摘要
通过对IIR滤波器结构分析,制作了超声回波信号高速采样系统,并基于TMS320C5402数字IIR滤波器,对超声回波信号进行了降噪处理.结果表明,与不经过IIR滤波的数字采样相比,应用该方法可以较好恢复超声回波信号,这对超声信号的在线检测有一定实用意义.
The digital filters include IIR filter and FIR filter, and IIR filter's processing speed and memory required are better than those of FIR filter. In this paper, the design of an IIR digital filter is introduced. Furthermore, a simplified design of an IIR filter is also discussed with the analysis of the IIR structure. In this way, the algorithm can be implemented on TMS320C5402, and used in detecting ultrasonic echo-signal to remove noise. And the result is satisfactory.
出处
《陕西师范大学学报(自然科学版)》
CAS
CSCD
北大核心
2006年第1期39-41,共3页
Journal of Shaanxi Normal University:Natural Science Edition
基金
陕西省自然科学基金资助项目(2004A08)