Joint Blind Calibration for Mixed Mismatches in Two-Channel Time-Interleaved ADCs
Joint Blind Calibration for Mixed Mismatches in Two-Channel Time-Interleaved ADCs
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DOI：
10.1109/tcsi.2015.2418835
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发表时间：
2015-05
期刊：
影响因子：
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通讯作者：
Yinan Wang;H. Johansson;Hui Xu;Z. Sun
中科院分区：
文献类型：
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作者：
Yinan Wang;H. Johansson;Hui Xu;Z. Sun
为了进一步提高时间交错模数转换器（TI-ADC）的动态性能，应估计和补偿线性和非线性失配。介绍了一种双通道TI ADC中几种线性和非线性失配误差的联合校正方法。为了证明该方法的通用性，我们考虑了不同的场景，包括静态和动态混合失配模型。该方法利用归一化最小均方（N-LMS）算法以及一定程度的低过采样的整体转换器估计和补偿的混合失配误差。校准性能和计算复杂度进行了研究和评估，通过模拟。
To further enhance the dynamic performance of time-interleaved analog-to-digital converters (TI-ADCs), both linear and nonlinear mismatches should be estimated and compensated for. This paper introduces a method for joint calibration of several types of linear and nonlinear mismatch errors in two-channel TI-ADCs. To demonstrate the generality of this method, we take different scenarios into account, including static and dynamic mixed mismatch models. The proposed method utilizes a normalized least-mean square (N-LMS) algorithm as well as a certain low degree of oversampling for the overall converter to estimate and compensate for the mixed mismatch errors. The calibration performance and computational complexity are investigated and evaluated through simulations.