RIS Surface Array Impedance Control for Blind-Zone Signal Steering
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Solution Overview
Problem
Current Reconfigurable Intelligent Surface (RIS) devices require complex backend systems to determine signal directions, leading to communication delays and installation challenges due to their inability to dynamically adjust signal directions.
Innovation Solution
A signal transmission device with a surface array of signal transmission units, a sensing component, and a controller that adjusts impedance distribution based on signal strength feedback to dynamically control signal directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a Reconfigurable Intelligent Surface (RIS) device is installed to create a virtual line-of-sight path for signal transmission, then signal transmission through blind zones is improved, but the system complexity increases due to the need for backend systems to determine signal directions
Solution Approach 1:
The RIS device performs self-adjustment by using its own reflected signal as feedback. The sensing component detects the signal strength of the reflected signal, and the controller automatically adjusts the impedance distribution of the surface array based on this feedback, enabling the system to determine and optimize signal directions without external backend intervention.
Solution Approach 2:
The patent implements a feedback mechanism where the sensing component continuously monitors the signal strength of the reflected signal, and this information is fed back to the controller which adjusts the impedance distribution accordingly. This closed-loop feedback system enables automatic optimization of signal transmission paths.
2Reliability
If the backend system determines the signal directions and informs the RIS how to set directions, then signal transmission is achieved, but communication delays occur
Solution Approach 1:
The RIS device autonomously determines signal directions and adjusts its own configuration without requiring communication with external backend systems. The controller uses real-time feedback from the sensing component to automatically optimize the impedance distribution, eliminating communication delays entirely.
Solution Approach 2:
The patent replaces the mechanical/communication-based direction determination system (backend systems exchanging information) with a direct sensing and control system that operates locally and instantaneously, substituting complex communication protocols with simple real-time feedback measurement and adjustment.
3Reliability
If the backend system determines signal directions, then signal transmission is established, but installation complexity increases
Solution Approach 1:
The RIS device is designed to be self-configuring through automatic feedback-based adjustment. The sensing component and controller work together to autonomously determine optimal signal paths and adjust impedance distribution without requiring complex installation procedures or calibration by technicians.
Solution Approach 2:
The patent extracts the complex direction determination function from the external backend system and relocates it to the RIS device itself through the integrated sensing component and controller. This extraction eliminates the need for complex installation and coordination with external systems.
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
Enables instant and efficient adjustment of signal directions, simplifying installation and improving signal coverage, while maintaining efficient signal transmission.
Implementation Method 1
a plurality of signal transmission units are arranged into a surface array for receiving a transmission signal in a first direction and outputting at least a part of the transmission signal in a second direction, wherein the first direction and the second direction are associated with a current impedance distribution of the surface array
Implementation Method 2
The sensing component is connected to the plurality of signal transmission units and is configured to obtain a signal strength of a feedback signal associated with the transmission signal
Data Source
AI summary
A signal transmission device comprises a plurality of signal transmission units, a sensing component and a controller. The plurality of signal transmission units are arranged into a surface array for receiving a transmission signal in a first direction and outputting at least a part of the transmission signal in a second direction, wherein the first direction and the second direction are associated with a current impedance distribution of the surface array. The sensing component is connected to the plurality of signal transmission units and is configured to obtain a signal strength of a feedback signal associated with the transmission signal. The controller is connected to the plurality of signal transmission units and the sensing component, and is configured to adjust the current impedance distribution according to the signal strength.