Micro-doppler effect in radar: Phenomenon, model, and simulation study

Victor C. Chen, Fayin Li, Shen Shyang Ho, Harry Wechsler

Research output: Contribution to journalArticlepeer-review

1659 Scopus citations


When, in addition to the constant Doppler frequency shift induced by the bulk motion of a radar target, the target or any structure on the target undergoes micro-motion dynamics, such as mechanical vibrations or rotations, the micro-motion dynamics induce Doppler modulations on the returned signal, referred to as the micro-Doppler effect. We introduce the micro-Doppler phenomenon in radar, develop a model of Doppler modulations, derive formulas of micro-Doppler induced by targets with vibration, rotation, tumbling and coning motions, and verify them by simulation studies, analyze time-varying micro-Doppler features using high-resolution time-frequency transforms, and demonstrate the micro-Doppler effect observed in real radar data.

Original languageEnglish (US)
Pages (from-to)2-21
Number of pages20
JournalIEEE Transactions on Aerospace and Electronic Systems
Issue number1
StatePublished - Jan 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Electrical and Electronic Engineering


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