并行数据采集系统中非均匀采样引起的误差分析  

Nonuniformly Sampling Error Analysis in Parallel Data Acquisition System

作　　者：唐婷[1] 何子述[1] 韩春林[1] 李会勇[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《数据采集与处理》2009年第3期340-344,共5页Journal of Data Acquisition and Processing

基　　金：国防预研基金(9140A07011307DZ02)资助项目

摘　　要：分析了并行数据采集系统中非均匀采样引起的误差。在给出误差平均功率表达式的基础上,推导出正弦信号输入时的信噪比近似计算公式,并对影响信噪比的各种因素依次进行讨论。进一步对线性调频信号输入的情况进行研究,根据信噪比计算公式给出了选取各参数的约束条件。仿真结果验证了信噪比计算公式的正确性。The error caused by nonumiformly sampling in parallel data acquisition system is analyzed. Based on the expression of the average error power, an approximate calculation formula of the signal-to-noise ratio is deduced for the sinusoidal signal input situation. The factors affecting the signal-to-noise ratio are discussed. Furthermore, the situation of the linear frequency modulated signal is researched, and the constraint conditions of the parameter selection are given. Simulation results demonstrate the correctness of the obtained calculation.

关 键 词：非均匀采样 正弦信号 线性调频信号 信噪比 

分 类 号：TN911.71[电子电信—通信与信息系统]