Intelligent Reflecting Surface Phase Correction for Reflection Accuracy
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Solution Overview
Problem
Intelligent reflecting surfaces (IRS) in wireless communication systems often suffer from imperfections such as surface curvature, orientation variations, and surface imperfections, leading to incorrect signal reflection directions and patterns, particularly in millimeter wave bands, which degrade communication performance.
Innovation Solution
A method and apparatus for compensating IRS characteristics by determining and applying correction terms based on surface element coordinates and incident/reflected angles, using a controller to adjust phase shifts and orientations to improve signal reflection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IRS is deployed with surface elements to reflect signals, then signal reflection capability is improved, but surface imperfections cause incorrect reflection directions and patterns
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction terms for each surface element before actual signal reflection occurs. The controller obtains surface element coordinates and pre-determines correction terms that compensate for expected surface imperfections, so when signals are reflected, the corrections are already in place to counteract manufacturing defects.
Solution Approach 2:
The patent changes parameters by adjusting phase shifts and reflection directions dynamically. The controller calculates correction terms that modify the phase shift parameters of individual surface elements based on their coordinates and the desired reflection pattern, thereby compensating for surface imperfections through parameter adjustment rather than physical modification.
2Reliability
If correction terms are applied to compensate for surface imperfections, then signal reflection accuracy is improved, but system complexity increases
Solution Approach 1:
The system applies self-service by having the controller automatically obtain surface element coordinates, calculate appropriate correction terms, and apply them without external intervention. The IRS system self-corrects for its own surface imperfections through automated calculation and application of correction terms based on measured or stored coordinate information.
Solution Approach 2:
The patent implements feedback by using the controller to obtain surface element coordinates and use this information to calculate correction terms. The system continuously monitors surface element positions and adjusts reflection patterns accordingly, creating a closed-loop system where reflection accuracy is maintained through ongoing correction based on actual surface conditions.
3Productivity
If phase shifts are adjusted to correct surface imperfections, then communication performance is improved, but processing time increases
Solution Approach 1:
The patent reduces processing time by performing preliminary calculations of correction terms based on surface element coordinates before actual communication occurs. By pre-determining the correction terms that will be needed, the system avoids real-time calculation delays during active communication, thereby maintaining high throughput while still applying necessary corrections.
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 wireless communication performance by reducing latency and increasing throughput through improved signal reflection accuracy, enabling low-cost and portable IRS deployment despite surface imperfections.
Implementation Method 1
an intelligent reflecting surface (IRS) may be deployed to reflect or refract beams from a transmitter (TX) toward a receiver (RX)
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for compensating for certain characteristic(s) of an intelligent reflecting surface (IRS). A method that may be performed by a first wireless node includes obtaining an indication of a correction for an IRS to compensate for one or more characteristics of the IRS and communicating with a second wireless node via the IRS using the indication of the correction.