OAM Beam Weighting for Divergence Matching in Mobile Reception
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Solution Overview
Problem
The reception quality of OAM beams is affected when different modal properties correspond to different divergence angles, and optimal receiving radii are not matched in existing OAM communication systems, particularly in mobile scenarios.
Innovation Solution
A method and apparatus that adjust the divergence angle of OAM beams by using a weight vector based on feedback information from the receiver, ensuring the ring with the strongest energy matches the receiving array, even in mobile scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different modal properties of OAM beams correspond to different divergence angles, then the OAM communication system can support multiple modes, but the reception quality is affected because optimal receiving radiuses for different divergence angles are different and cannot be matched with one receiving array
Solution Approach 1:
The patent applies dynamics by making the divergence angle adjustable rather than fixed. The system dynamically adjusts the divergence angle of OAM beams based on feedback information from the receiver, allowing the transmission characteristics to adapt to different receiving conditions and maintain optimal reception quality across multiple modes.
Solution Approach 2:
The patent changes the physical parameter of divergence angle to resolve the contradiction. By adjusting the divergence angle parameter based on feedback information (such as receiving radius), the system can match different modal properties with appropriate divergence angles, ensuring that each mode achieves its optimal receiving condition at the receiver.
2Device complexity
If a fixed receiving array is used, then the device complexity is reduced, but the reception quality deteriorates in mobile scenarios where the optimal receiving radius changes
Solution Approach 1:
The patent implements a feedback mechanism where the receiver sends feedback information (such as optimal receiving radius or divergence angle information) back to the transmitter. This feedback loop allows the transmitter to adjust its OAM beam divergence angle to match the receiver's optimal conditions, maintaining high reception quality in mobile scenarios without increasing receiver complexity.
Solution Approach 2:
The system enables self-adjustment where the transmitter automatically adjusts its transmission parameters based on feedback from the receiver. This self-service mechanism allows the system to adapt to mobile scenarios without requiring complex active adjustment mechanisms at the receiver side.
Data Source
AI summary
A method for orbital angular momentum (OAM) beam communication includes: transmitting a reference signal (RS) to a receiver; receiving feedback information provided by the receiver based on the RS; determining a weight vector corresponding to the transmitter based on the information, in which, the weight vector adjusts a divergence angle of an OAM beam transmitted by the transmitter; determining an OAM signal to be transmitted, and adjusting a divergence angle of the OAM signal to be transmitted based on the weight vector to obtain an adjusted OAM beam; transmitting the adjusted OAM beam.