Intermediate OAM Node Mode Switching for Extended Wireless Links
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Solution Overview
Problem
Current wireless communication systems face limitations in efficiently utilizing orbital angular momentum (OAM) modes for extended communication distances due to the restricted multiplexing degree and spectrum efficiency, especially as the distance between OAM nodes increases, leading to a decrease in the number of usable OAM modes.
Innovation Solution
Implementing an intermediate OAM node that receives a first signal based on a first set of OAM modes from a parent node and transmits a second signal based on a different set of OAM modes to a child node, utilizing mode-division duplexing (MDD) to enhance throughput and extend high-spectrum-efficiency communication distances by coordinating OAM modes between concatenated OAM links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If OAM modes are used for wireless communication over extended distances, then communication distance is improved, but the number of usable OAM modes decreases
Solution Approach 1:
The patent segments the communication path into multiple hops with intermediate OAM nodes. Each hop uses a subset of OAM modes, allowing the system to maintain high spectral efficiency over extended total distances by resetting the OAM mode set at each intermediate node rather than attempting to use all modes over the entire distance.
Solution Approach 2:
Intermediate OAM nodes act as mediators that receive signals from parent nodes and transmit to child nodes. These intermediaries enable extended communication by regenerating and retransmitting signals, effectively extending the communication distance beyond what a single direct link could achieve while maintaining spectral efficiency.
2Productivity
If more OAM modes are multiplexed to increase throughput, then spectral efficiency is improved, but device complexity increases
Solution Approach 1:
The communication system segments the multiplexing function across multiple intermediate nodes. Each node handles a manageable subset of OAM modes locally, avoiding the need for any single device to manage all multiplexing operations, thus reducing individual device complexity while maintaining overall high spectral efficiency.
Solution Approach 2:
The patent introduces a spatial dimension to the communication architecture by deploying intermediate nodes at different locations. This transforms the problem from managing high multiplexing degree in a single link to managing lower multiplexing degree across multiple spatial segments, reducing device complexity.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an intermediate orbital angular momentum (OAM) node may receive, from a parent OAM node via a parent link between the intermediate OAM node and the parent OAM node, a first signal based at least in part on a first set of OAM modes. The intermediate OAM node may transmit, to a child OAM node via a child link between the intermediate OAM node and the child OAM node, a second signal based at least in part on a second set of OAM modes that are different than the first set of OAM modes. Numerous other aspects are described.