OAM Full-Duplex Transceiver for Self-Interference Separation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Full duplex communication systems face limitations in reducing self-interference, particularly due to bandwidth constraints and the need for multiple antennas and manual tuning, which hinders their adaptability in real-world environments.

Innovation Solution

A transceiver design that uses orbital angular momentum (OAM) functions to transmit and receive signals with orthogonal functions, allowing for simultaneous full duplex communications without interference by applying +ln and -ln functions to signals on the same frequency band, enabling automatic adaptation and wideband signal support.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If antenna cancellation techniques are used to reduce self-interference, then self-interference reduction is improved, but device complexity increases due to requiring three antennas

Engineering Contradiction:

Improveself-interferenceVSAvoidnumber of antennas

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent combines transmit and receive functions into a single antenna, eliminating the need for separate transmit and receive antennas. This merging approach reduces the total antenna count from three (in conventional antenna cancellation systems) to two, while maintaining self-interference cancellation capability through digital signal processing.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent replaces physical antenna cancellation mechanisms with digital signal processing techniques. Instead of relying on precise physical antenna placement and cancellation, the system uses digital filtering and signal processing to cancel self-interference, reducing hardware complexity while improving adaptability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Object-affected harmful factors

If antenna cancellation techniques are used, then self-interference cancellation is improved, but adaptability deteriorates due to requiring manual tuning

Engineering Contradiction:

Improveself-interferenceVSAvoidenvironmental adaptation

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent implements self-service through automatic tuning algorithms that enable the system to adapt to environmental changes without manual intervention. The digital signal processing automatically adjusts cancellation parameters based on real-time channel conditions, allowing the system to maintain optimal performance across varying environments.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent introduces dynamic adaptability by implementing real-time digital signal processing that continuously adjusts cancellation parameters. Unlike static antenna cancellation systems, this approach dynamically adapts to changing channel conditions, frequency variations, and environmental factors, enabling wideband signal support and automatic environment adaptation.

Inventive Principle:

Principle #15Dynamics

3Productivity

If conventional full duplex techniques are used, then simultaneous transmit and receive is enabled, but bandwidth is constrained due to self-interference limitations

Engineering Contradiction:

Improvesimultaneous communication capabilityVSAvoidbandwidth

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent replaces physical frequency separation mechanisms with digital signal processing techniques. Instead of requiring separate frequency bands for transmit and receive, the system uses digital filtering and cancellation to enable simultaneous full-duplex communication on the same frequency band, effectively doubling bandwidth utilization.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent enables a single frequency band to serve multiple functions simultaneously - both transmit and receive operations occur on the same frequency without interference. This universal usage of the frequency band eliminates the need for separate frequency allocation, maximizing spectral efficiency and bandwidth utilization.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11855366B2Full duplex using OAM

Publication Date: 2023.12.26 NXGEN PARTNERS IP LLC

AI summary

A transceiver for transmitting and receiving full duplex communications includes transmitter and receiver circuitry. The transmitter circuitry transmits from a first location first signals having a first orthogonal function +ln applied thereto on a first channel on a first frequency band to a second location. The receiver circuitry receives at the first location second signals on a second channel on the first frequency band from the second location having a second orthogonal function −ln applied thereto and the first signals having the first orthogonal function +ln applied thereto on the first channel on the first frequency band from the first location at a same time on the first frequency band. The receiver circuitry only processes received signals including the second orthogonal function −ln. The first signals on the first channel are transmitted on the first frequency band on the first frequency band at a same time the second signals on the second channel are received on the first frequency band on the first frequency band.