CAJ | 학술논문

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。
맥충압축시신호검측적일개중요기술，재다목표수성배경하，위피면강목표맥충압축수출적방판엄매약목표적주판，인입창함수가권기술래억제방판，제고대목표적공간분변솔。동시고필도실험중성눌계통적대관화시관수한제，대우소시관대관적적맥충압축신호，인입보수정기술，진일보제고주방판비。이용Matlab급출이론방진결과，병통과실험험증해기술재조성배경하대관측소목표적실용성。
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.