OAM Beam Divergence Control for Mobile Array Reception
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Solution Overview
Problem
Existing OAM communication systems face reception quality issues due to varying divergence angles of OAM beams, which are affected by changes in transmitting distance and modal variations, especially in mobile scenarios.
Innovation Solution
A method and apparatus that adjust the divergence angle of OAM beams by determining a weight vector based on feedback information from the receiver, using weighting coefficients to match the receiving array, ensuring the ring with strongest energy aligns with the receiving array.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed receiving array is used to receive OAM beams, then the receiving structure is simple, but the reception quality deteriorates when divergence angles vary due to distance or modal changes
Solution Approach 1:
The patent applies dynamics by making the transmitting array configurable rather than fixed. The weight vector adjusts the excitation weights of antenna elements in real-time based on feedback about the receiving array's position and orientation, enabling the beam divergence angle to dynamically adapt to match the receiving array's configuration, thereby maintaining high reception quality despite variations in distance or modal parameters
Solution Approach 2:
The patent implements feedback by having the receiver send information about its position, orientation, and receiving radius to the transmitter. The transmitter uses this feedback to calculate and adjust the weight vector, which controls the beam's divergence angle. This closed-loop feedback mechanism ensures the beam is continuously optimized for the current receiving conditions, resolving the contradiction between fixed structure and adaptive performance
2Reliability
If the divergence angle is adjusted for different transmitting distances, then the reception quality improves, but the system complexity increases due to need for distance measurement and dynamic adjustment
Solution Approach 1:
The patent uses feedback from the receiver regarding its position and orientation to determine the appropriate weight vector. This feedback mechanism automates the adjustment process, eliminating the need for complex manual configuration or separate control systems, thereby achieving improved reception quality with manageable system complexity
Solution Approach 2:
The system performs self-adjustment by automatically calculating the optimal weight vector based on feedback information from the receiver. The transmitter autonomously determines the appropriate beam divergence angle and configures its antenna weights without external intervention, reducing system complexity while maintaining high reception quality across varying distances
3Reliability
If different receiving arrays are used for different OAM modals, then the reception quality for each modal is optimized, but the device complexity and cost increase significantly
Solution Approach 1:
The patent applies universality by designing a single receiving array that can handle multiple OAM modals. Instead of requiring separate receiving arrays for different modals, the system uses one versatile receiving array combined with a configurable transmitting array. The weight vector adjustment at the transmitter enables the same receiving array to optimally receive different modals by adapting the transmitted beam's divergence angle to match the receiver's capabilities
Solution Approach 2:
The patent inverts the conventional approach by making the transmitter adaptive rather than the receiver. Instead of equipping the receiver with multiple specialized arrays to handle different modals, the system makes the transmitter configurable to adapt its beam characteristics to match a single receiving array. This inversion shifts the complexity from the receiver side to the transmitter side, reducing overall system complexity while maintaining modal-specific optimization
Data Source
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Figure 2
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AI summary
The present disclosure relates to the technical field of communications, and provides a determination method and apparatus for an OAM beam transmission method, user equipment, and a storage medium. The OAM beam transmission method comprises: sending a reference signal (RS) to a receiving end (101); receiving information fed back by the receiving end on the basis of the RS (102); determining a weight vector corresponding to a sending end on the basis of the information (103), the weight vector being used for adjusting a divergence angle of an OAM beam sent by a sending array of the sending end; determining an OAM signal to be sent, and adjusting, on the basis of the weight vector, a divergence angle of the OAM signal to be sent to obtain an adjusted OAM beam (104); and sending the adjusted OAM beam (105). In this way, according to the OAM beam transmission method provided by embodiments of the present disclosure, the reception quality of the OAM beam is ensured, the problem of reduction in the transmission performance of the OAM beam caused by modes and distance variations of receiving and sending antenna arrays in coaxial and mobile scenarios can be effectively solved, and the transmission performance of the OAM beam is improved.