Multi-Circle OAM Duplexing for Orthogonal Wireless Multiplexing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing orbital angular momentum (OAM) modes for improved spectral efficiency and spatial multiplexing, particularly in high-frequency bands, due to limitations in orthogonal signal transmission and reception.
Innovation Solution
Implementing mode division duplex (MDD) techniques using co-axial multi-circle transceivers to orthogonally transmit and receive OAM signals in different modes, enabling efficient OAM multiplexing and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If OAM modes are used for wireless communication, then spectral efficiency and spatial multiplexing are improved, but signal orthogonality and interference reduction become difficult to maintain
Solution Approach 1:
The patent segments the OAM communication system into multiple independent circles, where each circle transmits OAM modes using dedicated time-frequency resources. This segmentation maintains signal orthogonality between different circles while enabling spectral efficiency improvement through multi-circle spatial multiplexing.
Solution Approach 2:
The patent introduces a new dimension for resource allocation by using multiple co-axial circles in addition to traditional time and frequency dimensions. Each circle can independently transmit OAM modes, creating a spatial dimension for multiplexing that improves spectral efficiency while maintaining orthogonality through circle-specific resource assignment.
2Productivity
If multiple OAM modes are transmitted simultaneously, then data rates are increased, but interference between modes increases
Solution Approach 1:
The patent divides the transmission system into multiple circles, with each circle transmitting a subset of OAM modes using dedicated time-frequency resources. This segmentation isolates interference within each circle while enabling overall data rate increase through parallel transmission across multiple circles.
Solution Approach 2:
The patent dynamically assigns time-frequency resources to different circles and OAM modes, allowing flexible adaptation to channel conditions. This dynamic allocation optimizes data rates while minimizing interference by assigning resources based on real-time signal quality and interference levels.
3Productivity
If co-axial multi-circle transceivers are used, then spatial multiplexing is improved, but device complexity increases
Solution Approach 1:
The patent segments the transceiver into multiple co-axial circles, with each circle having dedicated transmit and receive functionalities. This segmentation improves spatial multiplexing by enabling independent signal paths while managing complexity through modular circle-based architecture.
Solution Approach 2:
The patent designs the co-axial multi-circle transceiver with universal components that can function in both transmit and receive modes across different circles. This multi-functionality reduces overall device complexity by sharing common hardware resources while maintaining the spatial multiplexing benefits of multiple circles.
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
Enhances communication spectrum efficiency and data rates by allowing multiple OAM modes to be transmitted and received orthogonally, particularly in high-frequency bands, supporting advanced 5G and 6G communication technologies.
Implementation Method 1
transmitting, in a time-frequency resource occasion to a second wireless communication device, a first orbital angular momentum (OAM) signal in a first OAM mode
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first wireless communication device may transmit, in a time-frequency resource occasion to a second wireless communication device, a first orbital angular momentum (OAM) signal in a first OAM mode. The first wireless communication device may receive, in the time-frequency resource occasion from the second wireless communication device, a second OAM signal, in a second OAM mode, that is orthogonal to the first OAM signal. Numerous other aspects are described.