摘要
并行时间交替采样结构是一种有效地提高采样率的方法,但在采用此结构的采集系统中,多个ADC通道间的失配误差严重影响采集系统的性能,国内外对失配误差的测量和校正多采用加测试信号的方法。该文通过理论分析得出一种不需要测试信号且适用信号范围广泛的误差测量算法,并对国外文献中盲算法估计时间误差的方法进行了改进。计算机仿真证实了该方法对误差的估计有极高的精确度,能有效地提高采集系统性能。
The time-interleaved ADC structure is one way to increase the sampling rate. However, channel mismatch errors of this structure will increasingly degrade the performance of the whole system. For this reason, adding test signal is widely used when measuring and calibrating the mismatch errors. This paper propose a method which measure mismatches without the need of any special calibration signal and therefore has wide applications. Furthermore, the method of error estimation of blind algorithm is improved. The computer simulations show that the method estimates errors with high accuracy and can improve the performance of the system effectively.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2006年第3期313-316,共4页
Journal of University of Electronic Science and Technology of China
关键词
时间交替
增益误差
偏置误差
时间误差
盲算法
time-interleaved
gain errors
time-skew errors
offset errors
blind algorithm
