摘要
为检测被强噪声淹没的微弱信号,以同步互相关数字锁定原理,基于高速浮点数字信号处理芯片TMS320C6701, 设计出数字锁定放大(DLIA)。实验证明该方法可检测出被强噪声淹没的微弱周期信号,极大改善信噪比(SNR)。
In order to detect very faintness signal which is flooded with strong noise, the method of correlation digital lock- in measurement principle is introduced. Based on a high - speed, float - type digital signal processor--TMS320C6701, a digital lock - in amplifier is designed. Experiments prove that the method can detect very laintness circle signal, and greatly improve the signal - noise ratio.
出处
《计算机测量与控制》
CSCD
2004年第7期606-609,共4页
Computer Measurement &Control
基金
教育部骨干教师基金资助项目"电容耦合电法测量新技术研究"
