一种面向声兼容设计的主动声呐发射波形优化方法  

Active sonar transmitting waveform optimization method for acoustic compatibility design

作　　者：周飞 ZHOU Fei(Shanghai Marine Electronic Equipment Research Institute,Shanghai 201108,China)

机构地区：[1]上海船舶电子设备研究所,上海201108

出　　处：《声学技术》2024年第3期355-361,共7页Technical Acoustics

摘　　要：针对多部舰载主动声呐同时工作时产生的声兼容问题,在现有波形设计方法的基础上,文章提出一种综合考虑特定频带功率谱和自相关旁瓣级的波形设计方法。波形设计时以舰载平台不同主动声呐工作频段作为先验知识,利用基于快速傅里叶变换(Fast Fourier Transform,FFT)的相位编码阻带循环算法(Stop Cyclic Algorithm-New,SCAN),综合考虑发射波形的功率谱和自相关旁瓣,引入惩罚函数,设计出一种同时兼顾特定频段功率谱陷波和相关旁瓣的发射波形。计算机仿真结果表明,SCAN算法设计后的发射波形可根据实际工作需求,通过对惩罚函数权重因子的控制,来实现对主动声呐发射波形任意工作频段功率谱抑制或发射波形自相关旁瓣的降低,从而有效减小舰载平台多部主动声呐同时工作产生的相互干扰。To solve the acoustic compatibility problem when multiple shipboard active sonars work at the same time,an active sonar transmitting waveform design method that comprehensively considers the power spectrum and autocorrelation side-lobe level in a specific frequency band is proposed according to the existing waveform design methods,and different active sonar working frequency bands are the prior knowledge of waveform design.By using the stop cyclic algorithm-new(SCAN)algorithm based on fast Fourier transform(FFT),the power spectrum and autocorrelation sidelobe of the transmitting waveform are comprehensively considered,and the penalty function is introduced to design an active transmitting waveform which takes into account both the power spectrum notch and the associated sidelobes in a specific frequency band.Computer simulation results show that the transmitting waveform designed by the SCAN algorithm can realize the spectrum suppression of the active sonar transmitting waveform in any working frequency band or the sidelobe suppression of the transmitting waveform by controlling the weight factor of the penalty function according to the actual work requirements,so that the mutual interference caused by simultaneous working of multiple active sonars on the shipboard platform can be effectively reduced.

关 键 词：声兼容 波形设计 功率谱抑制 旁瓣抑制 

分 类 号：TN99.17[电子电信—信号与信息处理]