（毕业设计论文）《瞬态电脉冲采样研究》.doc

摘要 数字信号处理技术广泛的应用于科学与工程领域的各个方面，而数据的采集又是进行数字信号处理的先要条件，这使得数据采集系统成为数字信号处理系统中不可或缺的重要组成部分。随着数字信号处理技术日新月异的发展以及计算机等相关领域的持续发展，数字信号处理领域发生了深刻的变革，对数据采集系统提出了更高的性能要求，对采样速率和对采样数据的存储速度的要求越来越高。因此，高速率、大容量采集以及大的模拟信号输入带宽成为数字信号处理领域中的一项关键性技术。 本文设计并实现了一种新颖的脉冲体制超宽带采样接收系统，与传统的取样门有所不同，该接收机利用取样相位检测器（sampling phase detector，SPD）设计了一种开关速度极快的取样门。接收电路能很好的完成对微波信号的等效时间采样。实验检测表明，该接收机可以重建微波信号下变频后的基带信号，且基带信号与微波信号在形状上有高度的一致性，验证了设计方案的正确性。 关键词：超宽带接收机 取样相位检测器 等效时间采样 ABSTRACT Digital signal processing technology is widely used in each aspect of science and engineering fields, and data collection is on the precondition of digital signal processing, which makes the data acquisition system a important constituent part of the digital signal processing system. With the digital signal processing technologys rapid development and the sustainable development of the computer and related areas, digital signal processing field has changed so profoundly that data acquisition systems put forward higher performance requirements in the aspect of the sampling rate and the sampled data storage speed. Therefore, high speed, high capacity acquisition and big simulation signal input bandwidth become a key technology in the field of digital signal processing. This paper designs and realizes an novel ultra-wideband sampling receiving system of pulse system, and the receiver design a switch extremely fast sampling gate using the sampling phase detector (sampling phase detector, the SPD), which is different from the traditional sampling door. Receiving circuit can finish the equivalent time sampling well to microwave signal. The experiment test show that the receiver can rebuild baseband signal after down-transducering microwave signal, and there is a high degree of consistency in the shape between baseband signal and microwave signal, which verifys the correctness of the design plan. Keywords：ultra-wideband receiver sampling phase detector equivalent-time sampling 第一章 引言 1.1 研究的目的和意义 自然界中的物理量，绝大多数是在时间上和幅值上都连续变化的模拟量，或称为连续时间