无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2014年
3期
40-42
,共3页
小波变换%导弹%遭遇时刻%奇异点
小波變換%導彈%遭遇時刻%奇異點
소파변환%도탄%조우시각%기이점
wavelet transform%missile%meeting moment%singular signal point
为准确检测导弹与靶船的遭遇时刻，分析了靶船的海上运动状态，基于小波变换奇异信号检测原理提出了弹靶遭遇时刻小波变换的检测方法。针对导弹命中锚泊靶船的航向信号特征，采用Daubechies小波对靶船航向信号进行分解重构和阈值分割，分析得到奇异点，奇异点对应时刻即为弹靶遭遇时刻。试验结果表明，小波变换具有良好的信噪分离能力，对信号奇异点检测比傅里叶变换具有更好的优越性，能够准确检测弹靶遭遇时刻。
為準確檢測導彈與靶船的遭遇時刻，分析瞭靶船的海上運動狀態，基于小波變換奇異信號檢測原理提齣瞭彈靶遭遇時刻小波變換的檢測方法。針對導彈命中錨泊靶船的航嚮信號特徵，採用Daubechies小波對靶船航嚮信號進行分解重構和閾值分割，分析得到奇異點，奇異點對應時刻即為彈靶遭遇時刻。試驗結果錶明，小波變換具有良好的信譟分離能力，對信號奇異點檢測比傅裏葉變換具有更好的優越性，能夠準確檢測彈靶遭遇時刻。
위준학검측도탄여파선적조우시각，분석료파선적해상운동상태，기우소파변환기이신호검측원리제출료탄파조우시각소파변환적검측방법。침대도탄명중묘박파선적항향신호특정，채용Daubechies소파대파선항향신호진행분해중구화역치분할，분석득도기이점，기이점대응시각즉위탄파조우시각。시험결과표명，소파변환구유량호적신조분리능력，대신호기이점검측비부리협변환구유경호적우월성，능구준학검측탄파조우시각。
In order to detect the meeting moment of missile and anchored target accurately,this paper analyzes the movement state of maritime target,puts forward a detection method of the meeting moment of missile and target based on wavelet transform.In view of the heading signal characteristic at the meeting moment of missile and anchored target,the Daubechies wavelet is used to implement the decomposition,reconstruction and threshold segmentation for the target heading signal,analyze and get the singular signal point.The time of singular signal point is the meeting moment of missile and target.The experiment results show that the wavelet transform has good sep-aration capability for signal and noise,better superiority than Fourier transform in detecting singular signal point,can detect the meeting moment of missile and anchored target accurately.
