并行A/D采集系统的时间延迟测量及待测信号的复原  

Reinstate of Signal under Test and Measure of Time Error in Parallel A/D Acquisition System

作　　者：陈刚[1] 杨青川[1] 

机构地区：[1]沈阳理工大学信息科学与工程学院,辽宁沈阳110159

出　　处：《仪表技术与传感器》2010年第5期77-79,共3页Instrument Technique and Sensor

摘　　要：并行时间交替采样是提高采样率的一种有效方法,但并行通道间的失配将使拼接后的信号成为非均匀采样,严重降低了整个A/D采集系统的性能。在对非均匀周期采样信号的数字谱进行了深入研究的基础上,提出了各通道时间延迟值的测量方法,及复原待测信号的方法。结合实例,在MATLAB环境下的仿真实验证实了方法的可行性和可靠性。The parallel time-interleaved sampling is an effective method to improve sample-rate.However,the mismatch between the parallel channels lead to nonuniform sampling and seriously degrade the performance of the whole A/D system.After analyzing the signal spectrums,this paper proposed a method to measure the delay time and reinstate of signal under test.With examples,in the MATLAB environment,simulation experiment results show that the method can calibrate the spectrums effectively,and is feasibility and reliable.

关 键 词：时间交替采样 延迟时间 非均匀采样信号 多路A/D 

分 类 号：TN911[电子电信—通信与信息系统]