舰船电子工程
艦船電子工程
함선전자공정
SHIP ELECTRONIC ENGINEERING
2012年
12期
40-41,48
,共3页
微多普勒%小波多尺度分析%时-频分析%平滑伪WigneR-Ville分布
微多普勒%小波多呎度分析%時-頻分析%平滑偽WigneR-Ville分佈
미다보륵%소파다척도분석%시-빈분석%평활위WigneR-Ville분포
micro-Doppler%wavelet multi-resolution analysis%time-frequency analysis%smoothed pseudo Wigner-Ville distribution
目标结构的微小振动或转动会使回波信号产生频率调制,这种现象称为微多普勒现象。实验使用小波多尺度分析将时域信号分解为不同尺度信息下的信号成分,对含有微多普勒特征的信号成分进行重构,提取出微多普勒特征;通过时频联合分析的方法获取目标微多普勒特征参数。结果表明：实验中成功提取了目标微多普勒信号的信息,为获取和处理微多普勒信号提供了重要的工具和方法。
目標結構的微小振動或轉動會使迴波信號產生頻率調製,這種現象稱為微多普勒現象。實驗使用小波多呎度分析將時域信號分解為不同呎度信息下的信號成分,對含有微多普勒特徵的信號成分進行重構,提取齣微多普勒特徵;通過時頻聯閤分析的方法穫取目標微多普勒特徵參數。結果錶明：實驗中成功提取瞭目標微多普勒信號的信息,為穫取和處理微多普勒信號提供瞭重要的工具和方法。
목표결구적미소진동혹전동회사회파신호산생빈솔조제,저충현상칭위미다보륵현상。실험사용소파다척도분석장시역신호분해위불동척도신식하적신호성분,대함유미다보륵특정적신호성분진행중구,제취출미다보륵특정;통과시빈연합분석적방법획취목표미다보륵특정삼수。결과표명：실험중성공제취료목표미다보륵신호적신식,위획취화처리미다보륵신호제공료중요적공구화방법。
Mechanical vibrations or rotations of structures on a target may introduce frequency modulation on the radar returns.This is called micro-Doppler phenomenon.In this experiment,the time domain radar signal is decomposed into a set of components that are represented by different wavelet scales.The micro-Doppler features are extracted by sorting the components that are associated with the vibrational/rotational motions of a target and is achieved by reconstruction.Then the micro-motion information can be obtained by joint time-frequency analysis.Results show that three-level decomposition and reconstruction is sufficient to extract micro-Doppler features,and it provide an important tool and method for acquiring micro-Doppler signature.
