple antenna panels are used to increase array gain, then communication efficiency is improved, but misalignment issues and system complexity worsen
Solution Approach 1:
The system divides the large antenna array into multiple separate panels that can be independently positioned and calibrated. Each panel is treated as a separate unit with its own codebook parameters, simplifying the management of alignment while maintaining the overall array gain through coordinated operation.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for the mitigation of antenna panel misalignment. One aspect provides a method for wireless communication by an apparatus comprising a plurality of panels, wherein the plurality of panels comprise at least a first panel and a second panel. The method generally includes sending one or more signals from a first subset of a plurality of antenna elements associated with the plurality of panels; receiving the one or more signals on a second subset of the plurality of antenna elements; and determining an angle of misalignment between the first panel and the second panel based on one or more signal characteristics of the one or more received signals.