谱修正技术在脉冲压缩信号检测中的应用  

Application of pulse compression technique in underwater acoustic detection

作　　者：邹彬彬[1] 陈晶晶[1] 荆成财[1] 王润田[1] 

机构地区：[1]中国科学院声学研究所东海研究站,上海200032

出　　处：《声学技术》2014年第3期275-279,共5页Technical Acoustics

基　　金：上海市科委"科技创新行动计划"资助项目(12231203800)

摘　　要：脉冲压缩是信号检测的一个重要技术,在多目标水声环境下,为避免强目标脉冲压缩输出的旁瓣掩埋弱目标的主瓣,引入窗函数加权技术来抑制旁瓣,提高对目标的空间分辨率。同时考虑到实验中声呐系统的带宽和时宽受限制,对于小时宽带宽积的脉冲压缩信号,引入谱修正技术,进一步提高主旁瓣比。利用Matlab给出理论仿真结果,并通过实验验证该技术在噪声背景下对观测小目标的实用性。In order to solve the contradiction between operation distance and range resolution of the sonar, the principle of pulse compression is analyzed. The sidelobe suppression of linear frequency modulation signal （LFM） is introduced to avoid target omission. Considering the small product of timewidth and bandwidth of sonar system, the technique of modification to signal spectrum is adopted .The suggested algorithm is simulated by MATLAB and realized based on ADSP-BF506F in our experiment.

关 键 词：脉冲压缩 抑制旁瓣 窗函数加权 谱修正技术 

分 类 号：TB556[理学—物理]