The scheme of complex demodulation,using parallel architecture, was provided.
采用并联式复解调方案利用开关电流技术实现连续小波变换。
Each required bandpass filter is reduced to two lowpass filters which are relatively simple in design by using complex demodulation.
利用复解调技术将设计带通滤波器组转化为设计相对简单的低通滤波器组问题,给出了分解与重构的系统流程。
This article introduces the theory of digital complex demodulation.
在介绍数字复解调原理的前提下,实现了一个对雷达单频脉冲信号在中频直接数字化的数字复解调系统,该系统由A/D模块和DDC模块组成,着重介绍了DDC模块中数控振荡器和数字滤波器的原理以及实现。
Based on the Rayleigh-Sommerfeld diffraction integral and complex analytical signal representation,the free-space propagation equation and its Fourier spectrum for ultrashort chirped pulsed Gaussian beams are derived,and the far-field analytical electric field and spatial intensity are presented.
基于瑞利-索末菲衍射积分,使用复解析信号法推导出了啁啾脉冲高斯光束在自由空间中的传输方程及其傅里叶谱,给出了远场的光场和空间光强的解析式,研究了啁啾参数C对脉冲光束传输的影响。
By the use of numerical calculations, pulsed beams obtained by means of complex amplitude envelope representation and complex analytical signal representation are compared.
通过数值计算比较了分别采用复振幅包络(CAE)表示式和复解析信号(CAS)表示式得到的脉冲光束,得出了选择脉冲光束研究方法的条件。
We eliminate the spatial singularity by making use of the complex analytical signal theory (CAS), and then give the solution and simulation of the Gauss, hyperbolic se.
结果显示 ,在此情况下缓变包络近似理论已不再有效 ,其失效的原因是 ,该理论导致了脉冲光束解的空间奇异性 ,并使脉冲光束不再具有符合物理意义的光束行为 ,而通过复解析信号的分析方法可以消除这种空间奇异性 。