OAM Mode Subframe Association for Signal Fading Reduction
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Solution Overview
Problem
Conventional communication technologies using diversity methods for signal transmission fail to enhance the electromagnetic field and reduce signal fading effectively, resulting in a poor diversity effect due to non-interacting electromagnetic waves with the same properties.
Innovation Solution
A communication method based on orbital angular momentum (OAM) is introduced, where OAM modes are determined for multiple subframes of a radio frame, and these modes are associated to enhance the electromagnetic field and improve the diversity effect by interacting electromagnetic waves, with specific formulas and sequences used to determine and manage OAM modes for improved signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional diversity technology is used to transmit the same signal repeatedly, then signal transmission is achieved, but the electromagnetic field is not enhanced and signal fading remains poor
Solution Approach 1:
The patent changes the physical parameters of electromagnetic waves by introducing different OAM modes (angular momentum quantum numbers) for different subframes. This transforms identical signals into waves with different orbital angular momentum characteristics, enabling constructive interference to enhance the electromagnetic field while maintaining signal diversity for improved reliability
Solution Approach 2:
The patent applies periodic modulation of OAM modes across subframes according to specific patterns (e.g., alternating between +1 and -1 modes, or sequential progression). This periodic variation in OAM mode assignment creates controlled interference patterns that enhance the electromagnetic field periodically, improving both diversity effect and signal reliability
2Stability of the object's composition
If the same electromagnetic wave is transmitted repeatedly, then signal consistency is maintained, but electromagnetic waves do not interact and the electromagnetic field is not enhanced
Solution Approach 1:
The patent introduces asymmetry in the electromagnetic wave properties by assigning different OAM modes (different angular momentum quantum numbers) to different subframes. This asymmetric modulation allows the waves to have different phase structures and interference characteristics, enabling field enhancement through constructive interference while maintaining signal consistency through controlled modulation patterns
3Reliability
If OAM modes are varied across subframes to enhance electromagnetic field interaction, then diversity effect is improved, but system complexity increases
Solution Approach 1:
The patent segments the radio frame into multiple subframes, each assigned a specific OAM mode from a predefined sequence. This segmentation allows independent control of OAM characteristics for each subframe while using standardized mode assignment rules, reducing overall system complexity through modular organization
Solution Approach 2:
The patent establishes predefined OAM mode sequences and association relationships before transmission begins. These predetermined patterns (e.g., alternating modes, sequential progression) are configured in advance, eliminating the need for real-time complex calculations and reducing operational complexity during actual signal transmission
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively enhances the electromagnetic field, reduces signal fading, and improves the diversity effect by interacting electromagnetic waves with distinct OAM modes, leading to improved signal transmission reliability and capacity.
Implementation Method 1
electromagnetic waves interact with each other, to enhance an electromagnetic field, reduce signal fading, and improve a diversity effect
Data Source
AI summary
This application provides a communication method based on orbital angular momentum (OAM) and a related apparatus. The method includes: determining OAM modes for at least two subframes of a radio frame, where at least one symbol is mapped to each subframe in the at least two subframes; and sending the at least two subframes, where there is an association relationship between the OAM modes corresponding to the subframes in the at least two subframes. Embodiments of this application are implemented to enhance an electromagnetic field, reduce signal fading, and improve a diversity effect.