过零率检测算法在空中目标探测中的性能分析

The Performance Comparison Between the Energy Detection and the Zero-crossing Rates Detection in the Air Target Detection

空中目标声信号检测器是声探测系统中的重要组成部分,随着现代战场环境的日趋复杂化,被动声信号检测器以其自身独特的优势越来越受到人们的重视。文中提出了将语音信号检测中的过零率检测算法用于空中目标检测中的方法,并同传统的能量检测算法相比较。通过计算机仿真试验,结果表明过零率检测算法不但具有算法简单、运算时间短的特点,而且其稳定性比能量检测算法要好,具有一定的识别空中目标的能力。

Passive acoustic detector is an important part of the acoustic detection system. As the modern battlefield environment is getting more and more complicated, passive acoustic detector has attracted more and more people＇s attention, because of its superior character. In this passage, the zero-crossing rate detector used in speech signal detection has been used to detect air target, and also be compared with the energy detector. Through computer simulation, the results show that the zero-crossing rates detector not only has the characters of simple and short-time, but also is more stable than the energy detector. It also has the ability of identify the air target.