CAJ | 학술논문

为提高超分辨率时延估计的抗噪性能，提出了基于全相位窄带滤波的超分辨率时延估计算法。在陷波器设计方法基础上，设计出中心频点可精确控制的具有类点通传输特性的窄带滤波器，然后用该滤波器对存在时延关系的两路采样序列进行滤波处理，再依照传统相位差时延估计法，即可获得高精度时延估计。仿真实验表明：相比于基于信号重心插值的超分辨率时延估计法，该方法信噪比范围要高出10,dB，具有广阔的工程应用前景。
위제고초분변솔시연고계적항조성능，제출료기우전상위착대려파적초분변솔시연고계산법。재함파기설계방법기출상，설계출중심빈점가정학공제적구유류점통전수특성적착대려파기，연후용해려파기대존재시연관계적량로채양서렬진행려파처리，재의조전통상위차시연고계법，즉가획득고정도시연고계。방진실험표명：상비우기우신호중심삽치적초분변솔시연고계법，해방법신조비범위요고출10,dB，구유엄활적공정응용전경。
To enhance the anti-noise performance of super-resolution time delay estimators,one novel time-delay estimator based on all-phase narrow-band filtering was proposed. First,based on the design of notching filter,a nar-row-band filter characterized with similar point-pass transfer curve was designed. Secondly,two sequences with de-lay relationship were processed by this filer. Finally,implementing conventional phase-difference estimating flow yielded a high-precision time delay estimation. Simulation results showed that , compared with the gravity-interpolation method,the proposed method enlarges the SNR application range by 10 dB. Therefore the proposed method has a wide prospect of applied engineering.