It is proved by simulation and experiment that we can obtain the TDE value precisely by this method and simultaneously the effect on TDE because of the ultrasonic echo specialty is avoided.

• 仿真与实验研究表明，该方法在高信噪比下可以精确得到时延估计值，同时避免了超声回波信号的慢衰减高频振荡特性对时延估计带来的影响。