跳频脉冲信号在水下沉底小目标探测中的应用  

Application of frequency-hopping waveforms in the detection of small targets on the seabed

作　　者：孙大军[1] 田坦[1] 张殿伦[1] 

机构地区：[1]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2007年第9期1025-1029,共5页Journal of Harbin Engineering University

摘　　要：提出了一种跳频脉冲信号非相干相关处理的方法.与常规拷贝相关比较,该方法更利于在探测水下沉底小目标时有效抑制海底混响.阐述了这种方法的基本原理以及实现的基本方案.同时,对跳频脉冲信号波形设计理论进行了研究,并结合工程实际给出了快速算法.海试结果表明,该方法抑制强海底混响的能力达到6 dB,提高了探测沉底小目标的作用距离.A random correlation processing method for frequency-hopping waveforms is proposed. Compared with conventional copy-correlation, it is more effective at reducing seabed reverberations when detecting small targets on the seabed. The principles and the implementation scheme are presente. The design theory behind frequency-hopping waveforms is analyzed and a fast algorithm based on actual engineering is given. Sea trial results indicated that this method effectively reduces seabed reverberations and increases operating range for the detection of small targets on the seabed.

关 键 词：跳频 非相干 水声 成像 

分 类 号：TB566[交通运输工程—水声工程]