A Sampling Diversity Framework for HFM Pulsed Radar: Accurate Sensing Under Range Ambiguity


Rafique S., ARSLAN H.

IEEE Wireless Communications Letters, cilt.15, ss.1415-1419, 2026 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1109/lwc.2026.3655003
  • Dergi Adı: IEEE Wireless Communications Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Sayfa Sayıları: ss.1415-1419
  • Anahtar Kelimeler: Hyperbolic frequency modulated chirp, pulsed radar, range ambiguity, sampling diversity, sub-Nyquist sampling
  • İstanbul Medipol Üniversitesi Adresli: Evet

Özet

High pulse repetition frequency (PRF) radar operation enables Doppler-unambiguous sensing but introduces range ambiguity. This letter introduces a receiver-side sampling diversity framework that exploits the aliasing robustness of hyperbolic frequency-modulated (HFM) pulses. By varying the effective sampling rate across pulse repetition intervals (PRIs), ambiguous echoes are identified via matched-filter gain degradation and sidelobe metrics, then resolved through a sampling-match vote and range unwrapping. Doppler estimation is preserved by evaluating the slow-time phase at the disambiguated delay. Simulations demonstrate that the proposed scheme achieves comparable range/velocity accuracy to transmit-diversity alternatives while reducing computational complexity. This balance of performance, reduced complexity, and real-time capability makes it particularly suitable for roadside vehicular sensing.