CAJ | 학술논문

为了不增大阵列尺度采用信号处理方法得到高分辨率的波束指向性,首先利用Notch滤波器的"离线重构"实现窄带波束形成,进而结合其瞬时相位估计方法,研究了基于自适应Noah滤波器的恒定束宽波束形成技术,利用信号处理方法将矢量传感器阵列接收的低频窄带信号转化为具有指向性的较高频率波束,并采用虚拟阵元技术消除波束栅瓣的影响,给出了实际应用中具体的信号处理方法.仿真和湖试验证表明这种基于自适应Notch滤波器的恒定束宽波束形成方法是合理可行的.最后,针对适应实时信号处理的要求提出将这种方法与目标自动跟踪系统相结合的改进方向.
위료불증대진렬척도채용신호처리방법득도고분변솔적파속지향성,수선이용Notch려파기적"리선중구"실현착대파속형성,진이결합기순시상위고계방법,연구료기우자괄응Noah려파기적항정속관파속형성기술,이용신호처리방법장시량전감기진렬접수적저빈착대신호전화위구유지향성적교고빈솔파속,병채용허의진원기술소제파속책판적영향,급출료실제응용중구체적신호처리방법.방진화호시험증표명저충기우자괄응Notch려파기적항정속관파속형성방법시합리가행적.최후,침대괄응실시신호처리적요구제출장저충방법여목표자동근종계통상결합적개진방향.
In order to gain the beam-forming directivity of distinguishing two underwater objects without greatly increasing the array size, a narrow-band beam-forming algorithm is achieved by "reconstitution" via adaptive Notch filter. Combined with instantaneous phase computation of Notch filter, a constant beam-width beam-forming method based on adaptive Notch filter is studied, which can gain high-frequency beam-forming directivity from low-frequency narrow-band signals received by vector array. The imagined-sensor technology is performed to eliminate sidelobes, and the actual signal processing method in experiments is described. Simulation and experiments show that the proposed method based on adaptive Notch filter is reasonable and feasible, and can be integrated with the automatic target tracking system to satisfy the request for real-time operation.