CAJ | 학술논문

微波干涉仪是测量常规武器内弹道参数的重要设备,传统的雷达信号处理方法主要使用短时傅里叶变换,不能兼顾时间和频率分辨率.因此,提出一种基于希尔伯特变换的算法,该算法能够获得更高的时间分辨率和测量精度.该算法利用希尔伯特变换获得精确的相位信息,并利用相位与弹丸行程存在的线性关系,计算出弹丸的行程.通过对小口径火箭弹的微波干涉仪实测数据的分析,结果证明基于希尔波特变换的干涉仪信号处理方法与基于短时傅里叶变换的处理方法相比,具有更高的时域分辨率.
미파간섭의시측량상규무기내탄도삼수적중요설비,전통적뢰체신호처리방법주요사용단시부리협변환,불능겸고시간화빈솔분변솔.인차,제출일충기우희이백특변환적산법,해산법능구획득경고적시간분변솔화측량정도.해산법이용희이백특변환획득정학적상위신식,병이용상위여탄환행정존재적선성관계,계산출탄환적행정.통과대소구경화전탄적미파간섭의실측수거적분석,결과증명기우희이파특변환적간섭의신호처리방법여기우단시부리협변환적처리방법상비,구유경고적시역분변솔.
Microwave interferometer is an important device for inner ballistic measurement of conventional weapons.The traditional radar signal processing method which uses STFT can not get good time resolution and frequency resolution at the same time.To solve this problem,a new algorithm based on Hilbert Transform is proposed to get better time resolution and advanced measurement precision.Hilbert transform is used to obtain the accurate phase information and the ammunition travel can be calculated using its linear relationship with phase information.Test data got from a microwave interferometer of a small caliber rocket shows that the method based on Hilbert transform can be used to get better time resolution than the method based on STFT.