摘要
根据声纳低截获因子方程,结合雷达与通信领域低截获经验和声纳自身特点,提出了低截获信号发射和双基地(多基地)两项低截获声纳技术的实现策略。并围绕空、时、频以及能量这4大要素,介绍了低频信号技术、大时间带宽积技术、复合频(码)制技术、随机或非线性体制技术以及时频捷变技术等5项低截获声纳信号设计方法,深入分析了LPI波形的特性,设计出了一些具有良好低截获性能的波形,并以降频梳状信号(几何comb)和非线性调频脉冲串信号(NLFM)为例进行了仿真验证。结果表明,通过这种信号设计方法设计出来的信号具有较强的抗截获性能。
Based on the equation of low probability of intercept（LPI） factors of sonar,an implementation strategy of LPI signal transmitted technique and bistatic（or multiple bases） technique is presented for the LPI sonar by combining the sonar′s characteristics and the experiences in LPI radar application.Moreover,five LPI sonar signal design techniques,including low frequency signal technique,great time and bandwidth integrator technique,complex-code technique,random or nonlinear system technique,and time-frequency hopping technique are described with emphasis on the factors of space,time,frequency and power.The characteristics of LPI signal wave are analyzed,and several sonar signals with good LPI performance are designed.Simulation results of descending-frequency comb signal and non-linear frequency modulation（NLFM） pulse series signal demonstrate that the designed sonar signals have good LPI performance.
出处
《鱼雷技术》
2010年第2期99-103,共5页
Torpedo Technology
关键词
声纳
低截获概率(LPI)
抗截获
信号设计
仿真
sonar
low probability of intercept（LPI）
anti-interception
signal design
simulation
