Modified Ray-Tracer for Electromagnetic Response Simulation
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Solution Overview
Problem
Existing electromagnetic response models for radar simulations are either too complex or too slow, failing to accurately simulate real-world electromagnetic responses, particularly in terms of vertical and horizontal multipath effects, and are inefficient in dynamic scenes.
Innovation Solution
A modified ray-tracer system that combines image theory and the shooting and bouncing rays method, using adaptive ray-launching and simplified large element physical optics, to efficiently simulate electromagnetic responses by reusing acceleration data structures and accounting for multipath effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing electromagnetic response models are used, then simulation accuracy is improved, but computational speed and efficiency deteriorate
Solution Approach 1:
The patent segments the complex electromagnetic simulation into distinct phases: ray generation, ray tracing, and electromagnetic response calculation. By separating these functions and using different computational methods for each phase (geometric optics for ray paths, physical optics for response calculation), the system achieves both accuracy and efficiency.
Solution Approach 2:
The patent performs preliminary ray tracing to identify which rays actually intersect with targets before performing the computationally intensive electromagnetic response calculations. This preliminary action filters out unnecessary calculations and focuses computational resources only on relevant ray-target interactions.
2Reliability
If complex electromagnetic response models are used, then simulation fidelity is improved, but device complexity increases
Solution Approach 1:
The patent applies different levels of computational complexity to different parts of the simulation. Geometric optics is used for ray path determination where simplicity is sufficient, while full electromagnetic response models are applied only at ray-target intersection points where accuracy is critical. This local differentiation maintains fidelity without unnecessary complexity.
Solution Approach 2:
The system performs preliminary geometric optics calculations to determine ray paths and intersection points before applying complex electromagnetic models. This preliminary action simplifies the overall system by handling the bulk of the computation with simpler methods.
3Ease of operation
If traditional ray-tracing methods are used, then ease of operation is improved, but productivity deteriorates
Solution Approach 1:
The patent merges geometric optics ray-tracing with physical optics electromagnetic response calculation into a unified simulation framework. This combination maintains the simplicity and intuitive nature of ray-tracing while incorporating accurate electromagnetic models where needed, achieving both ease of operation and high productivity.
Solution Approach 2:
The system performs preliminary ray-tracing to establish ray paths and identify target intersections before performing electromagnetic calculations. This preliminary action uses simple geometric methods that are easy to implement and operate, while setting up the framework for subsequent efficient electromagnetic response computation.
Data Source
AI summary
This document describes techniques and systems for a modified ray-tracer for an electromagnetic response simulator. Electromagnetic ray information, including a starting point and direction, is received. A potential target can be determined to be hit by the electromagnetic ray by converting the electromagnetic ray information from a global coordinate system of the environment to a local coordinate system of the potential target. The potential target is hit by the electromagnetic ray if a facet of the potential target is computed to be hit by the ray. The computations, performed in the local coordinate system of the potential target, include a simplified large element physical optics formulation for parallel rays. An electromagnetic response related to the potential target can be calculated if the facet of the potential target was determined to be hit. In this manner, an efficient and accurate electromagnetic response model may be approximated.