MIMO Radar Simulation Using Linear Approximation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ray tracing methods for MIMO radar systems result in high computational resource requirements and memory limitations due to the need to process a large number of rays for multiple transmitters and receivers, especially in systems with over 100 transmitter-receiver pairs.
Innovation Solution
A method that uses a single preset transmitting position and receiving position to simulate radar raw data by performing ray tracing, determining derivatives, and applying linear approximations to generate modified rays for each transmitter-receiver pair, reducing the need for individual ray tracing and minimizing computational resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional ray tracing methods are used for MIMO radar systems with multiple transmitters and receivers, then the simulation accuracy is improved, but the computational resource requirements and memory consumption increase significantly
Solution Approach 1:
The patent segments the ray tracing process by separating the common computation path (from reference transmitter to reference receiver) from the individual transmitter-receiver pair computations. By dividing the MIMO system into a reference pair and multiple other pairs, the method computes ray paths once for the reference pair and then efficiently derives paths for other pairs using differential relationships, reducing redundant computations while maintaining simulation accuracy for all transmitter-receiver combinations
Solution Approach 2:
The patent performs preliminary computation of ray paths, poses, and path lengths for a reference transmitter-receiver pair before computing paths for other pairs. By pre-computing the common path and storing its characteristics, the method enables subsequent pairs to leverage these pre-computed values through linear approximations, significantly reducing the computational burden while preserving simulation accuracy
2Measurement precision
If conventional ray tracing methods are used for MIMO radar systems with multiple transmitters and receivers, then the simulation accuracy is improved, but the memory consumption increases severely
Solution Approach 1:
The patent segments memory usage by storing only reference pair data (ray paths, poses, path lengths) rather than storing complete data for all transmitter-receiver pairs. This segmentation approach allows the system to compute and store minimal reference information while deriving other pair data through differential relationships, dramatically reducing memory requirements while maintaining the ability to generate accurate simulations for all pairs
Solution Approach 2:
The patent creates modified ray paths for different transmitter-receiver pairs by copying and differentiating the reference ray path data. Instead of storing complete independent ray tracing results for each pair, the method generates copies of the reference path with small differential adjustments based on transmitter and receiver position variations, reducing memory consumption while preserving accuracy
3Measurement precision
If conventional ray tracing methods are used for MIMO radar systems with more than 100 transmitter-receiver pairs, then the simulation accuracy is improved, but the computational time increases excessively
Solution Approach 1:
The patent performs preliminary computation of ray paths, poses, and path lengths for a reference transmitter-receiver pair before computing paths for other pairs. By pre-computing the common path and storing its characteristics, the method enables subsequent pairs to leverage these pre-computed values through linear approximations, significantly reducing the computational burden while preserving simulation accuracy
Solution Approach 2:
The patent segments the ray tracing process by separating the common computation path (from reference transmitter to reference receiver) from the individual transmitter-receiver pair computations. By dividing the MIMO system into a reference pair and multiple other pairs, the method computes ray paths once for the reference pair and then efficiently derives paths for other pairs using differential relationships, reducing redundant computations while maintaining simulation accuracy for all transmitter-receiver combinations
Data Source
Figure 1
Figure 2
AI summary
The invention refers to a method for computer-implemented simulation of radar raw data (RD), where the radar raw data (RD) are generated for a synthetic MIMO radar system (1) comprising a transmitter array (2) of several transmitters (201, 202) for transmitting radar signals and a receiver array (3) of several receivers (301, 302) for receiving radar echoes of the radar signals. In this method, ray tracing (RTR) of a radar signal (RS) sent from a preset transmitting position (TP) within the transmitter array (3) and received at a preset receiving position (RP) within the receiver array (3) is performed based on a 3D model (MO) of a virtual area (AR) adjacent to the MIMO radar system (1), where the ray tracing (RTR) determines propagations of a plurality of rays (R1, R2, R3) within the radar signal (RS) from the preset transmitting position (TP) to the preset receiving position (RP), the propagation of each ray (R1, R2, R3) being dependent on a first angle (θ) and a second angle (ϕ) describing the direction of a respective ray (R1, R2, R3) at the preset transmitting position (TP). By using first-order derivatives (d1, d2, d3, d4) with respect to the first angle (θ) and the second angle (ϕ), propagations (PRM) of a plurality of modified rays (RM) originating from a respective transmitter (201, 202) and received at a respective receiver (301, 302) are determined based on a linear approximation. The modified rays (RM) are processed in order to determine the radar raw data (RD).