FDA Jamming Against Airborne Phased-MIMO Radar-Part II: Jamming STAP Performance Analysis

TL;DR

This paper analyzes the effectiveness of FDA scattered wave jamming on phased-MIMO radar's STAP performance, providing theoretical insights and numerical validation for countering advanced radar systems.

Contribution

It offers a detailed theoretical analysis of FDA-SW jamming effects on STAP, including clutter rank variation and jamming frequency offset requirements.

Findings

FDA-SW jamming affects clutter rank and STAP performance.

Optimal jamming frequency offsets are identified for effective countermeasures.

Numerical results confirm the theoretical analysis and jamming effectiveness.

Abstract

The first part of this series introduced the effectiveness of frequency diverse array (FDA) jamming through direct wave propagation in countering airborne phased multiple-input multiple-output (Phased-MIMO) radar. This part focuses on the effectiveness of FDA scattered wave (FDA-SW) jamming on the space-time adaptive processing (STAP) for airborne phased-MIMO radar. Distinguished from the clutter signals, the ground equidistant scatterers of FDA-SW jamming constitute an elliptical ring, whose trajectory equations are mathematically derived to further determine the spatial frequency and Doppler frequency. For the phased-MIMO radar with different transmitting partitions, the effects of jamming frequency offset of FDA-SW on the clutter rank and STAP performance are discussed. Theoretical analysis provides the variation interval of clutter rank and the relationship between the jamming frequency offset and the improvement factor (IF) notch of phased-MIMO-STAP. Importantly, the requirements of jamming frequency offset for both two-part applications are discussed in this part. Numerical results verify these mathematical findings and validate the effectiveness of the proposed FDA jamming in countering the phased-MIMO radar.