New method for the calibration of realization errors in hybrid filter banks - 文章详情页

作者：

Liu, Sujuan (Liu, Sujuan.) | Yang, Yue (Yang, Yue.) | Chen, Jianxin (Chen, Jianxin.)

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EI Scopus PKU CSCD

摘要：

Realization　errors　degrade　the　reconstruction　performance　of　hybrid　filter　bank　(HFB)　analog-to-digital　converter　(ADC)　system.　A　general　analysis,　which　takes　into　consideration　analog　imperfections　and　channel　mismatches　based　on　HFB　architecture,　is　presented　in　theories　and　simulations.　Then,　a　flexible　frequency-dependent　equivalent　model　(FDEM)　is　derived　to　integrate　the　realization　errors　and　used　as　the　calibration　object　for　the　synthesis　filter　banks.　A　two-channel　HFB　ADC　prototype　with　12-bit　resolution　and　200　MHz　sampling　rate　was　implemented.　Experiment　results　show　that　using　the　proposed　calibration　method,　the　average　spurious-free　dynamic　range　(SFDR)　in　a　span　over　93%　of　the　whole　frequency　spectrum　(7%　over-sampling)　is　enhanced　from　35　dB　to　87　dB,　which　proves　the　feasibility　of　the　proposed　method.

关键词：

Filter banks Analog to digital conversion Errors Frequency converters Calibration

作者机构：

[ 1 ] [Liu, Sujuan]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Yang, Yue]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Chen, Jianxin]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China

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