论文标题:多普勒测速雷达回波信号突变特征小波提取算法的研究
Research on Doppler Speed Estimation Radar Echo Character Extraction with Wavelets
论文作者 周旦红
论文导师 杨莘元,论文学位 硕士,论文专业 通信与信息系统
论文单位 哈尔滨工程大学,点击次数 109,论文页数 78页File Size3850k
2005-02-01论文网 http://www.lw23.com/lunwen_228106902/ 测速雷达;小波变换;信号奇异性;模拟信号源
Speed estimation radar; Wavelet transform; Signal singularity; Analog signal source
火炮射弹初速的精确测定,对确定火炮的弹道特性,提高火炮射击命中精度起着至关重要的作用,其中正确识别弹丸出膛并给出准确时间,对测速精度有很大的影响。 目前在高速射武器初速测量中,利用红外启动器检测弹丸出膛时刻存在明显的缺点和不足。针对这个问题,本文利用小波变换良好的时频局部化性质以及小波变换模极大值与信号奇异点之间的关系,提出了一种检测弹丸出膛时刻的新方法,研究了小波变换对高速火炮弹丸出膛时刻的准确检测和精确定位,从而取代红外启动器为测速雷达提供每发弹丸的起始时间零点,并在C6000通用信号处理平台上实现了小波算法及其优化。 本文根据弹道理论和雷达方程,建立了单弹丸速度变化规律的模型,模拟产生速射火炮回波信号,完成模拟信号源的算法仿真。 根据模拟火炮回波信号的仿真结果,并对一组实测数据进行检测,结果表明利用本文的小波提取算法检测测速雷达回波信号突变点是可行的,具有很高的定位精度,可以作为红外启动器的替代技术。
It is important to know the speciality of artillery"s trajectory, to improve the precision of shot that exact mensuration of artillery"s muzzle velocity which is deeply depend on the well and truly ascertain of fire time.There are many obvious disadvantages in using the infrared starter to measure the artillery"s muzzle velocity. On the basis of wavelet localization characteristic and the relation of wavelet module maximum and signal singularity, this paper put forward a new method: the wavelet transform is applied in a Doppler speed estimation radar. The method can detect accurately and localize precisely the transient feature of the Doppler speed estimation radar with wavelet transform, extract the points of fire time, replace the infrared starter and provide the initial time points of each pill for radar, realize and optimize the wavelet arithmetic in C6000.On trajectory theory and radar equation, build the model of pill velocity rule, imitate artillery echo, complete the arithmetic simulation of analog signal source.The simulation result shows that the method can effectively extract the fire points of each pill, and has the high locating precision.
|
