Tuesday, November 17, 2026

1:30 PM - 2:30 PM

Sutherland Theatre

---

Presentation Outline

This session presents a state-of-the-art investigation into the validation of three-dimensional interference propagation models for resilient GNSS and Controlled Reception Pattern Antenna (CRPA) systems in navigation-warfare environments. The work addresses a central research challenge: how to reproduce, in a controlled laboratory setting, the spatial and temporal effects observed during real-world interference—including terrain masking, diffraction, multipath, and changing line-of-sight conditions. A two-stage field-to-laboratory methodology is examined. First, receiver-level behavior is assessed using a fixed-pattern antenna and observable metrics such as carrier-to-noise density, satellite visibility, interruption timing, and reacquisition. Second, a four-element CRPA is evaluated using multi-channel RF recordings and identical offline Minimum Variance Distortionless Response processing for both measured and simulated datasets. A traceable power-matching procedure separates propagation-model errors from power-budget uncertainty. Results show that increasing environmental-model fidelity generally improves the reproduction of field-observed variability, visibility gaps, event timing, interference suppression, and adaptive-array null direction. The investigation also identifies important limits to current approaches. Near-grazing diffraction remains difficult to model accurately, while multipath simulations may overestimate degradation when antenna patterns and array-manifold assumptions are insufficiently realistic.

---

Speaker