Abstract: Techniques and apparatuses are described that implement a high-fidelity radar simulator that performs operations associated with a radar system's hardware and/or software. The radar simulator can account for non-ideal characteristics within the radar system or environment and have an ability to process data from a variety of electromagnetic (EM) simulators. By using the radar simulator, an EM simulator can operate without specific information regarding the radar system's antenna response or signal generation. In this manner, the EM simulator can be decoupled from the radar system's design and operational configuration. Furthermore, the radar simulator can use the same environmental response data generated by the EM simulator to estimate performances of multiple radar systems. Use of the high-fidelity radar simulator enables problems to be efficiently discovered during design, integration, and testing phases of the radar system prior to performing a live test.

Abstract: This document describes techniques and systems for an adaptive ray-launcher for an electromagnetic response simulator. An adaptive ray-launching process is used to shoot electromagnetic rays at targets in a simulated environment. Uniformly distributed sparse electromagnetic rays are launched at the targets and the angular ray densities relative to the targets are calculated. Several propagation paths that include multipath effects are considered to determine the angular ray densities. Based on the length of the propagation paths of sparse electromagnetic rays with multipath related to each target, denser electromagnetic rays can be launched. The denser electromagnetic rays enable the fidelity related to targets in a far-range to be similar to the fidelity of closer targets. Additionally, any sparse electromagnetics that cannot be detected by a sensor can be disregarded. In this manner, an efficient and accurate electromagnetic response model may be approximated.

Abstract: This document describes techniques and systems for accurate and efficient electromagnetic response for a sensor simulator. Target information and sensor parameters for an electromagnetic sensor are simulated in an environment that includes a ground plane. Electromagnetic rays that may be detected by the sensor or an image of the sensor are launched from the simulated sensor toward the target and an image of the target about the ground plane to determine a complex electromagnetic response of the target. A ray-tracing algorithm is applied to trace the forward wave propagation of electromagnetic rays in the environment that considers rays bouncing between the target and the image of the target. An electromagnetic response can be modeled based on the congregation of the electromagnetic response of all backward paths of all bounces of all rays. In this manner, an efficient and accurate electromagnetic response model may be approximated.

Abstract: 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.

Abstract: This document describes techniques and systems to generate a point-source model for simulating near-field effects from structures of an antenna. The techniques and systems generate, based on near-field values extracted from electromagnetic simulations, respective far-field radiation patterns for active elements and, in some cases, passive elements of the antenna array. The far-field radiation patterns account for electromagnetic interactions between the active elements and an antenna structure, which can include passive elements of the antenna array. The techniques and systems output the far-field radiation patterns, which are effective to simulate, using an asymptotic numerical method, electromagnetic interactions between the antenna array and at least one interaction structure.

Abstract: Techniques and apparatuses are described that implement a high-fidelity radar simulator that performs operations associated with a radar system's hardware and/or software. The radar simulator can account for non-ideal characteristics within the radar system or environment and have an ability to process data from a variety of electromagnetic (EM) simulators. By using the radar simulator, an EM simulator can operate without specific information regarding the radar system's antenna response or signal generation. In this manner, the EM simulator can be decoupled from the radar system's design and operational configuration. Furthermore, the radar simulator can use the same environmental response data generated by the EM simulator to estimate performances of multiple radar systems. Use of the high-fidelity radar simulator enables problems to be efficiently discovered during design, integration, and testing phases of the radar system prior to performing a live test.

Abstract: Techniques and apparatuses are described that implement a high-fidelity radar simulator that performs operations associated with a radar system's hardware and/or software. The radar simulator can account for non-ideal characteristics within the radar system or environment and have an ability to process data from a variety of electromagnetic (EM) simulators. By using the radar simulator, an EM simulator can operate without specific information regarding the radar system's antenna response or signal generation. In this manner, the EM simulator can be decoupled from the radar system's design and operational configuration. Furthermore, the radar simulator can use the same environmental response data generated by the EM simulator to estimate performances of multiple radar systems. Use of the high-fidelity radar simulator enables problems to be efficiently discovered during design, integration, and testing phases of the radar system prior to performing a live test.

Abstract: This document describes techniques and systems to generate a point-source model for simulating near-field effects from structures of an antenna. The techniques and systems generate, based on near-field values extracted from electromagnetic simulations, respective far-field radiation patterns for active elements and, in some cases, passive elements of the antenna array. The far-field radiation patterns account for electromagnetic interactions between the active elements and an antenna structure, which can include passive elements of the antenna array. The techniques and systems output the far-field radiation patterns, which are effective to simulate, using an asymptotic numerical method, electromagnetic interactions between the antenna array and at least one interaction structure.

Abstract: Techniques and apparatuses are described that implement a high-fidelity radar simulator that performs operations associated with a radar system's hardware and/or software. The radar simulator can account for non-ideal characteristics within the radar system or environment and have an ability to process data from a variety of electromagnetic (EM) simulators. By using the radar simulator, an EM simulator can operate without specific information regarding the radar system's antenna response or signal generation. In this manner, the EM simulator can be decoupled from the radar system's design and operational configuration. Furthermore, the radar simulator can use the same environmental response data generated by the EM simulator to estimate performances of multiple radar systems. Use of the high-fidelity radar simulator enables problems to be efficiently discovered during design, integration, and testing phases of the radar system prior to performing a live test.