Frequency shifted ECCM method for FMCW radars against DRFM spoofing attacks

Date

2024-7-5

Author

Suna Yazar, Gonca

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This study presents a new ECCM method for FMCW based radars, improving known techniques present in literature. The method is designed to be effective against deception attacks relying on DRFM, where the attacker has the ability to repeat transmitted radar signals to create false targets. The basic principle of the new ECCM method is dividing a linear FMCW chirp into sub intervals, then applying frequency shifts to each sub interval before transmission. At receiver side, the received signal is first mixed (dechirped) with the linear FMCW. After dechirp, frequency of each sub interval is shifted back to correct the frequency of the beat signal. These frequency shifts are implemented fully in analog domain with VCO elements. The method is evaluated by simulation under three different scenarios with different range and speed specifications. The introduced advantages are presented first for point target case, then under additional effects such as VCO settling time, phase noise and flat surface. For a wide range of conditions, the method maintains phase continuity of beat signal therefore preserves its advantage against similar ECCM techniques. In addition, implementation made in analog domain offers a low complexity and cost effective approach.

Subject Keywords

FMCW radar, ECCM, DRFM, Spoofing attack

URI

https://hdl.handle.net/11511/110838

Collections

Graduate School of Natural and Applied Sciences, Thesis