Calibration of frequency response mismatches in time-interleaved analog-to-digital converter based on adaptive method

被引：2
|
作者：
Xiang, Jingrui [1 ]
Tian, Shulin [1 ]
Pan, Huiqing [1 ,2 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Automation Engn, Chengdu, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Automation Engn, Chengdu 611731, Peoples R China
来源：
IET COMMUNICATIONS | 2023年 / 17卷 / 07期
关键词：
adaptive calibration; digital post-processing; frequency response mismatches; least mean square; time-interleaved ADC;
D O I：
10.1049/cmu2.12584
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The time-interleaved analog-to-digital converter (TIADC) system could achieve high sampling rate effectively, but the frequency response inconsistency among channels will introduce frequency response mismatches, which will seriously degrade the signal quality. In this paper, a novel multi-channel frequency response mismatches adaptive calibration method is proposed. The frequency response of the compensation filter is expanded into a polynomial of a digital differentiator, and the least mean square adaptive strategy is used to calibrate frequency response mismatches. It does not require measuring the channel frequency responses in advance and uses digital post-processing technology to effectively compensate the frequency response of the multi-channel TIADC system and improve the spurious-free dynamic range. The experimental results verify the effectiveness of the algorithm.
引用
收藏
页码：807 / 814
页数：8
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