Blind timing error estimation based on the phasic relationship between nonoverlapping frequency points in time-interleaved ADCS - Details

Author：

Liu, Sujuan (Liu, Sujuan.) | Cui, Jiashuai (Cui, Jiashuai.) | Ma, Haixiao (Ma, Haixiao.) | Zou, Yuexian (Zou, Yuexian.)

Indexed by：

EI Scopus

Abstract：

A　time-interleaved　analog-to-digital　converter　(TIADC)　system　is　a　good　option　to　significantly　increase　the　sampling　rate　of　an　ADC.　However,　the　performance　of　a　TIADC　suffers　from　mismatch　errors　among　the　sub-channels,　especially　the　timing　error.　This　paper　presents　a　method　to　estimate　the　channel　timing　error　by　using　the　output　data　from　TIADC　and　its　corresponding　reference　channel.　The　proposed　method　introduces　an　estimate　model　based　on　the　phase　relationship　at　the　non-overlapping　frequency　points.　The　only　assumption　we　need　is　that　the　spectrum　of　input　signal　is　sparse.　The　simulations　show　that　the　proposed　method　can　estimate　the　timing　error　with　high　accuracy.　©　2014　IEEE.

Keyword：

Timing circuits Errors Frequency estimation Analog to digital conversion Blind equalization

Author Community：

[ 1 ] [Liu, Sujuan]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Cui, Jiashuai]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Ma, Haixiao]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Zou, Yuexian]ADSPLAB/ELIP, School of Electronic Computer Engineering, Peking University, Shenzhen; 518055, China