An interference suppression technique for life detection using 5.75-and 35-GHz dual-frequency continuous-wave radar

Yang Zhang, Teng Jiao, Hao Lv, Sheng Li, Changzhi Li, Guohua Lu, Xiao Yu, Zhao Li, Jianqi Wang

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Life detection radar can detect human physiological signals (respiration, heartbeat, body movement, etc.) from a long distance away by penetrating nonmetal mediums (brick walls, ruins, etc.). However, interference is often caused by respiratory movements of the radar's operator when detecting vital signs of another human target. The detection accuracy can be significantly influenced by this kind of interference. In this letter, an experimental setup with a dual-frequency continuous-wave life detection radar is investigated. The system operates with different frequencies of 5.75 and 35 GHz. An adaptive filtering method is applied to suppress the interference caused by the operator's respiratory movements. Experimental results show that this method can effectively suppress respiratory interference and improve detection accuracy.

Original languageEnglish
Article number6882170
Pages (from-to)482-486
Number of pages5
JournalIEEE Geoscience and Remote Sensing Letters
Volume12
Issue number3
DOIs
StatePublished - Mar 1 2015

Keywords

  • Adaptive filters
  • dual-frequency
  • interference suppression
  • life detection radar

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