几种新型主动声呐发射信号性能分析研究  

Performance analysis and research of several new active sonar signals

作　　者：李玉强[1] 杜选民[1] 周胜增[1] 

机构地区：[1]上海船舶电子设备研究所,上海201108

出　　处：《舰船科学技术》2015年第11期103-107,共5页Ship Science and Technology

摘　　要：主动声呐信号波形在主动声呐系统设计中占有十分重要的地位,声呐信号波形不仅决定了信号接收的处理方法,还直接决定了系统的时频分辨力、抗混响能力、目标跟踪等各方面性能。本文利用信号的模糊度函数和Q函数,研究了时下热点波形,包括梳状谱信号(SFM/PTFM)和雷达中研究相当成熟而在声呐中鲜有研究的复合声呐信号(LFM-Barker码),重点分析了其时频分辨力和抗混响性能。仿真及湖试结果表明对不同速度类型目标宜采用不同的发射信号波形,为主动声呐发射信号优选提供了参考和依据。Waveforms design of active sonar plays a very important role in the designing of active sonar system. The transmitted waveform not only determined the signal processing schemes,but also the system＇ s velocity / range resolution,reverberation suppression capabilities and tracking performance etc.In this paper,the reverberation suppression capabilities and velocity / range resolution of nowadays hotspot waveforms including comb-like spectrum signal（ SFM / PTFM） and complex sonar signal（ LFMBarker） that is properly studied in radar system while rare in sonar system are given emphasis on and analyzed. The results shows that the Doppler shift introduced by target movement determines what kind of pulse should be transmitted,the study make the foundation of the optimal transmission pulse selection for active sonar.

关 键 词：主动声呐 波形设计 模糊函数 时频分辨力 

分 类 号：U675.7[交通运输工程—船舶及航道工程]