Advanced Electromagnetic Environment Simulation for Modern EW Systems

White Paper: Defense

SPONSORED BY:

The electromagnetic spectrum operations (EMSO) domain covers exploitation, attack, and protection of assets in the dynamic electromagnetic environment (EME). A subset, electromagnetic warfare (EW), evolves as the spectrum grows more complex, demanding simulation to evaluate new and upgraded EW systems against advancing radar and jamming. This white paper, the first of a three‑part series, introduces fundamental EW concepts and delves into technical EME scenario generation and system implementation.

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Overview

This white paper, “Electromagnetic Environmental Simulation for EW Systems – Part 1,” by Rohde & Schwarz, provides a comprehensive introduction to electromagnetic spectrum operations (EMSO) and environmental generation engineering critical to testing and developing electronic warfare (EW) systems.

The document begins by defining EMSO and EW, emphasizing the need to simulate complex electromagnetic operational environments (EMOE) closely resembling real-world conditions. Accurate simulation is vital due to the prohibitive cost, security risks, and impracticality of live open-air testing against modern multi-threat scenarios, which involve numerous emitters, waveforms, and environmental factors.

It details the levels of abstraction in EMSO testing, from component-level simulations at the discovery phase to complex, integrated system-of-systems testing at the theater or campaign level. This layered approach ensures testing rigor matches operational requirements, supporting everything from R&D to full mission rehearsal.

Critical to simulation fidelity is managing “truth” at three stages: simulation truth (accuracy of the scenario model), chamber truth (correct RF stimulus presented to the Device Under Test (DUT) or System Under Test (SUT)), and DUT/SUT truth (the system's response and perception). The paper advocates for rigorous verification, validation, and accreditation (VV&A) processes to maintain reliability and accountability of these simulations.

The paper also explains environmental generation building blocks, including libraries of real-world threat data and waveforms, scenario creation, digital output generation, and RF signal generation delivered either over the air (OTA) or through direct injection (DI). It highlights the trade-offs between these methods in terms of calibration complexity and flexibility.

Mechanics of building scenarios encompass representing emitters as physical RF sources characterized by waveforms (e.g., pulse descriptor words (PDW) or I/Q data), antenna patterns, motion, and mode changes. Threat modeling integrates mission, signature, object, and geospatial data to build realistic, dynamic threat environments, often encompassing thousands of simultaneous modes.

The document discusses scenario complexity management, from basic single emitter/device engagements to multi-emitter, multi-DUT scenarios with motion and mode adaptation, supported by contemporary high-performance computing resources.

In conclusion, EMSO environmental simulation is a complex but indispensable tool to develop, test, and validate EW systems in realistic conditions, enabling safer, more cost-effective, and highly flexible evaluations than traditional approaches.

References include relevant DoD doctrine and strategies, emphasizing the strategic importance of electromagnetic spectrum superiority and modeling rigor.

Overall, the paper provides foundational knowledge essential for EW engineers, testers, and program managers dealing with the challenges of simulating and validating sophisticated electromagnetic environments in modern warfare.