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Signal Process."],"published-print":{"date-parts":[[2019,12]]},"abstract":"<jats:title>Abstract<\/jats:title>\n              <jats:p>This paper reports the investigation on the micromotion characteristics of chaff dipoles and a chaff cloud. Micromotion models of chaff dipoles and steady-state chaff clouds are discussed. Fourier transform method and time-frequency method are used to study the micromotion features of chaff dipoles, in the energy domain and time-frequency domain, respectively. Based on the characteristic parameters in these two domains, the simulation results show that there are micro-Doppler frequency components in the echo signals from chaff dipoles, and these frequency components vary periodically. Then, the micro-Doppler frequencies of chaff cloud are obtained based on the method of multipoint synthesis. Finally, the experimental results of chaff dipoles dispersion verify the micromotion characteristics of chaff dipoles and chaff cloud obtained by using the empirical mode decomposition method and the short-time Fourier transform method.<\/jats:p>","DOI":"10.1186\/s13634-019-0648-y","type":"journal-article","created":{"date-parts":[[2019,11,1]],"date-time":"2019-11-01T10:24:26Z","timestamp":1572603866000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Research on the micromotion characteristics of a chaff cloud"],"prefix":"10.1186","volume":"2019","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8204-6963","authenticated-orcid":false,"given":"Ran","family":"Li","sequence":"first","affiliation":[]},{"given":"Xinhong","family":"Hao","sequence":"additional","affiliation":[]},{"given":"Ping","family":"Li","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2019,11,1]]},"reference":[{"issue":"3","key":"648_CR1","first-page":"197","volume":"129","author":"BCF Butters","year":"1982","unstructured":"B.C.F. 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