基于FIR滤波器的冲激引信谐波噪声消除方法  

Harmonic Noise Reduction Method for Impulse Radar Fuze Based on FIR Filters

作　　者：宋宝军[1] 付红卫[1] 王欣[1] 

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《信息工程大学学报》2015年第3期350-353,共4页Journal of Information Engineering University

摘　　要：由于基于取样积分器的冲激引信其接收机输出的谐波噪声能够通过中频滤波电路,导致超宽带回波信号被淹没。分析了采用矩形窗函数法设计的FIR多带阻数字滤波器,并用此滤波器消除谐波噪声。仿真验证了该FIR滤波器使平均信噪比提升了4.1d B以上,可有效消除谐波噪声所带来的不利影响,提高冲激引信定炸精度。The harmonic noise can usually pass through the medium frequency filter circuit of the im- pulse radar fuze based on the sampling receiver and makes the UWB echo signal submerge within the harmonic noise. To address this problem this article analyzes the multi-bandstop digital FIR filter based on the window function method, tries to reduce the harmonic noise by the muhi-bandstop dig- ital FIR filter. Simulations demonstrate that the influence caused by harmonic noise could be better solved by the FIR filter and the SNR can be improved to 4.1 dB, the quality of echo signals has been improved effectively.

关 键 词：冲激引信 谐波噪声 FIR数字滤波器 矩形窗函数 

分 类 号：TN713[电子电信—电路与系统]