首页 | 本学科首页   官方微博 | 高级检索  
     

基于Blackman-Harris窗三谱线插值测试ADC信噪比的方法
引用本文:虞致国,孙益洲,黄朴,何芹,顾晓峰.基于Blackman-Harris窗三谱线插值测试ADC信噪比的方法[J].测试科学与仪器,2017(4):321-327.
作者姓名:虞致国  孙益洲  黄朴  何芹  顾晓峰
作者单位:物联网技术应用教育部工程研究中心,江苏 无锡 214122;江南大学 电子工程系,江苏 无锡 214122
基金项目:Summit of the Six Top Talents Program of Jiangsu Province,Fundamental Research Funds for the Central Universities,Graduate Student Innovation Program for Universities of Jiangsu Province
摘    要:利用快速傅里叶变换(FFT)测试模数转换器(ADC)的信噪比(SNR)必然存在非相干采样,导致测量结果会受频谱泄漏的影响.针对此问题,提出了一种利用Blackman-Harris窗三谱线插值测试高速ADC SNR的方法.基于MATLAB构建了验证平台,采用美国模拟器件公司(ADI)的AD9627等高速ADC产品的行为级动态模型进行了仿真验证.结果表明,在非相干程度最大的情况下,基于Blackman-Harris窗三谱线插值测试得到的SNR误差低于0.23 dB,达到了ADI公司提供的测试标准,证明该法能很好地抑制频谱泄漏的影响,提高SNR测试精度.

关 键 词:Blackman-Harris窗  信噪比  加窗插值  频谱泄漏  非相干采样

A Blackman-Harris windowed triple-spectrum-line interpolation method for measuring SNR of ADCs
Abstract:In the practical measurement of signal to noise ratio (SNR)of analog-to-digital converters (ADCs)by using fast Fou-rier transformation (FFT)method,the non-coherent sampling is inevitable,leading to spectral leakage which in turn affects the calculation accuracy and final measurement results.In this paper,a new method based on the Blackman-Harris windowed tri-ple-spectrum-line interpolation is presented for the measurement of ADC's SNR by FFT.The simulation platform is built based on MATLAB and the behavioral dynamic models of the high-speed ADC products of Analog Devices Inc.(ADI)are simulated. The simulation results show that,even in the case of the maximum non-coherent degree,the SNR error is less than 0.23 dB and reaches the testing standards provided by ADI,confirming that the proposed method is effective for suppressing the spec-tral leakage effects and improving the SNR test accuracy.
Keywords:Blackman-Harris windowed  signal to noise ratio (SNR)  triple-spectrum-line interpolation  spectral leakage  non-coherent sampling
本文献已被 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号