CAJ | 학술논문

设计低通陷波器对提高信号检测精度具有重要价值,从而实现对单频信号及包含线谱成分的信号检测.传统的低通陷波器设计方案采用二阶自适应格型IIR陷波器,信号和背景噪声形成同构,导致滤波性能不好.提出一种基于高频调幅增益多路反馈的低通陷波器优化设计方法.分析低通陷波器幅频响,进行硬件电路设计,采用DSP的电源电路对陷波器进行供电,通过自适应级联方法进行陷波设计,用多个固定陷波器级联抑制干扰成份,得到基于高频调幅增益多路反馈的低通陷波器,仿真实验表明,采用该陷波器进行信号采集和滤波,具有较好的信号输出增益,滤波性能较好,提高了对目标信号的检测能力,展示了较好的应用价值.
설계저통함파기대제고신호검측정도구유중요개치,종이실현대단빈신호급포함선보성분적신호검측.전통적저통함파기설계방안채용이계자괄응격형IIR함파기,신호화배경조성형성동구,도치려파성능불호.제출일충기우고빈조폭증익다로반궤적저통함파기우화설계방법.분석저통함파기폭빈향,진행경건전로설계,채용DSP적전원전로대함파기진행공전,통과자괄응급련방법진행함파설계,용다개고정함파기급련억제간우성빈,득도기우고빈조폭증익다로반궤적저통함파기,방진실험표명,채용해함파기진행신호채집화려파,구유교호적신호수출증익,려파성능교호,제고료대목표신호적검측능력,전시료교호적응용개치.
The design of low pass notch filter is of important value to improve the signal detection accuracy, so as to realize the detection of single frequency signal and the signal contains the line spectrum. The traditional low pass notch filter de-sign scheme with two order adaptive lattice IIR notch filter, the signal and background noise formed isomorphism, which causes the filter performance is not good. Put forward a kind of trap optimization design method of low pass high frequency amplitude modulated gain multiple based on feedback. Analysis on low pass notch filter amplitude frequency response, the hardware circuit design, supply power to the notch filter using the power supply circuit of DSP, notch design through the adaptive cascade method, with a plurality of fixing notch filter to suppress the interference component cascaded second-or-der low-pass, high frequency amplitude modulated gain multiple feedback based on notch filter, simulation results show that using the notch filter, signal acquisition and filtering, with signal output gain better, better filtering performance, im-prove the ability of detecting target signal, showing a good application value.