{"title":"ADEV Calculated from Phase Noise Measurements and Its Possible Errors Due to FFT Sampling","authors":"Do-Cheng Chang, Shang-Shian Chen, Shinn-Yan Lin","doi":"10.1109/FREQ.2006.275452","DOIUrl":null,"url":null,"abstract":"In this paper, we show that fast Fourier transform (FFT) sampling plays an important role in the calculation of Allan deviation (ADEV) while using the numerical integration as a tool for the time and frequency (T&F) conversion. In order to avoid generation of unreasonable ADEV values, FFT sampling data are re-generated with logarithmic frequency space using an interpolation skill. Therefore, results from both the numerical integration and the power-law processes could match each other quite well. Besides, spurs in spectral density have non-neglectful influences upon ADEV results. For example, when the data of our lab's phase noise measurement system are processed, the ADEV generated from the spectral density with spurs may reach to three times the one while spurs are removed","PeriodicalId":445945,"journal":{"name":"2006 IEEE International Frequency Control Symposium and Exposition","volume":"8 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2006 IEEE International Frequency Control Symposium and Exposition","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/FREQ.2006.275452","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, we show that fast Fourier transform (FFT) sampling plays an important role in the calculation of Allan deviation (ADEV) while using the numerical integration as a tool for the time and frequency (T&F) conversion. In order to avoid generation of unreasonable ADEV values, FFT sampling data are re-generated with logarithmic frequency space using an interpolation skill. Therefore, results from both the numerical integration and the power-law processes could match each other quite well. Besides, spurs in spectral density have non-neglectful influences upon ADEV results. For example, when the data of our lab's phase noise measurement system are processed, the ADEV generated from the spectral density with spurs may reach to three times the one while spurs are removed
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
