The traditional method is that the impulse response of filter can be gotten by optimization under the perfect reconstruction condition 传统的研究方法是在满足滤波器组完全重构的情况下通过寻优的方法得到滤波器的冲击响应，所得到的滤波器性能较差。
Finally , the information process model of the low frequency uwb - sar is given , and antenna pattern and the impulse response function of the system are discussed 最后研究了低频uwb - sar系统信息处理模型。利用该模型分析了天线方向图和系统的冲击响应函数。
System impulse response and the relation between layers of pipeline units are used and the wave " s converse as well as the aim to recognize the position of defect has been achieved 利用系统冲击响应及反射波的层状递推关系实现了波的反演，进而实现了缺陷定位。
Shock response signal curve fitting in the form of assembling the damped sin wavelets is researched to make the shock response spectrum ' s ( srs ) engineering application more concenient 摘要为便于冲击响应谱的工程应用，以正弦衰减基波组合的形式对冲击信号的拟合进行了研究。
In this paper , continuous wavelet transforms are adapted to analyze the field measurement data of buried cylinders and then the waveform characteristics of target impulse response are detected 本文通过连续小波变换，对地下圆柱目标实测结果进行分析，得到了目标冲击响应的典型波形特徵。
The method to get the parameters for each basic waveform was given by choosing the sine window function waveform as the basic waveform , and based on the srs time - history synthesis principle 依据冲击响应谱时域合成的一般原则，选择合成小波中的正弦窗波作为基本波形，给出了确定各基本波形的波形参数的方法。
The algorithm used to generate the time - history shock waveform can satisfy srs accuracy requirement , and can be a reference for the researchers who develop the control software for the srs test 计算结果表明所提算法是有效的，所合成的时域冲击波形能够满足参考冲击响应谱的精度要求，为开发冲击谱试验的控制软件研究者提供了一种思路。
Because period narrow band signals are the main part of background noises , this thesis uses hardware description language to design a multi - band finite impulse response filter ( fir ) and downloads the program into filed programmable gate array to eliminate the period narrow - band interferences in the background noises 3 )在现场环境中，背景干扰主要是周期性的窄带，本文利用硬件描述语言( vhdl )设计了一个多带fir有限冲击响应滤波器。应用到可编程逻辑器件中，消除了背景噪声中的周期性干扰，为信号的进一步处理提供尽可能干净的信号。
I find that the chinese stock market size was significantly and positively correlated with economic growth and saving deposits rate , even after controlling for other growth inducing variables . on the basis of this , the dynamic interaction relationship between stock market development and economic growth of china is examined in a bivariate vector autoregression ( var ) framework . i find there is one positive cointegration between stock market capitalization and economic growth , uni - directional causality from gdp to the stock market capitalization , but the stock market shock can influence the output positively 我们在两变量向量自回归模型框架下考察了中国经济增长与股票市场发展之间的动态互动关系：股市规模与总产出之间存在着正向的协整关系，表明两者在长期上是均衡发展的；格兰杰因果检验显示两者间存在着经济增长股票市场规模发展的单向因果关系，冲击响应分析结论指出股票市场和经济增长之间有着一种互动关系，股票市场和经济增长的正向变动均会给对方带来永久的正向影响，但目前股票市场冲击对产出的这种影响还很微弱。
On the basis of previous work , we developed a new data processing system by use of dsp & oop . the new system overcame the problems existed in the old data processing system successfully , such as the bug which cause program dead loop when the data is too long , and the frequency leak due to principle limit of fft filter . in addition , we eliminated the measurement error brought on by phase warp 我们在前人的工作基础上，利用现代数字信号处理技术和面向对象的软件开发技术，统一了弹上黑匣子数据处理系统的操作平台，完善了转速、扫描角测试数据处理系统，修正了原有处理程序中的因数据长度过长而导致程序死锁的bug ；利用有限冲击响应( fir )滤波器，在滤去噪声的同时，有效地解决了矩形窗fft滤波的频谱泄漏问题；另外还解决了因相位偏差而导致的测试误差。
