摘要
针对空间辐射测量中的被测信号常常受到系统噪声、漂移及背景辐射的影响，讨论了一种用于空间辐射测量的信号检测方法———数字同步累加解调法。实现了测量系统对背景噪声的实时扣除，使系统的测量灵敏度约提高了一个量级。介绍了实现该方法的电子学系统构成及系统设计中要注意的关键环节。最后将该方法的测量结果与采用常规方法测量所得的结果进行了比较，证明该方法对背景噪声扣除了近８０％且对小信号测量的效果较佳。
To direct against system noise and drift as well as background radiation influence on signal on space radiation measuring, this paper describes a singal detecting method numeral synchronous accumulation and demodulation. This method realized real time deducting background noise and improved measuring sensitivity, is of one order of magnitude. Meanwhile, constituent of electric system and key link are introduced. The compared measuring results between this metod and general method show that this method deduct backgrond noise about 80% especially small signal.
出处
《光学精密工程》
EI
CAS
CSCD
1999年第3期113-117,共5页
Optics and Precision Engineering
关键词
空间辐射测量
同步累加解调
信号检测
背景噪声
Space radiation measure, Synchronous accumulation and demodulation, Signal detect, Background noise
