基于Morlet小波函数的IDT建模与仿真  

Modeling and simulation of IDT based on Morlet wavelet

作　　者：文理为[1] 曾志超[1] 牟庆丰 王代强[1] 

机构地区：[1]贵州大学大数据与信息工程学院,贵州贵阳550025

出　　处：《电子设计工程》2016年第19期7-10,共4页Electronic Design Engineering

基　　金：国家自然科学基金项目(11564005)

摘　　要：为了得到更精确的IDT结构模型,本文提出了基于Morlet小波函数的IDT数学模型,通过Matlab对其频响特性进行仿真分析,并与改进型δ函数模型IDT结构进行比较。结果表明,在相同的参数情况下,校正后的Morlet小波式IDT结构主瓣保持得很好,具有很好的通带性和主瓣波形,相对于改进型δ函数模型IDT结构,校正后的Morlet小波式IDT结构旁瓣电平得到大大的抑制,声电转换效率更高。In order to obtain a more accurate IDT（Inter Digital Transducer）structure,a new IDT mathematical model is presented,based on Morlet wavelet function.Compared with the modified δ function model IDT of its frequency response characteristics by Matlab.The results shows,in the case of the same parameters,the adjusted Morlet wavelet IDT ＇s main lobe kept well,with good passband and the main lobe of the waveform.Compared with the modified δ function model IDT,the sidelobe level was greatly suppressed, and it has a higher acoustic-electric conversion efficiency.

关 键 词：Morlet小波函数 IDT MATLAB δ函数模型 频率响应 

分 类 号：TN65[电子电信—电路与系统]