High-Performance Anti-Retransmission Deception Jamming Utilizing Range Direction Multiple Input and Multiple Output...

Area of Science:

• Radar Systems Engineering
• Signal Processing
• Electronic Warfare

Background:

• Retransmission deception jamming poses a significant threat to Synthetic Aperture Radar (SAR) systems.
• Jamming degrades detection efficiency and introduces false targets, complicating SAR image interpretation.

Purpose of the Study:

• To propose and evaluate a novel Multiple Input Multiple Output (MIMO) SAR structure for suppressing retransmission deception jamming.
• To enhance the signal-to-interference ratio and peak amplitude ratio for improved jamming resistance.

Main Methods:

• A range direction MIMO SAR structure with antennas vertical to the azimuth is proposed.
• Orthogonal Frequency Division Multiplexing (OFDM) Linear Frequency Modulation (LFM) sub-band signals with random initial phases are transmitted concurrently.
• Echoes are processed to synthesize a wideband signal, degrading jamming strength and defocusing false targets.

Main Results:

• The proposed MIMO SAR method effectively increases the signal-to-interference ratio and peak amplitude ratio.
• Retransmission deception jamming is significantly degraded and defocused in the resulting SAR imagery.
• Well-focused SAR images are obtained despite the jamming attempts.

Conclusions:

• The novel range direction MIMO SAR structure offers a robust solution against retransmission deception jamming.
• The method enhances SAR detection efficiency and ensures reliable SAR image interpretation.
• Simulations confirm the effectiveness of the proposed MIMO SAR technique in complex jamming environments.