基于MSLDSMC窗的谐波与间谐波参数估计算法  

Harmonic and Inter-Harmonic Parameter Estimation Algorithm Based on MSLDSMC Window

作　　者：陈乾明 张志威 李明皓 汪旭明 雷可君[1] CHEN Qianming;ZHANG Zhiwei;LI Minghao;WANG Xuming;LEI Kejun(School of Communication and Electronic Engineering,Jishou University,Jishou 416000,Hunan China)

机构地区：[1]吉首大学通信与电子工程学院,湖南吉首416000

出　　处：《吉首大学学报（自然科学版）》2023年第6期20-27,66,共9页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(62161012,61861019);湖南省教育厅科学研究项目(21A0335);国家级大学生创新创业训练项目(S201910531004,S202010531009,202110531029);湖南省教学改革研究项目(2021JGSZ089,HNJG 20200562)。

摘　　要：快速傅里叶变换(FFT)方法在谐波检测过程中会出现频谱泄漏和栅栏效应,导致谐波与间谐波参数的检测精度不高.为了提高估计精度,利用最大旁瓣衰减窗(MSLD)进行乘积和卷积运算,构建出旁瓣性能优越的MSLD自乘卷积窗(MSLDSMC),并在此基础上设计了一种三谱线插值的高精度谐波与间谐波参数估计算法.在不同复杂场景下进行仿真实验,实验结果验证了基于MSLDSMC窗三谱线插值的谐波与间谐波参数估计算法检测的准确性.The fast Fourier transform(FFT)method may encounter spectral leakage and picket fence effect in harmonic detection,resulting in low accuracy in detecting harmonic and inter-harmonic parameters.To improve the detection accuracy,based on the maximum side lobe decay window(MSLD)with excellent sidelobe characteristics,we have constructe an MSLD self-multiplication-convolution window(MSLDSMC)by multiplication and convolution operations.On this basis we propos a high-precision estimation algorithm for harmonic and inter-harmonic parameters of three spectral line interpolation.Simulation experiments conducted in different complex scenarios verify the accuracy of harmonic and inter-harmonic parameter estimation algorithms based on MSLDSMC window three spectral line interpolation.

关 键 词：谐波分析 最大旁瓣衰减自乘自卷窗 三谱线插值 多项式拟合 间谐波 

分 类 号：TN935.1[电子电信—信号与信息处理]