一种新的并行交替采样系统误差估计方法

doi:10.3969/j.issn.0372-2112.2014.05.012

电子学报 ›› 2014, Vol. 42 ›› Issue (5): 912-917.DOI: 10.3969/j.issn.0372-2112.2014.05.012

一种新的并行交替采样系统误差估计方法

马仑^1,2, 廖桂生², 杨鹏¹, 明洋¹

1. 长安大学信息工程学院, 陕西西安 710064;
2. 西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

收稿日期:2013-03-27 修回日期:2013-10-20 出版日期:2014-05-25
- 作者简介:
- 马仑 男，1981年生于北京.长安大学信息工程学院副教授.研究方向为雷达信号处理. E-mail:lunma@126.com廖桂生男，1963年生于广西.西安电子科技大学雷达信号处理国家重点实验室教授，现主要从事雷达信号处理等研究领域. E-mail:liaogs@xidian.edu.cn
- 基金资助:
- 国家自然科学基金 (No.61202438); 陕西省自然科学基金 (No.2011JQ8041); 国家级大学生创新训练计划 (No.201210710069)

A Novel Multi-Channel Mismatch Estimation Method for Parallel Time-Interleaved System

MA Lun^1,2, LIAO Gui-sheng², YANG Peng¹, MING Yang¹

1. School of Information Engineering, Chang'an University, Xi'an, Shaanxi 710064, China;
2. National Lab of Radar Signal Processing, Xidian University, Xi'an, Shaanxi 710071, China

Received:2013-03-27 Revised:2013-10-20 Online:2014-05-25 Published:2014-05-25
- Supported by:
- National Natural Science Foundation of China (No.61202438); Natural Science Foundation of Shaanxi Province, China (No.2011JQ8041); National Innovation and Entrepreneurship Training Program for College Students (No.201210710069)

摘要/Abstract

摘要： 并行交替采样系统的性能依赖于各通道的精确配合，相对于传统单通道采样系统，其面临更多的系统误差源.未补偿的失配误差将导致采样波形非线性失真、输出信噪比降低以及无伪峰动态范围损失等.本文提出了一种新的并行交替采样系统误差校正方法，在频域利用相邻频率点输出矢量对应信号子空间的旋转关系和正交投影矩阵的唯一性，实现增益误差以及时基误差的精确估计.该方法无需迭代，估计精度较高，对噪声以及偏置误差稳健，并且可以同时完成信号重构.仿真数据的处理结果验证了本文方法的有效性.

关键词: 并行交替采样, 模数转换器, 时基误差, 增益误差, 旋转不变性

Abstract: A major bottleneck in realizing a time-interleaved system is mismatches among the sub-ADCs,which may greatly degrade the receiver performance.In this paper,we investigated a novel mismatch estimation method,in which the coupling between time errors and gain errors is solved by using the rotational relationship between the signal subspaces with respect to two adjacent frequency bins.The decoupled mismatch errors can be estimated accurately free of iteration.Moreover,the presented method is robust to residual offset errors and system noise.The effectiveness of the proposed approach is verified by simulated data.

Key words: time-interleaved sampling, analog-to-digital converter (ADC), timing mismatch, gain mismatch, Rotational invariance

中图分类号:

TN957.5

马仑, 廖桂生, 杨鹏, 等. 一种新的并行交替采样系统误差估计方法[J]. 电子学报, 2014, 42(5): 912-917.

MA Lun, LIAO Gui-sheng, YANG Peng, et al. A Novel Multi-Channel Mismatch Estimation Method for Parallel Time-Interleaved System[J]. Acta Electronica Sinica, 2014, 42(5): 912-917.

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一种新的并行交替采样系统误差估计方法

A Novel Multi-Channel Mismatch Estimation Method for Parallel Time-Interleaved System

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