Frequency-shifted FMCW method against DRFM spoofing attacks

Suna Yazar G., DEMİR Ş., KOÇ S. S.

Eurasip Journal on Advances in Signal Processing, cilt.2025, sa.1, 2025 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2025 Sayı: 1
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1186/s13634-025-01223-w
  • Dergi Adı: Eurasip Journal on Advances in Signal Processing
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, RILM Abstracts of Music Literature, zbMATH, Directory of Open Access Journals, Civil Engineering Abstracts
  • Anahtar Kelimeler: DRFM, ECCM, FMCW radar, Spoofing attack
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

This paper presents a new electronic counter-countermeasure (ECCM) method for frequency modulated continuous wave (FMCW) radars, designed to improve upon existing techniques. This method effectively counters deception attacks based on digital radio frequency memory (DRFM), in which an attacker repeats transmitted radar signals to create false targets. The core principle of the proposed ECCM method involves dividing a linear FMCW (LFMCW) chirp into sub-intervals, applying frequency shifts to each sub-interval before transmission. At the receiver, the incoming signal is dechirped with the original LFMCW, followed by a frequency shift for each sub-interval to recover the correct beat frequency. These frequency shifts are implemented entirely in the analog domain using voltage-controlled oscillators (VCOs). Simulation results across three scenarios with varying range and speed parameters show that the method maintains phase continuity in the beat signal, offering an advantage over similar ECCM techniques. Additionally, the analog implementation provides a low-complexity, cost-effective solution.