Nicholas Ellis, Patrick Roblin, James Gaudreau, Joel T. Johnson, Justin Kuric, Christopher Ball, Richard Ridgway
{"title":"Identifying Quasi-Identical Power Amplifiers through EVM and NMSE Measurements of Output Data using Digital Post Distortion","authors":"Nicholas Ellis, Patrick Roblin, James Gaudreau, Joel T. Johnson, Justin Kuric, Christopher Ball, Richard Ridgway","doi":"10.1109/ARFTG59840.2024.10460691","DOIUrl":"https://doi.org/10.1109/ARFTG59840.2024.10460691","url":null,"abstract":"Quasi-identical power amplifiers can be differentiated through the unique non-linearities that are inherent to each individual power amplifier (PA). The use of error vector magnitude (EVM) and/or normalized mean squared error (NMSE) metrics relative to the reference input signal has been recently proposed as a metric. In this paper it is experimentally verified that first linearizing the PA outputs using the same digital post distortion (DPoD) technique to correct for the non-linearities of the reference PA, magnifies the differences observed in the EVM and NMSE metrics. As the signal-to-noise ratio (SNR) of the distorted signal output increases, the differences between the EVM/NMSE measurements of the two Pas also increases. At a high enough SNR, two quasi-identical Pas can be reliably differentiated using the EVM/NMSE metrics once DPoD has been applied.","PeriodicalId":518361,"journal":{"name":"2024 102nd ARFTG Microwave Measurement Conference (ARFTG)","volume":"30 3","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140531497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}