Velocity Estimation via Intelligent Reflecting Surfaces
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Solution Overview
Problem
Conventional mono-static sensing systems struggle to accurately estimate velocity due to limited information from the target-base station link and potential obstructions in complex environments, leading to significant estimation errors.
Innovation Solution
The use of intelligent reflecting surfaces (IRS) to create additional links between the target and the receiver, enabling accurate velocity estimation by analyzing Doppler frequencies from multiple perspectives, even when the direct link is obstructed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional mono-static sensing system is used, then the system structure is simple, but the velocity estimation accuracy is poor due to limited information from the target-base station link
Solution Approach 1:
The patent introduces intelligent reflecting surfaces (IRS) as intermediary elements to create additional signal paths between the target and base station. The IRS reflects signals to provide alternative communication channels when direct links are obstructed, enabling accurate velocity estimation through multiple perspectives without requiring complex multi-base-station infrastructure
Solution Approach 2:
The patent adds a spatial dimension to velocity estimation by utilizing reflected signal paths from intelligent reflecting surfaces positioned at different locations. This creates multiple observation angles and dimensions for measuring target motion, transforming a single-perspective measurement system into a multi-dimensional estimation framework
2Reliability
If the direct link between sensing node and target is used, then the system operation is simple, but the velocity estimation fails when the link is blocked or becomes blocked in complex environments
Solution Approach 1:
The patent employs intelligent reflecting surfaces as relay intermediaries to maintain signal connectivity when direct paths are blocked. The IRS creates reflected signal paths that bypass obstructions, ensuring continuous velocity estimation capability in complex environments with buildings, vehicles, or other blocking objects
Solution Approach 2:
The system pre-configures multiple intelligent reflecting surfaces at strategic locations before signal blockage occurs. These IRS elements are positioned in advance to provide alternative signal paths, ensuring that when direct links are blocked, the system can immediately switch to reflected paths without interruption to velocity estimation
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
This approach significantly improves velocity estimation accuracy by providing multiple perspectives on the target's motion, reducing estimation errors and enabling precise velocity determination in complex environments.
Implementation Method 1
a second signal comprising an indirect signal conveyed via an intelligent reflecting surface
Implementation Method 2
determining a Doppler frequency of the second signal; and based on the Doppler frequency, determining a velocity estimation of the target object
Data Source
AI summary
Velocity estimation using intelligent reflecting surfaces (e.g., using a computerized tool), is enabled. For example, a system can comprise at least one processor, and at least one memory that stores executable instructions that, when executed by the at least one processor, facilitate performance of operations. The operations can comprise based on a first signal between a receiver and a target object, determining a second signal between the receiver and the target object, wherein the first signal comprises a direct signal, and wherein the second signal comprises an indirect signal conveyed via an intelligent reflecting surface, determining a Doppler frequency of the second signal, and based on the Doppler frequency, determining a velocity estimation of the target object.