基于频域信道估计算法的超声目标检测  

Ultrasonic Detection Based on Frequency Domain Channel Estimation Algorithm

作　　者：盛柳凯 徐大专[1] 

机构地区：[1]南京航空航天大学电子信息工程学院,南京210016

出　　处：《无损检测》2016年第8期17-21,共5页Nondestructive Testing

摘　　要：类比了超声波检测原理和无线通信理论中的多径效应,提出了一种基于单载波频域信道估计算法来实现超声波检测的方法。通过加循环前缀的Zadoff-Chu序列信号对目标距离进行估计,并实现无旁瓣的脉冲压缩。仿真结果表明,该方法可以在低信噪比下,很好地检测出信号,并能同时解决脉冲压缩的距离旁瓣问题。In this paper, through making an analogy of the principle of ultrasonic detection and the multipath effect in the wireless communication theory, we propose a method to realize the ultrasonic testing, which is based on single carrier frequency domain channel estimation algorithm. Zadoff-Chu sequence signal which is added a cycle prefix is used to estimate the target distance. At the same time, the distance sidelobe which is caused by pulse compression can be eliminated. The simulation results show that this method can detect the signal of well under a low SNR and solve the problem of the distance sidelobe of pulse compression.

关 键 词：超声检测 多径效应 频域信道估计 循环前缀 

分 类 号：TN791[电子电信—电路与系统] TG115.28[金属学及工艺—物理冶金]