中文摘要：

本文提出一种新颖的信号检测方法。以自行构造的小波函数为发射信号，并选用该小波函数为基函数进行回波检测，实现完全意义的匹配小波信号检测。文中给出了此方法的原理及实现结构，从理论上分析了该方法的优点，并针对超声回波信号检测进行了仿真。结果表明，在信噪比为-17dB时，也能够检测出信号。与通常小波检测方法相比，本文方法提高了对弱小信号的检测能力。

英文摘要：

This paper proposed an novel method for detecting echo signals. The wavelet function is used as the transmitted signal and the echo signal is detected with the corresponding completely same wavelet base. So the best match can be arrived. The advantage and implementation of new method was described. The simulation of the ultrasonic detection indicates the validity of the new way. The numerical results show good detection even for SN-R of - 17dB. Comparing with traditional method, the new method can increase the ability of signal detection.