A Calibration Method for Nonlinear Mismatches in M-Channel Time-Interleaved Analog-to-Digital Converters Based on Hadamard Sequences

被引：5
作者：
Liu, Husheng [1 ]
Wang, Yinan [1 ]
Li, Nan [1 ]
Xu, Hui [1 ]
机构：
[1] Natl Univ Def Technol, Coll Elect Sci & Engn, Changsha 410073, Hunan, Peoples R China
来源：
Applied Sciences-Basel | 2016年 / 6卷 / 11期
关键词：
time-interleaved; analog-to-digital converter; nonlinear mismatch; binary Hadamard sequence; filtered-X least-mean square; FREQUENCY-RESPONSE MISMATCH; BLIND CALIBRATION; TIMING-SKEW; BACKGROUND CALIBRATION; ADCS; COMPENSATION; IDENTIFICATION; ERRORS; SIGNAL;
D O I：
10.3390/app6110362
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The time-interleaved analog-to-digital converter (TIADC) is an architecture used to achieve a high sampling rate and high dynamic performance. However, estimation and compensation methods are required to maintain the dynamic performance of the constituent analog-to-digital converters (ADCs) due to channel mismatches. This paper proposes a blind adaptive method to calibrate the nonlinear mismatches in M-channel TIADCs (M-TIADCs). The nonlinearity-induced error signal is reconstructed by the proposed multiplier Hadamard transform (MHT) structure, and the nonlinear parameters are estimated by the filtered-X least-mean square (FxLMS) algorithm. The performance of cascade calibration is also analyzed. The numerical simulation results show that the proposed method consumes much less hardware resources while maintaining the calibration performance.
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页数：17
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