随机采样原理在远程超宽带雷达信号采样中的应用  

Random sampling theory in samples of UWB radar signals

作　　者：李宛州[1] 沈义民[2] 

机构地区：[1]清华大学自动化系,北京100084 [2]浙江大学科学仪器系,浙江杭州310027

出　　处：《清华大学学报（自然科学版）》2001年第3期125-127,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目! (60 0 82 0 0 1)

摘　　要：为实现超高速宽频带信号采样 ,研究了随机采样在宽频带雷达、数字存储示波器、频谱分析仪等现代仪器设计领域的应用方法。首次明确给出了等价采样与随机采样的定义 ,提出了随机采样原理应用于远程超宽带雷达信号采样系统的新思想 ,探索远程超宽带雷达的大时宽带宽积信号的一种新处理方法 ,在信息传送数据量允许的情况下 ,较传统的脉冲数据压缩方法简单且可靠。提出的原理实际应用于高速数字存储示波器系统设计中 ,以 2× 10 8s- 1 的 A - D转换器HI12 76达成了 2× 10 1 0 s- 1 的等价采样速率。In order to implement samplings on super speed WB (wide band) signals, this article studies the random sampling in the scope of modern instrument design, such as WB radar, digital oscilloscopes, spectral analyzers, etc. The exact definition of equivalence sampling and random sampling is given at the first time. Then an application of sampling theory to the new idea of a long distance UWB radar signals sampling system is submitted exploring a new method to analyze UWB radar signals. Under the circumstances of allowing a certain quantity of data transfer, it is more simple and reliable than the traditional pulses data compression. The principle is applied to the system design of a high speed digital oscilloscope using A D transfer HI1276 (2×10 8 s -1 ) to fulfill an equivalent 2×10 10 s -1 WB sampling.

关 键 词：等价采样 随机采样 触发相位差 时间轴展宽 远程超宽带雷达 信号采样 采样速率 

分 类 号：TN958.3[电子电信—信号与信息处理] TN957.51[电子电信—信息与通信工程]